2024-03-28T16:55:37Zhttps://ruc.udc.es/oai/requestoai:ruc.udc.es:2183/802018-05-10T15:07:57Zcom_2183_75com_2183_18428com_2183_4774col_2183_76
RUC. Repositorio da Universidade da Coruña
author
Velando Rodríguez, Alberto
author
Freire, Juan
2005-10-28T10:35:13Z
2005-10-28T10:35:13Z
2002
Biological conservation, vol. 107, n.1 (Sep. 2002), p. 59-69
0006-3207
http://hdl.handle.net/2183/80
The European shag ("Phalacrocorax aristotelis") population at Cíes Islands (the most important breeding area in its southern limit)
increased rapidly from 1986 to 1992, and afterwards the population suffered a slight decline. This study analyzed population data
obtained from ringing recoveries and reproductive monitoring between 1993 and 1997. The reproductive success was highly variable
and associated with adverse weather events. Adult survival rate was very low compared with other colonies, probably due to high
accidental capture in gill-nets. In recent years, the fishing effort with gill-nets increased in the study area. Sensitivity analysis of
parameters showed that the population is more affected by changes in adult survival than in reproductive success. When dynamic
simulations were run with an increase in shag mortality of 5% above the present level, population extinction occurred in all simulations.
In contrast, when a reduction of mortality of 5% was introduced in the simulations, the population increased in all cases.
The main lines of action to study and protect this population should be: (1) ringing schemes to obtain better estimates of survival
variability; (2) studies on the interaction of feeding areas and fishing vessels; (3) regulations on gill-netting; and (4) the incorporation
of population models as an adaptive management tool to synthesize assessment work and management scenarios
eng
Phalacrocorax aristotelis
Population dynamics
Reproductive success
Recruitment
Survival
Population modelling of European shags ("Phalacrocorax aristotelis")
at their southern limit: conservation implications
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/80/1/Population_modelling_shag%2520%28Biol_Cons%29.pdf
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URL
http://ruc.udc.es/dspace/bitstream/2183/80/3/Population_modelling_shag%2520%28Biol_Cons%29.pdf.txt
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Population_modelling_shag%20(Biol_Cons).pdf.txt
oai:ruc.udc.es:2183/812019-11-18T13:37:27Zcom_2183_75com_2183_18428com_2183_4774col_2183_76
RUC. Repositorio da Universidade da Coruña
author
Fariña Pérez, Antonio Celso
author
Freire, Juan
author
González-Gurriarán, Eduardo
2005-10-28T10:35:19Z
2005-10-28T10:35:19Z
1997
Marine Biology, vol. 127, n. 3 (Feb. 1997), p. 419-434
0025-3162
http://hdl.handle.net/2183/81
The structure of megabenthic decapod crustacean
assemblages on the Galician (north-west Spain)
continental shelf (100 to 200 depth) and upper slope (200
to 500 m) was analyzed based on surveys carried out in
autumn and spring, from 1980 to 1987. Forty species
belonging to 19 families were caught. The portunid crab
"Polybius henslowii", a species with pelagic phases, was the
most abundant species, but displayed strong spatial and
temporal fluctuations. Other dominant species were the
Norway lobster "Nephrops norvegicus", the portunid "Liocarcinus
depurator", the galatheids "Munida intermedia" and
"M. sarsi", and the shrimps "Solenocera membranacea",
"Plesionika heterocarpus", "Pasiphaea sivado" and "Dichelopandalus
bonnieri". Total abundance and biomass (average
values excluding Polybius henslowii = 255 individuals
and 2.06 kg/30 min tow) and species richness
and diversity, Ht (6.85 species and Ht = 1.45 per tow)
displayed a significant positive correlation with depth,
and strong interannual fluctuations. The factors determining
community organization were depth and, to a
lesser extent, spatial structure. There was clear evidence
of bathymetric zonation, differentiating between species
characteristic of the slope ("D. bonnieri" and "Pasiphaea
sivado"), shelf-slope edge ("Macropipus tuberculatus", "Pontophilus
spinosus", "Munida sarsi", "S. membranacea", "Processa
spp.") and shelf ("L. depurator", "Macropodia tenuirostris",
"Paguridae" and "Chlorotocus crassicornis"). The
spatial zonation was related to changes in oceanography
and sediment along the continental margin. "Goneplax rhomboides", "N. norvegicus", "C. crassicornis" and "Alpheus
glaber" are benthic species which generally exhibit burrowing
behaviour, and they were found mainly in the
southern area where there are fine sediments due to the
outwelling from the Rías Baixas. Different benthopelagic
shrimps ("Pontophilus spinosus", "Plesionika heterocarpus",
"Processa spp." and "Pasiphaea sivado") were typical of the
zone just north of Fisterra, characterized by a convergence
of water masses bringing about an increase in
productivity due to upwelling. The benthic anomuran
and brachyuran crabs "Munida intermedia", "M. sarsi",
"L. depurator" and "Macropipus tuberculatus" were characteristic
of the northwestern zone between Fisterra and
Estaca, where the infauna reaches high biomass despite
coarser sediments with a lower concentration of organic
material than in the southern area. Lastly, both the
"Paguridae" and "Macropodia tenuirostris" were species typically
found in the waters in the northern shelf. Based
on interannual changes in assemblage structure, two
periods could be distinguished: between 1980 and 1984,
when "Polybius henslowii", "D. bonnieri" and "Pasiphaea sivado"
had abundance peaks; and another period from
1985 to 1987 when "L. depurator", "Munida intermedia",
"M. sarsi" and "Macropipus tuberculatus" increased in
abundance
eng
Megabenthic decapod crustacean assemblages
on the Galician continental shelf and upper slope (north-west Spain)
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/81/1/Megabenthic_crustacean_assemblages%2520%28Mar_Biol%29.pdf
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URL
http://ruc.udc.es/dspace/bitstream/2183/81/3/Megabenthic_crustacean_assemblages%2520%28Mar_Biol%29.pdf.txt
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oai:ruc.udc.es:2183/822018-06-13T08:14:57Zcom_2183_75com_2183_18428com_2183_4774col_2183_76
RUC. Repositorio da Universidade da Coruña
author
Godínez Domínguez, Enrique
author
Freire, Juan
2005-10-28T10:35:24Z
2005-10-28T10:35:24Z
2003
Marine ecology progress series, vol. 253, 17-24
0171-8630
http://hdl.handle.net/2183/82
The literature on the ecology of marine assemblages includes frequent examples of data
analysis with no well-defined alternative hypotheses for the definition of environmental variables
(independent matrix for multivariate methods). Alternative models, whereby spatial or temporal
patterns are investigated, should be explicitly assumed. We present a parsimonious procedure for
model selection in multivariate data combined with canonical correspondence analysis to determine
the measure of explained variance for each tested model, using Akaike’s information criterion (AIC)
for model selection. The AIC procedure is an effective tool for model selection and, in contrast to
other conventional procedures that use only 1 implicit model and ignore other community patterns, it
provides a framework for ranking hierarchical patterns that adds an alternative non-disjunctive perspective
to assemblage analysis. Hierarchical patterns are revealed as layers in a scale-dependent
framework
eng
Akaike's information criterion
Model selection
Spatial models
Temporal models
Canonical correspondence analysis
Parsimony
Marine benthic communities
Community dynamics
Information-theoretic approach for selection
of spatial and temporal models of community organization
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/82/1/Modelling_marine_communities%2520%28MEPS%29.pdf
File
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Modelling_marine_communities%20(MEPS).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/82/3/Modelling_marine_communities%2520%28MEPS%29.pdf.txt
File
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Modelling_marine_communities%20(MEPS).pdf.txt
oai:ruc.udc.es:2183/832019-11-18T13:35:37Zcom_2183_75com_2183_18428com_2183_4774col_2183_76
RUC. Repositorio da Universidade da Coruña
author
Freire, Juan
author
González-Gurriarán, Eduardo
2005-10-28T10:35:31Z
2005-10-28T10:35:31Z
1998
Hydrobiologia, vol. 371-372, n. 0 (Jan. 1998), p. 123-132
http://hdl.handle.net/2183/83
Decapod crustaceans have complex life histories and behaviour in aspects such as foraging, mating and reproduction,
moulting and growth, habitat selection and migration. New technologies have enabled us to use an individual,
field-based approach to analyze these problems, although they have been less developed in decapods than in marine
vertebrates. These new possibilities are discussed here mainly from a biological point of view. There is a brief
review of previous applications of telemetry to analyze habitat selection, foraging behaviour, energetics, moulting
site selection and migrations in decapods, and two case studies are discussed in more detail. The first one refers to
the study of differences in habitat use and movement patterns in juveniles and adults of coastal species that show
ontogenetic habitat shifts, related to differences in selective pressures affecting both life history stages (predation
risk, and growth and reproduction optimization). The second case study is dedicated to the migratory patterns in
spider crabs combining telemetry and electronic tags. Operational limitations in tracking make it impossible to
get detailed information on movement patterns during migration, which in turn involve an important bathymetric
gradient and a change in the oceanographic environment (mainly temperature).Monitoring depth and temperature
in the immediate habitat of the animals, using electronic data storage tags recovered by the fishery, allow for
movement patterns to be modeled using supplementary information on the topography and hydrography of the
study area. This approach is being tested using both telemetry and electronic tags simultaneously
eng
Behavioural ecology
Crustaceans
Decapods
Electronic tags
Migrations
Telemetry
New approaches to the behavioural ecology of decapod crustaceans
using telemetry and electronic tags
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/83/1/Behavioural_ecology_telemetry_decapods%2520%28Hydrobiologia%29.pdf
File
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Behavioural_ecology_telemetry_decapods%20(Hydrobiologia).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/83/3/Behavioural_ecology_telemetry_decapods%2520%28Hydrobiologia%29.pdf.txt
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Behavioural_ecology_telemetry_decapods%20(Hydrobiologia).pdf.txt
oai:ruc.udc.es:2183/842022-07-06T20:24:18Zcom_2183_75com_2183_18428com_2183_4774col_2183_76
RUC. Repositorio da Universidade da Coruña
author
Bernárdez Martí, Cristina
author
Freire, Juan
author
González-Gurriarán, Eduardo
2005-10-28T10:35:35Z
2005-10-28T10:35:35Z
2000
Journal of the Marine Biological Association, 80 (2000), p. 95-102
http://hdl.handle.net/2183/84
eng
Feeding of the spider crab Maja squinado in rocky subtidal areas of the Ría de Arousa (Galicia, NW Spain)
info:eu-repo/semantics/article
URL
https://ruc.udc.es/dspace/bitstream/2183/84/1/Feeding_spider_crab%2520%28JMBAUK%29.pdf
File
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Feeding_spider_crab%20(JMBAUK).pdf
URL
https://ruc.udc.es/dspace/bitstream/2183/84/3/Feeding_spider_crab%2520%28JMBAUK%29.pdf.txt
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oai:ruc.udc.es:2183/852018-05-10T15:03:28Zcom_2183_75com_2183_18428com_2183_4774col_2183_76col_2183_78oai:ruc.udc.es:2183/862019-11-27T12:52:43Zcom_2183_75com_2183_18428com_2183_4774col_2183_76
RUC. Repositorio da Universidade da Coruña
author
Freire, Juan
author
Bernárdez Martí, Cristina
author
Corgos López-Prado, Antonio
author
Fernández, Luis
author
González-Gurriarán, Eduardo
author
Sampedro Pastor, María Paz
author
Verísimo Amor, Patricia
2005-10-28T10:35:49Z
2005-10-28T10:35:49Z
2002
Aquatic ecology, vol. 36, n. 1 (Jan. 2002), p. 41-50
1386-2588
http://hdl.handle.net/2183/86
Artisanal coastal invertebrate fisheries in Galicia are socio-economically important and ecologically relevant. Their
management, however, has been based on models of fish population dynamics appropriate for highly mobile demersal
or pelagic resources and for industrial fisheries. These management systems focus on regulating fishing effort,
but in coastal ecosystems activities that change or destruct key habitats may have a greater effect on population
abundance than does fishing mortality. The Golfo Artabro was analysed as a representative example of a coastal
ecosystem in Galicia, and the spider crab "Maja squinado" used as a model of an exploited coastal invertebrate,
for which shallow coastal areas are key habitats for juvenile stages. The commercial legal gillnet fishery for the
spider crab harvests adults during their reproductive migrations to deep waters and in their wintering habitats.
Illegal fisheries operate in shallow waters. The annual rate of exploitation is higher to 90%, and lower to 10% of the primiparous
females reproduce effectively at least once. A simple spatially-explicit cohort model was constructed to simulate
the population dynamics of spider crab females. Yield- and egg-per-recruit analyses corresponding to different
exploitation regimes were performed to compare management policies directed to control the fishing effort or
to protect key habitats. It was found that the protection of juvenile habitats could allow increases in yield and
reproductive effort higher than in the present system, with such protection based in the control of the fishing effort
of the legal fishery. Additionally, there is an urgent need for alternative research and management strategies in
artisanal coastal fisheries based on the implementation of a system of territorial use rights for fishers, the integration
of the fishers into assessment and management processes, and the protection of key habitats (marine reserves) as a
basic tool for the regulation of the fisheries.
eng
Coastal ecosystems
Fisheries management
Conservation biology
Benthic invertebrates
Marine protected areas
Population dynamics
Management strategies for sustainable invertebrate fisheries in coastal
ecosystems of Galicia (NW Spain)
info:eu-repo/semantics/article
URL
https://ruc.udc.es/dspace/bitstream/2183/86/1/Management_strategies_sustainable_invertebrate_fisheries%2520%28Aquat_Ecol%29.pdf
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URL
https://ruc.udc.es/dspace/bitstream/2183/86/3/Management_strategies_sustainable_invertebrate_fisheries%2520%28Aquat_Ecol%29.pdf.txt
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oai:ruc.udc.es:2183/872018-10-04T09:28:13Zcom_2183_75com_2183_18428com_2183_4774col_2183_76
RUC. Repositorio da Universidade da Coruña
author
Freire, Juan
author
García Allut, Antonio
2005-10-28T10:35:53Z
2005-10-28T10:35:53Z
2000
Marine Policy, vol. 24, n. 5 (Sep. 2000), p. 375-384
0308-597X
http://hdl.handle.net/2183/87
Coastal ecosystems and artisanal fisheries show a great complexity due to the high number of human factors that infuence their
functioning and to the number of components involved in the fishing activity. Moreover, a great number of stocks exploited by coastal
artisanal fisheries are invertebrates with a strong and persistent spatial structure and a population dynamics that do not fit the finfish
models. The present state of the artisanal coastal fisheries in Galicia (NW Spain) is analyzed, presenting di!erent symptoms of
a general state of overexploitation derived from the mismatch between management (derived from models designed for industrial
finfisheries) and the biological and socioeconomic context. We propose to modify the strategies of research to use inexpensive and
rapid methodologies and introduce the fishers' ecological knowledge. A new management policy is outlined based in the establishment
of territorial users' rights, the involvement of fishers in the assessment and management process, and the use of protected areas
and minimum sizes as key regulation tools
eng
Artisanal fisheries
Assessment
Management
Socioeconomics
Population dynamics
Coastal ecosystems
Invertebrate
Socioeconomic and biological causes of management failures in
European artisanal fisheries: the case of Galicia (NW Spain)
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/87/1/Management_failures_artisanal_fisheries%2520%28Mar_Pol%29.pdf
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URL
http://ruc.udc.es/dspace/bitstream/2183/87/3/Management_failures_artisanal_fisheries%2520%28Mar_Pol%29.pdf.txt
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oai:ruc.udc.es:2183/882018-05-10T15:07:58Zcom_2183_75com_2183_18428com_2183_4774col_2183_76
RUC. Repositorio da Universidade da Coruña
author
Freire, Juan
2005-10-28T10:35:57Z
2005-10-28T10:35:57Z
2001
Ecologista, n. 24, p. 46-50
http://hdl.handle.net/2183/88
spa
Pesca y ecosistemas marinos
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/88/1/Pesca_y_ecosistemas_marinos%2520%28El_Ecologista%29.pdf
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Pesca_y_ecosistemas_marinos%20(El_Ecologista).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/88/3/Pesca_y_ecosistemas_marinos%2520%28El_Ecologista%29.pdf.txt
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oai:ruc.udc.es:2183/892018-05-10T15:07:58Zcom_2183_75com_2183_18428com_2183_4774col_2183_76
RUC. Repositorio da Universidade da Coruña
author
Tully, Oliver
author
Freire, Juan
author
Addison, Julian
2005-10-28T10:36:03Z
2005-10-28T10:36:03Z
2003
Fisheries Research, vol. 65 (2003), n. 1-3, p. 1–2
http://hdl.handle.net/2183/89
eng
Crustacean fisheries
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/89/1/Crustacean_fisheries%2520%28Fish_Res_2003%29.pdf
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Crustacean_fisheries%20(Fish_Res_2003).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/89/3/Crustacean_fisheries%2520%28Fish_Res_2003%29.pdf.txt
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oai:ruc.udc.es:2183/902021-06-09T11:18:05Zcom_2183_75com_2183_18428com_2183_4774col_2183_76
RUC. Repositorio da Universidade da Coruña
author
Molares Vila, José
author
Freire, Juan
2005-10-28T10:36:07Z
2005-10-28T10:36:07Z
2003
Fisheries Research, vol. 65 (2003), n. 1-3, p. 485–492
http://hdl.handle.net/2183/90
[Abstract] The goose barnacle, "Pollicipes pollicipes", is an intertidal cirripede that lives attached to rocks on very exposed shores, forming
dense aggregations. It occurs in the northeast Atlantic (from 48 to 14◦N). Commercial fisheries have been developed in several
countries, but except for a short-lived local consumption, most of the production is traded in the Spanish market, where the
price can reach ?80/kg in first-sale auctions. This species shows a strong spatial structure, constituting metapopulations with
local adult populations sharing a common larval pool. Advection of larvae depends largely of oceanographic conditions that
govern larval transport and survival. In Galicia (NW Spain), the regional government regulations promote a co-management
system between fishers’ organisations (“cofradías”) and the fisheries authority through territorial user rights for fishing
(TURFs). Since 1992, the exploitation is granted to “cofradías” after presentation of an annual plan of exploitation and
management, where fishing (daily allocation of effort, maximum individual quotas and area of exploitation), surveillance
and the commercialisation processes are established. The recent implementation of a geographic information system (GIS)
designed for the management of Pollicipes in Galicia will allow for new ways to improve the elaboration and control of
management plans by fishers’ organisations using a combination of the available statistical data and computer-based methods.
The system, including databases and software for the visualisation of geographic information, was designed for independent
use in each “cofradía” or in a network, and its results are accessible in a web site (http://sigremar.cesga.es)
eng
Fisheries co-management
Geographical information system
Goose barnacle
Territorial user rights for fishing
Development and Perspectives for Community-Based Management of the Goose Barnacle (Pollicipes Pollicipes) Fisheries in Galicia (NW Spain)
info:eu-repo/semantics/article
URL
https://ruc.udc.es/dspace/bitstream/2183/90/1/Community_based_management_barnacle_fisheries%2520%28Fish%2520Res%25202003%29.pdf
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URL
https://ruc.udc.es/dspace/bitstream/2183/90/3/Community_based_management_barnacle_fisheries%2520%28Fish%2520Res%25202003%29.pdf.txt
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oai:ruc.udc.es:2183/912018-05-10T15:07:58Zcom_2183_75com_2183_18428com_2183_4774col_2183_76
RUC. Repositorio da Universidade da Coruña
author
Freire, Juan
author
Fernández, Luis
author
Muiño, Ramón
2005-10-28T10:36:10Z
2005-10-28T10:36:10Z
2005
0308-597X
http://hdl.handle.net/2183/91
The role of the Spanish scientific community in the initial assessment of the environmental and socioeconomic damages caused by
the Prestige oil spill is analysed. A discussion of the reasons for the failures in the response of the scientific community is presented,
highlighting that despite the existence of adequate human capital and infrastructures, failures were related to the weakness of the
structures and organisational capacity of the scientific institutions and the public administration. Some developments for an
effective response to future catastrophes are proposed: (1) oceanographic and ecological models, including scientific and local
knowledge; (2) management systems for scientific information; (3) organisational and incentive systems to allow the creation of
temporary, large and well-organised multidisciplinary teams; (4) protocols for rapid, ‘‘real-time’’, damage assessments; and (5)
participation of different social groups (NGOs, fishers’ organisations, aquaculture industry or volunteer groups) in plans for the
assessment and management of crises
eng
Oil spills
Scientific response
Crisis management
Damage assessment
Marine ecosystems
Role of the Spanish scientific community in the initial assessment and
management of the environmental damages caused by the "Prestige" oil spill
info:eu-repo/semantics/preprint
URL
http://ruc.udc.es/dspace/bitstream/2183/91/1/Response%2520scientific%2520community%2520to%2520Prestige%2520oil%2520spill%2520%28Marine%2520Policy%25202005%2520in%2520press%29.pdf
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URL
http://ruc.udc.es/dspace/bitstream/2183/91/3/Response%2520scientific%2520community%2520to%2520Prestige%2520oil%2520spill%2520%28Marine%2520Policy%25202005%2520in%2520press%29.pdf.txt
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Response%20scientific%20community%20to%20Prestige%20oil%20spill%20(Marine%20Policy%202005%20in%20press).pdf.txt
oai:ruc.udc.es:2183/922018-10-10T11:20:00Zcom_2183_75com_2183_18428com_2183_4774col_2183_76
RUC. Repositorio da Universidade da Coruña
author
Franco-Gordo, María del Carmen
author
Godínez Domínguez, Enrique
author
Filonov, Anatoliy E.
author
Tereshchenko, Irina E.
author
Freire, Juan
2005-10-28T10:36:17Z
2005-10-28T10:36:17Z
2004
Progress in oceanography, vol. 63, n. 3 (Nov. 2004), p. 99-123
http://hdl.handle.net/2183/92
The temporal and spatial distributions of zooplankton biomass and larval fish recorded during 27 months (December
1995–December 1998) off the Pacific coast of central México are analyzed. A total of 316 samples were obtained by surface
(from 40–68 to 0 m) oblique hauls at 12 sampling sites using a Bongo net. Two well-defined periods were observed: a
pre-ENSO period (December 1995–march 1997) and an ENSO event (July 1997–September 1998) characterized by
impoverishment of the pelagic habitat. The highest biomass concentrations occurred at coastal stations during the
pre-ENSO period. During the El Nin˜o period no spatial patterns were found in coastal waters. The months with highest
biomass were those in which the lowest sea surface temperature (SST) occurred (January–May), and this pattern was also
observed during the ENSO period. A typical, although attenuated, seasonal environmental pattern with enhanced phytoplankton
(diatoms and dinoflagellates) was prevalent during the El Nin˜o event in nearshore waters. During the El Niño
period the phytoplankton was mainly small diatoms (microphytoplankton), while dinoflagellates were practically absent.
The most parsimonious generalized linear models explaining spatial and temporal distribution of larval fish species
included the ENSO index (MEI), upwelling index (UI) and distance to the coast. The environmental variability defined
on an interannual time-scale by the ENSO event and the seasonal hydroclimatic pattern defined by the UI (intra-annualscale)
controlled the ecosystem productivity patterns. The small-scale distribution patterns (defined by a cross-shore gradient)
of plankton were related to the hydroclimatic seasonality and modulated by interannual anomalies
spa
Mexican central Pacific
Inshore phytoplankton
Zooplankton
Larval fish assemblages
El Niño
Plankton biomass and larval fish abundance prior to and
during the El Niño period of 1997–1998 along the central Pacific coast of México
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/92/1/Plankton%2520and%2520larval%2520fish%2520dynamics%2520%28Proc.%2520Oceanogr.%25202004%29.pdf
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Plankton%20and%20larval%20fish%20dynamics%20(Proc.%20Oceanogr.%202004).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/92/3/Plankton%2520and%2520larval%2520fish%2520dynamics%2520%28Proc.%2520Oceanogr.%25202004%29.pdf.txt
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Plankton%20and%20larval%20fish%20dynamics%20(Proc.%20Oceanogr.%202004).pdf.txt
oai:ruc.udc.es:2183/932016-06-28T10:20:02Zcom_2183_75com_2183_18428com_2183_4774col_2183_76
RUC. Repositorio da Universidade da Coruña
author
García Allut, Antonio
2005-10-28T10:36:21Z
2005-10-28T10:36:21Z
2003
RUBIO ARDANAZ, Juan Antonio ... [et al.]. La pesca y el mar : cambio sociocultural y económico. Donosti : Eusko Ikanskuntza, 2003 (Zainak, Cuadernos de antropología, 21)
84-8419-879-0
1137-439X
http://hdl.handle.net/2183/93
La pesca artesanal en Galicia tiene una enorme importancia social, económica y
cultural. No obstante, en ella se dan una serie de problemáticas de carácter estructural
que la hacen vulnerable. La situación de la comercialización de los productos pesqueros
de la pesca artesanal agrava los problemas anteriores desestructurando al sector,
perjudicando a los pescadores y a la viabilidad futura de sus órganos de gestión
(Cofradías). En esta ponencia se presenta una solución que hasta la fecha ha corregido y
mejorado este estado de cosas mediante la puesta en marcha de una iniciativa
empresarial pensada para minimizar estos problemas. Esta iniciativa se llama Lonxanet
y en la que seis cofradías gallegas están integradas actualmente.
spa
Pesca artesanal
Cofradías de pescadores
Ineficiencias de la comercialización
Modelo Lonxanet
La pesca artesanal gallega y el problema de la comercialización : ¿"Lonxanet.com" como una alternativa?
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/93/1/Pesca%2520artesanal%2520y%2520comercializacion%2520%28Cuad.%2520Antrop.%25202003%29.pdf
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Pesca%20artesanal%20y%20comercializacion%20(Cuad.%20Antrop.%202003).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/93/3/Pesca%2520artesanal%2520y%2520comercializacion%2520%28Cuad.%2520Antrop.%25202003%29.pdf.txt
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Pesca%20artesanal%20y%20comercializacion%20(Cuad.%20Antrop.%202003).pdf.txt
oai:ruc.udc.es:2183/942018-08-08T09:05:59Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
Freire, Juan
2005-10-28T11:09:06Z
2005-10-28T11:09:06Z
2000
http://hdl.handle.net/2183/94
spa
Recursos marinos y amenazas
para la diversidad del mar
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/94/1/Recursos_diversidad_marina.pdf
File
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Recursos_diversidad_marina.pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/94/3/Recursos_diversidad_marina.pdf.txt
File
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Recursos_diversidad_marina.pdf.txt
oai:ruc.udc.es:2183/952018-05-10T15:06:31Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
Franco-Gordo, María del Carmen
author
Godínez Domínguez, Enrique
author
Freire, Juan
2005-10-28T11:09:11Z
2005-10-28T11:09:11Z
2003
http://hdl.handle.net/2183/95
eng
Zooplankton biomass and larval fish abundance during normal year and El Niño periods (1995-1998) in the central Pacific coast of Mexico
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/95/1/Plankton_fish_larvae_during_normal_%2520and_%2520El_Ni%25F1o_years%2520%28Gijon%2520May%25202003%29.pdf
File
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application/pdf
Plankton_fish_larvae_during_normal_%20and_%20El_Ni%F1o_years%20(Gijon%20May%202003).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/95/3/Plankton_fish_larvae_during_normal_%2520and_%2520El_Ni%25F1o_years%2520%28Gijon%2520May%25202003%29.pdf.txt
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Plankton_fish_larvae_during_normal_%20and_%20El_Ni%F1o_years%20(Gijon%20May%202003).pdf.txt
oai:ruc.udc.es:2183/962018-05-10T15:06:31Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
Pallas Lozano, Alicia
author
García Calvo, Beatriz
author
Corgos López-Prado, Antonio
author
Freire, Juan
author
Godínez Domínguez, Enrique
author
Bernárdez Martí, Cristina
author
Sampedro Pastor, María Paz
2005-10-28T11:09:15Z
2005-10-28T11:09:15Z
2003
http://hdl.handle.net/2183/96
eng
Habitat diversity and postlarval benthic decapod crustacean assemblages in shallow
waters of the Ría de A Coruña (NW Spain)
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/96/1/Habitat_diversity_postlarval_decapods%2520%28poster%252038%2520EMBS%29.pdf
File
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Habitat_diversity_postlarval_decapods%20(poster%2038%20EMBS).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/96/3/Habitat_diversity_postlarval_decapods%2520%28poster%252038%2520EMBS%29.pdf.txt
File
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Habitat_diversity_postlarval_decapods%20(poster%2038%20EMBS).pdf.txt
oai:ruc.udc.es:2183/972018-05-10T15:06:31Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
Franco-Gordo, María del Carmen
author
Godínez Domínguez, Enrique
author
Rojo Vázquez, Jorge Arturo
author
Freire, Juan
2005-10-28T11:09:20Z
2005-10-28T11:09:20Z
2003
http://hdl.handle.net/2183/97
eng
Effects of the 1997-1998 ENSO event in the eastern tropical
Pacific coastal ecosystem
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/97/1/ENSO%2520event%2520in%2520coastal%2520ecosystems%2520%28poster%252038%2520EMBS%29.pdf
File
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ENSO%20event%20in%20coastal%20ecosystems%20(poster%2038%20EMBS).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/97/3/ENSO%2520event%2520in%2520coastal%2520ecosystems%2520%28poster%252038%2520EMBS%29.pdf.txt
File
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ENSO%20event%20in%20coastal%20ecosystems%20(poster%2038%20EMBS).pdf.txt
oai:ruc.udc.es:2183/982021-06-04T12:38:00Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
Carabel Chans, Sirka
author
Verísimo Amor, Patricia
author
Bernárdez Martí, Cristina
author
Freire, Juan
author
Fernández, Luis
2005-10-28T11:09:25Z
2005-10-28T11:09:25Z
2003
http://hdl.handle.net/2183/98
eng
Complex Patterns of Habitat Use by Spider Crabs Maja Squinado Revealed by Stable Isotope Analyses
info:eu-repo/semantics/conferenceObject
URL
https://ruc.udc.es/dspace/bitstream/2183/98/1/Habitat%2520use%2520Maja%2520squinado%2520%28poster%252038%2520EMBS%29.pdf
File
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application/pdf
Habitat%20use%20Maja%20squinado%20(poster%2038%20EMBS).pdf
URL
https://ruc.udc.es/dspace/bitstream/2183/98/3/Habitat%2520use%2520Maja%2520squinado%2520%28poster%252038%2520EMBS%29.pdf.txt
File
MD5
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text/plain
Habitat%20use%20Maja%20squinado%20(poster%2038%20EMBS).pdf.txt
oai:ruc.udc.es:2183/992021-06-09T11:46:11Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
Álvarez-Fernández, Inmaculada
author
Sardá Amills, Francesc
author
Rotllant Estelrich, Guiomar
author
Verísimo Amor, Patricia
author
Fernández, Luis
2005-10-28T11:09:30Z
2005-10-28T11:09:30Z
2005
http://hdl.handle.net/2183/99
eng
Role of Lipid, Protein, Carbohydrate and Nucleic Acid As Indicators of the Moulting Cycle of Norway Lobster (Nephrops norvegicus)
info:eu-repo/semantics/conferenceObject
URL
https://ruc.udc.es/dspace/bitstream/2183/99/1/Indicators%2520moulting%2520cycle%2520Nephrops%2520%28Poster%2C%2520ASLO%2520Summer%2520Meeting%2520Jun%25202005%29.pdf
File
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application/pdf
Indicators%20moulting%20cycle%20Nephrops%20(Poster,%20ASLO%20Summer%20Meeting%20Jun%202005).pdf
URL
https://ruc.udc.es/dspace/bitstream/2183/99/3/Indicators%2520moulting%2520cycle%2520Nephrops%2520%28Poster%2C%2520ASLO%2520Summer%2520Meeting%2520Jun%25202005%29.pdf.txt
File
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text/plain
Indicators%20moulting%20cycle%20Nephrops%20(Poster,%20ASLO%20Summer%20Meeting%20Jun%202005).pdf.txt
oai:ruc.udc.es:2183/1002018-05-10T14:59:17Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
Freire, Juan
author
Corgos López-Prado, Antonio
author
Bernárdez Martí, Cristina
author
Fernández, Luis
author
García Allut, Antonio
author
González-Gurriarán, Eduardo
author
Verísimo Amor, Patricia
2005-10-28T11:09:38Z
2005-10-28T11:09:38Z
2001
http://hdl.handle.net/2183/100
eng
Metapopulation dynamics in the spider crab "Maja squinado" : implications for fisheries management
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/100/1/Metapopulation_dynamics_Maja%2520%28EDFAM%29.pdf
File
MD5
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application/pdf
Metapopulation_dynamics_Maja%20(EDFAM).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/100/3/Metapopulation_dynamics_Maja%2520%28EDFAM%29.pdf.txt
File
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Metapopulation_dynamics_Maja%20(EDFAM).pdf.txt
oai:ruc.udc.es:2183/1012018-05-10T15:06:31Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
Corgos López-Prado, Antonio
author
Bernárdez Martí, Cristina
author
Verísimo Amor, Patricia
author
Freire, Juan
2005-10-28T11:09:41Z
2005-10-28T11:09:41Z
2002
http://hdl.handle.net/2183/101
eng
Population dynamics of "Maja squinado" in the Ría de A Coruña
(Galicia, NW Spain), using mark-recapture experiments
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/101/1/Population_dynamics_mark_recapture_Maja%2520%288CCDM_Corfu_2002%29.pdf
File
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application/pdf
Population_dynamics_mark_recapture_Maja%20(8CCDM_Corfu_2002).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/101/3/Population_dynamics_mark_recapture_Maja%2520%288CCDM_Corfu_2002%29.pdf.txt
File
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Population_dynamics_mark_recapture_Maja%20(8CCDM_Corfu_2002).pdf.txt
oai:ruc.udc.es:2183/1022018-05-10T15:06:31Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
Corgos López-Prado, Antonio
author
Sánchez Carnero, Noela
author
Freire, Juan
2005-10-28T11:09:46Z
2005-10-28T11:09:46Z
2005
http://hdl.handle.net/2183/102
eng
Dynamics of the small-scale spatial structure of a local population of the spider
crab, "Maja brachydactyla"
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/102/1/Spatial%2520dynamics%2520Maja%2520%28poster%2520ICC6%2520Glasgow%25202005%29.pdf
File
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application/pdf
Spatial%20dynamics%20Maja%20(poster%20ICC6%20Glasgow%202005).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/102/3/Spatial%2520dynamics%2520Maja%2520%28poster%2520ICC6%2520Glasgow%25202005%29.pdf.txt
File
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Spatial%20dynamics%20Maja%20(poster%20ICC6%20Glasgow%202005).pdf.txt
oai:ruc.udc.es:2183/1032018-10-19T06:33:58Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
Freire, Juan
author
García Allut, Antonio
2005-10-28T11:09:53Z
2005-10-28T11:09:53Z
1999
ICES Annual Science Conference, Theme Session on Evaluation of Complete Fisheries Systems : Economic, Social and Ecological Analyses : Stockholm, Sweden, 1999
http://hdl.handle.net/2183/103
The fisheries crisis of the last decades and the overexploitation of a great number of stocks have revealed that the scientific knowledge available about the dynamics of the marine ecosystems and needed for the management of the fisheries is inadequate. This problem is critical when the management of coastal ecosystems and artisanal fisheries is involved. These systems show a great complexity due to the high number of human factors that influence their functioning (related
directly to the exploitation of fisheries resources, but also to other types of activities that originate modifications and destruction of habitats) and to the number of components involved in the fishing
activity (usually multispecific, multigear, with a diversified fleet that shows a complex spatial pattern of activity). Moreover, a great number of stocks exploited by coastal artisanal fisheries are invertebrates with a population dynamics that no fits in the finfish models. The efficient and sustainable management of these resources is in general not possible using models designed to finfish stocks exploited by industrial fleets. We analyze the present state of the coastal fisheries in Galicia (NW Spain), paying special attention
to the state of the art of the scientific knowledge available, the socioeconomical context, and to the management policies in use. In this sense, the main problems of the present policy directed to the
achievement of scientific data and to the management of resources will be identified. We propose to modify the strategies of research in the fishery sciences to introduce the traditional ecological
knowledge of the fishers in the management process. This kind of information should constitute a
complimentary source to get new knowledge, and for this goal we propose to process it using the mechanisms and tools of the Artificial Inteligence to formalize, objectify and integrate it in the fisheries biology and marine ecology. Some case studies based in this approach will be presented.
eng
Integration of fishers’ ecological knowledge in fisheries biology and
management : a proposal for the case of the artisanal coastal fisheries of Galicia
(NW Spain)
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/103/1/FEK_fisheries_biology%2520%281999_ICES_ASC%29.pdf
File
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FEK_fisheries_biology%20(1999_ICES_ASC).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/103/3/FEK_fisheries_biology%2520%281999_ICES_ASC%29.pdf.txt
File
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FEK_fisheries_biology%20(1999_ICES_ASC).pdf.txt
oai:ruc.udc.es:2183/1042018-10-19T06:35:00Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
Barreiro García, Álvaro
author
Losada Carril, David Enrique
author
García Allut, Antonio
author
Freire, Juan
2005-10-28T11:09:57Z
2005-10-28T11:09:57Z
2000
CORTÉS, U., SÁNCHEZ-MARRE, M. BESAI 2000 - Workshop on Binding Environmental Sciences
and Artificial Intelligence : August 21, 2000, Berlin, Germany
http://hdl.handle.net/2183/104
[Abstract] The aim of this paper is to show the role that Knowledge Representation can play in the research of artisanal fisheries. In particular we concentrate on the epistemological and technological
adequacy of implementations of Description Logics to represent
fishers’ ecological knowledge, so contributing to address some open
methodological questions about its collection and use
eng
Fishers’ ecological knowledge
Knowledge representation
Description logics
Using description logics to integrate fishers' ecological knowledge in the research of artisanal fisheries
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/104/1/BESAI2000.pdf
File
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BESAI2000.pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/104/3/BESAI2000.pdf.txt
File
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BESAI2000.pdf.txt
oai:ruc.udc.es:2183/1052018-08-13T09:32:56Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
García Allut, Antonio
author
Freire, Juan
2005-10-28T11:10:01Z
2005-10-28T11:10:01Z
2001
Dans, Enrique
http://hdl.handle.net/2183/105
spa
Gestión de pesquerías, gestión de mercados : ¿es el comercio electrónico una solución?
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/105/1/Comercio_electronico_gestion_pesquerias.pdf
File
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Comercio_electronico_gestion_pesquerias.pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/105/3/Comercio_electronico_gestion_pesquerias.pdf.txt
File
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Comercio_electronico_gestion_pesquerias.pdf.txt
oai:ruc.udc.es:2183/1062018-10-04T09:23:05Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
Freire, Juan
2005-10-28T11:10:08Z
2005-10-28T11:10:08Z
2001
http://hdl.handle.net/2183/106
spa
¿Cómo puede la biología
pesquera ayudar en la gestión
de las pesquerías artensales?
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/106/1/Gestion_pesquerias_artesanales%2520%28Baiona_Nov_2001%29.pdf
File
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Gestion_pesquerias_artesanales%20(Baiona_Nov_2001).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/106/3/Gestion_pesquerias_artesanales%2520%28Baiona_Nov_2001%29.pdf.txt
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oai:ruc.udc.es:2183/1072018-10-19T06:36:05Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
Dans, Enrique
author
Freire, Juan
2005-10-28T11:10:11Z
2005-10-28T11:10:11Z
2002
APPLEGATE, L., GALLIERS, R. and DeGROSS, J. I. (eds.). Proceedings of the Twenty-Third International Conference on Information Systems, December 15-18, 2002, Barcelona (Spain). Atlanta, USA : Association for Information Systems, 2002
http://hdl.handle.net/2183/107
[Abstract] Information technologies (IT) can be used as an agent to foster social change. This case study describes an
Internet start-up, Lonxanet, and analyzes its potential role as a catalyst of changes in the Galician (northwest
Spain) artisanal seafood fisheries. These fisheries are traditionally associated to rural communities of fishers,
selling their products in local auction markets known as lonxas. Galician seafood is hugely appreciated in the
Spanish market, where products achieve very high prices and have luxurious connotations. However, the
product passes through a wide array of intermediaries where lack of transparence prevails until it reaches the
end market, so fishers achieve just a tiny amount of the potential profits despite assuming all the risks
associated to the extractive phase. In order to foster social and economic change, Lonxanet proposes a large
electronic marketplace initiative partially owned by fishers' organizations, integrating marketing and logistic
services and selling directly to restaurants and other final consumers. This change enables fishers to exert
control over the whole commercial cycle. Consequently, they switch from a survival mentality to an industrial
one, and they become especially interested in the sustainability of the resource, thus achieving environmental
benefits.
eng
Internet
Social change
Marketplaces
Fishing industry
Markets
Electronic commerce
IT as agent of social change : "Lonxanet" and the case of the galician artisanal fisheries
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/107/1/IT_social_change_Lonxanet%2520%28ICIS%29.pdf
File
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IT_social_change_Lonxanet%20(ICIS).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/107/3/IT_social_change_Lonxanet%2520%28ICIS%29.pdf.txt
File
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IT_social_change_Lonxanet%20(ICIS).pdf.txt
oai:ruc.udc.es:2183/1082018-10-19T06:36:49Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
García Allut, Antonio
author
Freire, Juan
2005-10-28T11:10:15Z
2005-10-28T11:10:15Z
2002
Andar o mar : II Xornadas Internacionais de Cultura Tradicional. [Carnota] : Asociación Canle de Lira, [2002], p. 151-178
84-607-4974-6
http://hdl.handle.net/2183/108
[Resumen] En este trabajo se hace una presentación descriptiva acerca de cómo una
serie de factores mediombientales, socioeconómicos y políticos inciden sobre la
actividad pesquera en Galicia. La finalidad es subrayar cómo algunos de estos "azares
ambientales" constituyen una fuente de incertidumbre (problemas) para el desarrollo
de la actividad pesquera afectando de modo especial a los procesos productivos menos
capitalizados. Finalmente, a modo de ejemplificación, nos centraremos en la
comercialización de los productos pesqueros en "primera venta" y sus problemas,
mostrando algunas de las respuestas que dan los pescadores artesanales en el ámbito
del mercado.
spa
Procesos de producción pesquera e incertidumbre : la comercialización de los productos pesqueros en la pesca artesanal de
Galicia
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/108/1/Procesos_produccion_pesquera_incertidumbre%2520%28Andar%2520ao%2520Mar%25202002%29.pdf
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Procesos_produccion_pesquera_incertidumbre%20(Andar%20ao%20Mar%202002).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/108/3/Procesos_produccion_pesquera_incertidumbre%2520%28Andar%2520ao%2520Mar%25202002%29.pdf.txt
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Procesos_produccion_pesquera_incertidumbre%20(Andar%20ao%20Mar%202002).pdf.txt
oai:ruc.udc.es:2183/1092018-10-19T06:37:41Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
García Allut, Antonio
author
Freire, Juan
author
Barreiro García, Álvaro
author
Losada Carril, David Enrique
2005-10-28T11:10:19Z
2005-10-28T11:10:19Z
2003
HAGGAN, N., BRIGNALL, C. and WOOD, L. (eds). Putting fishers' knowledge to work. Vancouver, Canada : Fisheries Centre Research Report, University of British Columbia, 2003, vol. 11 (1), p. 227-237
http://hdl.handle.net/2183/109
[abstract] The fisheries crisis of the last decades and the overexploitation of a great number of stocks (FAO 1995) have been due mainly to the inadequacy of scientific knowledge, uncertainties in assessments and/or failures of the management systems. These problems are critical when the management of coastal ecosystems and artisanal fisheries is involved. These systems possess great complexity due to the high number of human factors that influence their functioning and the fishing activity. Small-scale coastal fisheries have a much greater social significance than offshore industrial fisheries, despite the larger economical importance of the latter (only in macro-economic terms). The artisanal coastal fisheries in Galicia (NW Spain) are in a general state of overexploitation derived from the mismatch between management (derived implicitly from models designed for industrial finfisheries) and the biological and socioeconomic context. Freire and García-Allut (2000) proposed a new management policy (based on the establishment of territorial users’ rights, the involvement of fishers in the assessment and management process in collaboration with the government agencies, and the use of protected areas and minimum landing sizes as key regulations) to solve the above problems. As well as a new management system, research should pay special attention to the design and use of inexpensive and rapid methodologies to get relevant scientific data, and introduce local or traditional ecological knowledge of the fishers to the assessment and management process. In this paper, we analyze the values and characteristics of fishers’ ecological knowledge (FEK). Using the artisanal coastal fisheries of Galicia as a case study, we present the objectives of the integration of FEK in fisheries biology and management and propose a methodology for that goal. The use of Artificial Intelligence (AI) as a tool for the analysis and integration of FEK is discussed, and the role of Knowledge Representation, a branch of AI, is described to show the epistemological and technological adequacy of the chosen languages and tools in a non-computer science forum
eng
Methodology for integration of fisher's ecological knowledge in fisheries biology and management using knowledge representation (artificial intelligence)
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/109/1/Methodology_integration_FEK_in_fisheries_biology%2520%28FCRR%29.pdf
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Methodology_integration_FEK_in_fisheries_biology%20(FCRR).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/109/3/Methodology_integration_FEK_in_fisheries_biology%2520%28FCRR%29.pdf.txt
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oai:ruc.udc.es:2183/1102018-05-10T15:06:32Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
Molares Vila, José
author
Freire, Juan
2005-10-28T11:10:26Z
2005-10-28T11:10:26Z
2001
International Conference "Life Histories, Assessment and Management of Crustacean Fisheries" (2001, A Coruña)
http://hdl.handle.net/2183/110
eng
Fisheries and management perspectives of the goose barnacle "Pollicipes pollicipes" of Galicia (NW Spain)
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/110/1/Fisheries_management_barnacle%2520%28EDFAM%29.pdf
File
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Fisheries_management_barnacle%20(EDFAM).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/110/3/Fisheries_management_barnacle%2520%28EDFAM%29.pdf.txt
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Fisheries_management_barnacle%20(EDFAM).pdf.txt
oai:ruc.udc.es:2183/1112018-07-03T09:17:54Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
Godínez Domínguez, Enrique
author
Franco-Gordo, María del Carmen
author
Lucano Ramírez, Gabriela
author
Ruíz Ramírez, Salvador
author
Rojo Vázquez, Jorge Arturo
author
Freire, Juan
2005-10-28T11:10:29Z
2005-10-28T11:10:29Z
2004
PICES Annual Meeting (13th, 2004, Hawaii, USA)
http://hdl.handle.net/2183/111
eng
Main effects of the 1997-1998 ENSO event in the tropical
coastal ecosystem in the Mexican central Pacific
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/111/1/Effects_El_Ni%25F1o_coastal_ecosystem_tropical_Pacific%2520%28poster%2520PICES%2520Hawaii%2520Oct%25202004%29.pdf
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Effects_El_Ni%F1o_coastal_ecosystem_tropical_Pacific%20(poster%20PICES%20Hawaii%20Oct%202004).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/111/3/Effects_El_Ni%25F1o_coastal_ecosystem_tropical_Pacific%2520%28poster%2520PICES%2520Hawaii%2520Oct%25202004%29.pdf.txt
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Effects_El_Ni%F1o_coastal_ecosystem_tropical_Pacific%20(poster%20PICES%20Hawaii%20Oct%202004).pdf.txt
oai:ruc.udc.es:2183/1122018-10-04T09:24:17Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
Freire, Juan
2005-10-28T11:10:33Z
2005-10-28T11:10:33Z
2000
http://hdl.handle.net/2183/112
spa
Dinámica de poblaciones y gestión de pesquerías costeras : el caso gallego
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/112/1/Dinamica_poblaciones_gestion_pesquerias%2520%28CIMA%25202000%29%2520.pdf
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Dinamica_poblaciones_gestion_pesquerias%20(CIMA%202000)%20.pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/112/3/Dinamica_poblaciones_gestion_pesquerias%2520%28CIMA%25202000%29%2520.pdf.txt
File
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Dinamica_poblaciones_gestion_pesquerias%20(CIMA%202000)%20.pdf.txt
oai:ruc.udc.es:2183/1132018-05-10T15:06:32Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
Freire, Juan
2005-10-28T11:10:40Z
2005-10-28T11:10:40Z
2002
Galiza e o Mar. Xornadas sobre Pesca Responsabel e Medio Ambiente Litoral, novembro 2002
http://hdl.handle.net/2183/113
spa
Gestión sostenible de la pesca
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/113/1/Gestion_sostenible_pesca%2520%28ADEGA%2C%2520Nov%25202002%29.pdf
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Gestion_sostenible_pesca%20(ADEGA,%20Nov%202002).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/113/3/Gestion_sostenible_pesca%2520%28ADEGA%2C%2520Nov%25202002%29.pdf.txt
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oai:ruc.udc.es:2183/1142018-10-04T09:25:54Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
Freire, Juan
2005-10-28T11:10:43Z
2005-10-28T11:10:43Z
2003
http://hdl.handle.net/2183/114
spa
Áreas marítimas protegidas como herramienta de gestión pesquera
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/114/1/AMPs%2520y%2520gesti%25F3n%2520pesquera.pdf
File
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AMPs%20y%20gesti%F3n%20pesquera.pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/114/3/AMPs%2520y%2520gesti%25F3n%2520pesquera.pdf.txt
File
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AMPs%20y%20gesti%F3n%20pesquera.pdf.txt
oai:ruc.udc.es:2183/1152018-10-04T09:26:15Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
Freire, Juan
2005-10-28T11:10:47Z
2005-10-28T11:10:47Z
2003
http://hdl.handle.net/2183/115
spa
Pesca responsable : innovación para la sostenibilidad
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/115/1/Pesca_responsable%2520%28Bueu%2520Oct%25202003%29.pdf
File
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Pesca_responsable%20(Bueu%20Oct%202003).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/115/3/Pesca_responsable%2520%28Bueu%2520Oct%25202003%29.pdf.txt
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Pesca_responsable%20(Bueu%20Oct%202003).pdf.txt
oai:ruc.udc.es:2183/1162018-08-21T07:37:14Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
Freire, Juan
2005-10-28T11:10:53Z
2005-10-28T11:10:53Z
2005
http://hdl.handle.net/2183/116
spa
¿Cómo mejorar la gestión y explotación de los recursos marisqueros de la Ría de Pontevedra?
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/116/1/Taller_Marisqueo_Ria_Pontevedra%2520%28Mayo%25202005%29.pdf
File
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Taller_Marisqueo_Ria_Pontevedra%20(Mayo%202005).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/116/3/Taller_Marisqueo_Ria_Pontevedra%2520%28Mayo%25202005%29.pdf.txt
File
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Taller_Marisqueo_Ria_Pontevedra%20(Mayo%202005).pdf.txt
oai:ruc.udc.es:2183/1172018-06-21T08:07:56Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
Freire, Juan
2005-10-28T11:10:57Z
2005-10-28T11:10:57Z
2005
http://hdl.handle.net/2183/117
spa
Estrategias de respuesta del sector pesquero a los proyectos de parques eólicos marinos
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/117/1/Estrategias_respuesta_parques_eolicos%2520%28Mayo%25202005%29.pdf
File
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Estrategias_respuesta_parques_eolicos%20(Mayo%202005).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/117/3/Estrategias_respuesta_parques_eolicos%2520%28Mayo%25202005%29.pdf.txt
File
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Estrategias_respuesta_parques_eolicos%20(Mayo%202005).pdf.txt
oai:ruc.udc.es:2183/1182018-05-31T11:33:38Zcom_2183_75com_2183_18428com_2183_4774col_2183_77
RUC. Repositorio da Universidade da Coruña
author
Freire, Juan
2005-10-28T11:11:03Z
2005-10-28T11:11:03Z
2003
http://hdl.handle.net/2183/118
spa
Impacto del Prestige sobre recursos pesqueros y marisqueros
info:eu-repo/semantics/conferenceObject
URL
http://ruc.udc.es/dspace/bitstream/2183/118/1/Impacto_Prestige_sobre_%2520recursos_pesqueros.pdf
File
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Impacto_Prestige_sobre_%20recursos_pesqueros.pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/118/3/Impacto_Prestige_sobre_%2520recursos_pesqueros.pdf.txt
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Impacto_Prestige_sobre_%20recursos_pesqueros.pdf.txt
oai:ruc.udc.es:2183/1192018-10-19T06:40:23Zcom_2183_75com_2183_18428com_2183_4774col_2183_78
RUC. Repositorio da Universidade da Coruña
author
Godínez Domínguez, Enrique
author
Freire, Juan
author
González Sansón, Gaspar
2005-10-28T11:12:01Z
2005-10-28T11:12:01Z
2002
http://hdl.handle.net/2183/119
[Abstract] We test predicted short-term structural changes in the macroinvertebrate
assemblages of a shrimp fishing ground in the tropical Mexican Pacific subject to
low effort with seasonal closures. During two years, five cruises were carried out
sampling seven sites and four depths (20, 40, 60 and 80 m) along 100 km of
coastline. A series of community structure descriptors were used to determine the
ecological effects of fishing disturbances: ABC curves, W-statistic, normalized
species size distribution as biomass spectra, spatial segregation index, Shannon-
Wiener diversity index, species richness and biomass. Theoretical predictions of the
effects of fishing on these indices were tested by comparisons of samples collected
from successive open and close fishing seasons. ABC curves show fishing has
produced a state of chronic disturbance in the macroinvertebrate community. Shortterm
effects could be masked by natural seasonal and interannual environmental
changes. Results of the analyses of short-term effects are not in agreement with the
fishing disturbance theories; only in 31% of the cases the results obtained of
comparisons between successive cruises to test the different hypotheses about the
effects of fishing were in agreement with theory. The temporal trend of increase of
the biomass and the decline of species richness, could evidence interannual effects.
The complexity of the sources of variability in a exploited community forces to focus
on temporal and spatial gradients to understand the community structural
processes
eng
Biomass spectra
Diversity
Fishing disturbance
Macroinvertebrate community structure
Dominance
Species-area curve
Spatial segregation
Shrimp
fisheries
Trawl
Tropical shelf ecosystems
Predicting changes to macrobenthic communities due to fishing disturbance in a shrimp fishing ground of the Mexican central Pacific
info:eu-repo/semantics/workingPaper
URL
http://ruc.udc.es/dspace/bitstream/2183/119/1/Fishing_disturbance_macrobenthic_community%2520%2810_02%29.pdf
File
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URL
http://ruc.udc.es/dspace/bitstream/2183/119/3/Fishing_disturbance_macrobenthic_community%2520%2810_02%29.pdf.txt
File
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oai:ruc.udc.es:2183/1202018-10-19T06:50:28Zcom_2183_75com_2183_18428com_2183_4774col_2183_78
RUC. Repositorio da Universidade da Coruña
author
Godínez Domínguez, Enrique
author
Freire, Juan
author
Franco-Gordo, María del Carmen
author
González Sansón, Gaspar
2005-10-28T11:12:06Z
2005-10-28T11:12:06Z
2002
http://hdl.handle.net/2183/120
[Abstract] 1. Nowadays, studies focused to test a well-defined set of a priori hypotheses about
spatial and temporal organization of assemblages in marine communities are scarce.
2. This study presents the first fully-developed application of a parsimonious approach
for model selection based on the Kullback-Leibler information theory using multivariate
data to determine the best spatial and temporal models among a set of a priori
alternative models of a soft bottom macroinvertebrate community in the tropical Pacific
continental shelf (from 10 to 90 m deep).
3. Besides of the determination of the most parsimonious model, the Akaike´s
information criterion allows the exploration of the scale-dependent patterns of
community organization and to determine hierarchical relations among the gradients
considered.
4. Depth the most conspicuous spatial gradient affecting macrofaunal assemblages,
and the main discontinuity is located between 40 and 60 m. The degree of exposure is
defined as a secondary gradient and it is only relevant in shallow waters.
5. Seasonal changes in the abundance along the bathymetric gradient of some
portunid crabs and shrimps defined a process of seasonal recomposition, caused by a
vertical shift of the community.
eng
Akaike's information criterion
Model selection
Benthic macroinvertebrate assemblage
Spatial patterns
Temporal patterns
Tropical continental shelf
Environmental gradients
Hydroclimatic seasonality
Hierarchical organization of spatial and temporal patterns of macrobenthic assemblages in the tropical Pacific continental shelf
info:eu-repo/semantics/workingPaper
URL
http://ruc.udc.es/dspace/bitstream/2183/120/1/Hierarchical_organization_asemblages%2520%2810_02%29.pdf
File
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Hierarchical_organization_asemblages%20(10_02).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/120/3/Hierarchical_organization_asemblages%2520%2810_02%29.pdf.txt
File
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oai:ruc.udc.es:2183/1212018-05-10T15:03:27Zcom_2183_75com_2183_18428com_2183_4774col_2183_78
RUC. Repositorio da Universidade da Coruña
author
Pallas Lozano, Alicia
author
García Calvo, Beatriz
author
Corgos López-Prado, Antonio
author
Freire, Juan
author
Godínez Domínguez, Enrique
author
Bernárdez Martí, Cristina
author
Sampedro Pastor, María Paz
2005-10-28T11:12:10Z
2005-10-28T11:12:10Z
2003
http://hdl.handle.net/2183/121
eng
Habitat diversity and postlarval benthic decapod crustacean assemblages in shallow
waters of the Ría de A Coruña (NW Spain)
info:eu-repo/semantics/workingPaper
URL
http://ruc.udc.es/dspace/bitstream/2183/121/1/Habitat_diversity_postlarval_decapods%2520%28WP%2520v.1%2520Sept%25202003%29.pdf
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URL
http://ruc.udc.es/dspace/bitstream/2183/121/3/Habitat_diversity_postlarval_decapods%2520%28WP%2520v.1%2520Sept%25202003%29.pdf.txt
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oai:ruc.udc.es:2183/1222018-10-19T06:58:29Zcom_2183_75com_2183_18428com_2183_4774col_2183_78
RUC. Repositorio da Universidade da Coruña
author
Corgos López-Prado, Antonio
author
Freire, Juan
author
Bernárdez Martí, Cristina
author
Fernández, Luis
author
Verísimo Amor, Patricia
2005-10-28T11:12:15Z
2005-10-28T11:12:15Z
2001
http://hdl.handle.net/2183/122
eng
Timing and seasonality of the onset of maturity, gonad maturation and
mating in the spider crab "Maja squinado" : relationships with habitat use and social structure
info:eu-repo/semantics/workingPaper
URL
http://ruc.udc.es/dspace/bitstream/2183/122/1/Timing_seasonality_reproduction_spider_crab%2520%285ICC%29.pdf
File
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URL
http://ruc.udc.es/dspace/bitstream/2183/122/3/Timing_seasonality_reproduction_spider_crab%2520%285ICC%29.pdf.txt
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oai:ruc.udc.es:2183/1232018-10-19T07:01:16Zcom_2183_75com_2183_18428com_2183_4774col_2183_78
RUC. Repositorio da Universidade da Coruña
author
Bernárdez Martí, Cristina
author
González-Gurriarán, Eduardo
author
García Calvo, Beatriz
author
Corgos López-Prado, Antonio
author
Freire, Juan
2005-10-28T11:12:19Z
2005-10-28T11:12:19Z
2003
http://hdl.handle.net/2183/123
[Abstract] In August 2002, 12 juvenile and 12 adult (recently terminal moulted) spider
crabs were tagged using ultrasonic pingers (Sonotronics, USA) in the Ría da
Coruña (NW Spain). Both adults and juveniles were released in the same sandy
shallow bottoms (5-10 m) in which they were caught. This area, as known from
previous studies, is a typical juvenile area where juvenile spider crabs carry out
their terminal moult before the autumn migration to deep bottoms.
The tracking was carried out daily for a period of two weeks, although not all the
crabs were located every day. Juvenile crabs were found to move small
distances, performing non-directional movements near the coast, in protected
areas up to 10 m deep. Two of the adult crabs performed small scale
movements in the outer (more exposed) part of the estuary, at depths of up to
20 m. The rest of the adult crabs remained in the juvenile area, performing the
same non-directional movements as the juveniles. Four male adult crabs were
recaptured by commercial fisheries in the following months, three of them at
more than 40 m deep, in the central channel of the estuary, probably while
performing their seasonal descent migration. A female carrying eggs was
recaptured in December near the coast, probably after carrying out both a
descent and ascent migration.
eng
Movements of juvenile and adult spider crab ("Maja squinado") in the Ría da
Coruña (NW Spain)
info:eu-repo/semantics/workingPaper
URL
http://ruc.udc.es/dspace/bitstream/2183/123/1/Movements_juvenile_adult_spider_crab%2520%28WP%2520Jun%25202003%29.pdf
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URL
http://ruc.udc.es/dspace/bitstream/2183/123/3/Movements_juvenile_adult_spider_crab%2520%28WP%2520Jun%25202003%29.pdf.txt
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oai:ruc.udc.es:2183/1242021-06-04T12:36:11Zcom_2183_75com_2183_18428com_2183_4774col_2183_78
RUC. Repositorio da Universidade da Coruña
author
Carabel Chans, Sirka
author
Verísimo Amor, Patricia
author
Bernárdez Martí, Cristina
author
Freire, Juan
author
Fernández, Luis
2005-10-28T11:12:25Z
2005-10-28T11:12:25Z
2003
http://hdl.handle.net/2183/124
eng
Complex Patterns of Habitat Use by Spider Crabs Maja Squinado Revealed by Stable Isotope Analyses
info:eu-repo/semantics/workingPaper
URL
https://ruc.udc.es/dspace/bitstream/2183/124/1/Habitat%2520use%2520Maja%2520squinado%2520%28WP%2520v.1%2520Sept%25202003%29.pdf
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Habitat%20use%20Maja%20squinado%20(WP%20v.1%20Sept%202003).pdf
URL
https://ruc.udc.es/dspace/bitstream/2183/124/3/Habitat%2520use%2520Maja%2520squinado%2520%28WP%2520v.1%2520Sept%25202003%29.pdf.txt
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oai:ruc.udc.es:2183/1252018-05-10T15:03:27Zcom_2183_75com_2183_18428com_2183_4774col_2183_78
RUC. Repositorio da Universidade da Coruña
author
Corgos López-Prado, Antonio
author
Sánchez Carnero, Noela
author
Freire, Juan
2005-10-28T11:12:29Z
2005-10-28T11:12:29Z
2005
http://hdl.handle.net/2183/125
eng
Dynamics of the small-scale spatial structure of a local population of the spider
crab, "Maja brachydactyla"
info:eu-repo/semantics/workingPaper
URL
http://ruc.udc.es/dspace/bitstream/2183/125/1/Spatial%2520dynamics%2520Maja%2520%28WP%2520v1%2520ICC6%2520Glasgow%25202005%29.pdf
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Spatial%20dynamics%20Maja%20(WP%20v1%20ICC6%20Glasgow%202005).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/125/3/Spatial%2520dynamics%2520Maja%2520%28WP%2520v1%2520ICC6%2520Glasgow%25202005%29.pdf.txt
File
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oai:ruc.udc.es:2183/1262018-10-19T07:06:04Zcom_2183_75com_2183_18428com_2183_4774col_2183_78
RUC. Repositorio da Universidade da Coruña
author
Godínez Domínguez, Enrique
author
Freire, Juan
author
Franco-Gordo, María del Carmen
author
González Sansón, Gaspar
2005-10-28T11:12:33Z
2005-10-28T11:12:33Z
2003
http://hdl.handle.net/2183/126
[Abstract] Diversity is one of the most frequently used attributes of ecological
communities, and there is a long-standing discussion about their adequate use,
calculus and interpretation. One of the most conspicuous and simple diversity
estimators is species richness, but it has been criticized by recurrent pitfalls, which has
biased comparisons and the testing of hypotheses. Otherwise, synthetic ecological
indices of diversity are difficult to interpret due the underlying complex or cryptic
concepts. Most of the studies in soft-bottom macroinvertebrate communities trying to
estimate richness species, have actually quantified species diversity as species
density, the number of species per unit area. In the present study, the diversity of a
tropical Pacific soft bottom community is analytically decomposed using two null
models to assess species richness and evenness, and the slope of species-area
curves to estimate species density. A declining trend of species richness was
observed along a 2-year period and could be related to the cumulative effects of
interannual environmental variability and fishing disturbance. The species-area
relationship could be considered a good indicator of spatial heterogeneity, specifically
to illustrate the depth gradient. Local abundance was negatively correlated with
evenness, showing that high-density communities are the result of increases in
abundance of a few dominant species. Here we demonstrate that seasonality, depth
and abundance could explain diversity in soft-bottom macroinvertebrate communities of
coastal waters and propose a robust procedure to survey diversity as a part of
monitoring programs of coastal management.
eng
Diversity
Evenness
Species richness
Species-area curve
Macroinvertebrate assemblages
Tropical Pacific
Soft-bottom benthos
Decomposing diversity patterns of a soft-bottom macroinvertebrate community in the tropical eastern Pacific
info:eu-repo/semantics/workingPaper
URL
http://ruc.udc.es/dspace/bitstream/2183/126/1/Diversity_soft_bottom_communities%2520%28WP%2520v1%2520Oct%25202003%29.pdf
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URL
http://ruc.udc.es/dspace/bitstream/2183/126/3/Diversity_soft_bottom_communities%2520%28WP%2520v1%2520Oct%25202003%29.pdf.txt
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oai:ruc.udc.es:2183/1272018-10-19T07:06:53Zcom_2183_75com_2183_18428com_2183_4774col_2183_78
RUC. Repositorio da Universidade da Coruña
author
Franco-Gordo, María del Carmen
author
Godínez Domínguez, Enrique
author
Freire, Juan
2005-10-28T11:12:36Z
2005-10-28T11:12:36Z
2004
http://hdl.handle.net/2183/127
[Abstract] We examined larval fish diversity and assemblage structure on the central
Mexican Pacific (coast of Jalisco and Colima) using data from samplings carried
out with a Bongo net at 12 stations during 27 months, from December 1995
through December 1998. A total of 132 taxa were recorded, and the dominant
species were Bregmaceros bathymaster (90% of the total abundance),
Dormitator latifrons (1.9%) and Harengula thrissina (0.8%). Only B.
bathymaster, D. latifrons and Gobionellus sp. attained the 100 % of occurrence.
The effects of the 1997-98 El Niño event in ichthyoplankton diversity were
significant, however the prevalence of the normal seasonality could be
observed. Diversity null models were used to determine structural changes in
the assemblage due to El Niño effects; both species richness and evenness
were highest during El Niño. The most parsimonious models of assemblage
organization include the El Niño and seasonality as most significant
environmental variability sources. The small-scale spatial variability expressed
as the cross-shore gradient was not relevant. The dominant species group
formed by B. bathymaster, D. latifrons, and Vinciguerria lucetia typify for
similarity both the previous and El Niño period and the only change was the
abundance difference among periods. The El Niño period was typified by the
dominant species Bentosema panamense and H. thrissina, and by the rare
species Euthynus lineatus, and species of the genus Lujtanus. The assemblage
shows a similar organization in the different seasons, sharing the same
dominant species group. Seasonality produces only changes in the abundances
and relative frequencies of dominant species and different rare species are
characteristic of the different seasons. The average taxonomical distinctness,
that could be considered as a measure of functional diversity, was highly
sensitive to the seasonal change of the assemblages independently of the El
Niño; this index showed lowest values during tropical and transition periods
characterized by warm and oligotrophic waters
eng
El Niño southern oscillation
Fish larvae
Diversity null models
Taxonomical distinctness
Species richness
Evenness
Assemblages
Tropical Pacific
Interannual variability of the diversity and structure
of ichthyoplankton assemblages in the central Mexican Pacific
info:eu-repo/semantics/workingPaper
URL
http://ruc.udc.es/dspace/bitstream/2183/127/1/Larval_fish_assemblages_ENSO%2520%28WP%2520v.1%252001_2004%29.pdf
File
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URL
http://ruc.udc.es/dspace/bitstream/2183/127/3/Larval_fish_assemblages_ENSO%2520%28WP%2520v.1%252001_2004%29.pdf.txt
File
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oai:ruc.udc.es:2183/1282018-10-19T07:11:08Zcom_2183_75com_2183_18428com_2183_4774col_2183_78
RUC. Repositorio da Universidade da Coruña
author
Pallas Lozano, Alicia
author
García Calvo, Beatriz
author
Corgos López-Prado, Antonio
author
Bernárdez Martí, Cristina
author
Freire, Juan
2005-10-28T11:12:43Z
2005-10-28T11:12:43Z
2005
http://hdl.handle.net/2183/128
[Abstract] Coastal areas have been widely considered as nurseries for many marine
species. New approaches to this concept take into account interactions among
environmental variables and ecological variations related to geographical location, as
well as complex life cycles of marine invertebrates. We present a comparative approach
to assess the relevance of environmental variables on the determination of patterns of
distribution and habitat use of benthic decapod species in coastal areas. We
hypothesize that this approach allows us to infer processes originating these patterns
and to identify the main habitat use models. An intensive fine-grain sampling design
was used to take into account the environmental gradients occurring at different spatial
scales (defined by substrate type, depth, exposure and geographical location) in a
temperate oceanic bay (Ria de A Coruña, Spain). A high proportion of juveniles were
found in most populations, but the results do not allow us to generalize the idea of
coastal areas as potential nurseries, except for few species with a marked spatial
segregation between juveniles and adults. Larval transport seems to be the main
process regulating mesoscale distribution patterns, while microscale distribution
responds to a complex interaction among different processes, i. e. habitat selection at
settlement, differential mortality among habitats, post-settlement dispersal and
ontogenetic habitat shifts. Sandy substrates showed low-diversity communities
dominated by hermit crabs. In rocky bottoms, variability in spatial patterns was mostly
related to substrate type and geographical location. Caridean shrimps showed higher
densities on flat rock surfaces, with similar juvenile and adult patterns. Anomuran species occurred mainly on cobbles. Distribution patterns of brachyurans varied among
species, but did not change greatly from juveniles to adults
spa
Spatial scale
Nursery habitat
Habitat selection
Settlement
Decapod crustaceans
Coastal ecosystems
Habitat use
Distribution
Ria de A Coruña
Inter-specific comparative analysis of distribution and habitat use patterns
of benthic decapod crustaceans in shallow waters
info:eu-repo/semantics/workingPaper
URL
http://ruc.udc.es/dspace/bitstream/2183/128/1/Distribution_habitat_use_coastal_decapods%2520%28WP%2520v1%2520May%25202005%29.pdf
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URL
http://ruc.udc.es/dspace/bitstream/2183/128/3/Distribution_habitat_use_coastal_decapods%2520%28WP%2520v1%2520May%25202005%29.pdf.txt
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oai:ruc.udc.es:2183/1292018-10-19T07:18:57Zcom_2183_75com_2183_18428com_2183_4774col_2183_78
RUC. Repositorio da Universidade da Coruña
author
Corgos López-Prado, Antonio
2005-10-28T11:12:47Z
2005-10-28T11:12:47Z
2005
http://hdl.handle.net/2183/129
[Abstract] Ontogenetic changes in the relative growth of males and females of the spider crab Maja brachydactyla, a species with terminal moult and determinate growth, were analyzed and related to their reproductive (maturity) status. Sampling was carried out in
the Ría de A Coruña (NW Spain) from December 1997 to November 1999. A
combination of principal component analysis of morphometric variables, nonhierarchical
K-means cluster and discriminant analysis allowed to differentiate two
morphometric groups of males defined as juvenile and adult phases and develop
statistical methods to assign maturity status to individual crabs. A significant change in
allometry of cheliped size was detected in juvenile males with a breakpoint at 96.2 mm
carapace length (CL), separating the inmature and adolescent phases. Histological
analysis of males showed that more than 60% of morphometrically juveniles and 100%
of morphometrically adults presented spermatophores in the gonad. Size at gonad
maturity in males (estimated as CL50) was 96.2 mm CL. Size at morphometric maturity
was estimated comparing two methodologies: the size at 50% maturity (CL50) and the
median size of adult cohorts. For the whole sampling period, two adult-year classes,
CL50 was estimated to be 136.5 mm for males and 130.3 mm for females, while median
size of adult cohorts for the same period was estimated to be 139.9 mm for males and
148.7 mm for females. In all cases the size at maturity obtained from the median of the
cohort was greater than the one resulting from the CL50 method with differences of over
20 mm, showing the bias that methods based in CL50 could cause in animals with
determinate growth. Due the spatial segregation of adults and juveniles and the
availability of morphological and morphometrical methods to estimate the maturity
status of any crab, we propose a combination of spatial closures and direct protection of
juvenile habitat as management strategies alternative to minimum landing sizes
spa
Morphometric and gonad maturity in the spider crab "Maja brahcydactyla". A
comparison of methods for the estimation of the size at maturity in species with determinate growth
info:eu-repo/semantics/workingPaper
URL
http://ruc.udc.es/dspace/bitstream/2183/129/1/Morphometric%2520and%2520gonad%2520maturity%2520in%2520Maja%2520%28WP%2520v1%2520Feb%25202005%29.pdf
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265591
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URL
http://ruc.udc.es/dspace/bitstream/2183/129/3/Morphometric%2520and%2520gonad%2520maturity%2520in%2520Maja%2520%28WP%2520v1%2520Feb%25202005%29.pdf.txt
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oai:ruc.udc.es:2183/1302021-06-04T12:35:08Zcom_2183_75com_2183_18428com_2183_4774col_2183_78
RUC. Repositorio da Universidade da Coruña
author
Freire, Juan
author
Carabel Chans, Sirka
author
Verísimo Amor, Patricia
author
Bernárdez Martí, Cristina
author
Fernández, Luis
2005-10-28T11:12:51Z
2005-10-28T11:12:51Z
2005
http://hdl.handle.net/2183/130
[Abstract] Patterns of habitat use by spider crab juveniles, Maja brachydactila, from two geographic areas in the NW coast of the Iberian Peninsula, were analyzed through the analysis of Carbon and Nitrogen stable isotope relations in two tissues (muscle and hepatopancreas). The main organisms that constitute the diet of spider crab juveniles in rocky and sandy habitats and the
different organic matter sources in coastal food webs were analysed too. The isotopic ratios of C and N did not show any difference between habitats. The use of carapace colour and epibiosis as an indicator of habitat use was not supported by our data. These results suggest
much more frequent movements between both types of habitats than those suggested by
former studies (carried out using behavioural observations and sampling distributions) that hypothesized seasonal and ontogenetic changes. In the coastal food web, two main trophic compartments were identified according to the organic matter source: one based in plankton
and seaweeds, that corresponds, mainly, with rocky habitats, and another based in
sedimentary particulated organic matter that correspond with sandy bottoms. The
relationships observed between the C and N isotopic ratios and the proportions of lipids and proteins in muscle and hepatopancreas seem to indicate a clear relation between the trophic origin of the food consumed by the spider crab juveniles and its energetic condition, and the
individuals that spent more time feeding in sandy areas would show a better energetic
condition. Juveniles of Maja brachydactila, independently of the habitat of capture, would consume in average approximately two thirds of the preys in rocky habitats and a third in sedimentary habitats. The results obtained indicate that, in exposed environments, large juveniles spend most of the time in sedimentary bottoms, where they find more refuge, but
they move frequently (probably at night) to the nearby rocky substrates to feed.
eng
Coastal food webs
Feeding
Habitat use
Juveniles
Maja brachydactila
Stable isotopes
Complex Patterns of Habitat Use by Juvenile Spider Crabs Maja
Brachydactila Revealed by Stable Isotope Analyses
info:eu-repo/semantics/workingPaper
URL
https://ruc.udc.es/dspace/bitstream/2183/130/1/Habitat%2520use%2520and%2520stable%2520isotopes%2520in%2520Maja%2520%28WP%2520v1%2520Feb%25202005%29.pdf
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URL
https://ruc.udc.es/dspace/bitstream/2183/130/3/Habitat%2520use%2520and%2520stable%2520isotopes%2520in%2520Maja%2520%28WP%2520v1%2520Feb%25202005%29.pdf.txt
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oai:ruc.udc.es:2183/1312018-10-19T07:28:26Zcom_2183_75com_2183_18428com_2183_4774col_2183_78
RUC. Repositorio da Universidade da Coruña
author
Pallas Lozano, Alicia
author
García Calvo, Beatriz
author
Corgos López-Prado, Antonio
author
Bernárdez Martí, Cristina
author
Freire, Juan
2005-10-28T11:12:58Z
2005-10-28T11:12:58Z
2005
http://hdl.handle.net/2183/131
[Abstract] Coastal areas have been widely considered as nurseries for many marine
species. New approaches to this concept take into account interactions among
environmental variables and ecological variations related to geographical location, as
well as complex life cycles of marine invertebrates. We present a comparative approach
to assess the relevance of environmental variables on the determination of patterns of
distribution and habitat use of benthic decapod species in coastal areas. We
hypothesize that this approach allows us to infer processes originating these patterns
and to identify the main habitat use models. An intensive fine-grain sampling design
was used to take into account the environmental gradients occurring at different spatial
scales (defined by substrate type, depth, exposure and geographical location) in a
temperate oceanic bay (Ria de A Coruña, Spain). A high proportion of juveniles were
found in most populations, but the results do not allow us to generalize the idea of
coastal areas as potential nurseries, except for few species with a marked spatial
segregation between juveniles and adults. Larval transport seems to be the main
process regulating mesoscale distribution patterns, while microscale distribution
responds to a complex interaction among different processes, i. e. habitat selection at
settlement, differential mortality among habitats, post-settlement dispersal and
ontogenetic habitat shifts. Sandy substrates showed low-diversity communities
dominated by hermit crabs. In rocky bottoms, variability in spatial patterns was mostly
related to substrate type and geographical location. Caridean shrimps showed higher
densities on flat rock surfaces, with similar juvenile and adult patterns. Anomuran species occurred mainly on cobbles. Distribution patterns of brachyurans varied among
species, but did not change greatly from juveniles to adults
eng
Spatial scale
Nursery habitat
Habitat selection
Settlement
Decapod crustaceans
Coastal ecosystems
Habitat use
Distribution
Ria de A Coruña
Inter-specific comparative analysis of distribution and habitat use patterns
of benthic decapod crustaceans in shallow waters
info:eu-repo/semantics/workingPaper
URL
http://ruc.udc.es/dspace/bitstream/2183/131/1/Distribution_habitat_use_coastal_decapods%2520%28WP%2520v1%2520May%25202005%29.pdf
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URL
http://ruc.udc.es/dspace/bitstream/2183/131/3/Distribution_habitat_use_coastal_decapods%2520%28WP%2520v1%2520May%25202005%29.pdf.txt
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oai:ruc.udc.es:2183/1322018-10-19T07:30:43Zcom_2183_75com_2183_18428com_2183_4774col_2183_78
RUC. Repositorio da Universidade da Coruña
author
Corgos López-Prado, Antonio
author
Verísimo Amor, Patricia
author
Freire, Juan
2005-10-28T11:13:02Z
2005-10-28T11:13:02Z
2005
http://hdl.handle.net/2183/132
[Resumen] Se analiza la temporalidad y sincronización de los procesos de muda terminal, maduración gonadal, acumulación de reservas energéticas y migración en la centolla, Maja brachydactyla, tanto a nivel individual como poblacional, y su variabilidad intra- e intersexual. Para explicar esta variabilidad en la temporalidad se plantean dos hipótesis: 1) hipótesis fisiológica: machos y hembras inician la migración cuando alcanzan un estado fisiológico adecuado (un nivel de reservas energéticas óptimo), y 2) hipótesis de oportunidades de apareamiento: la temporalidad de la migración trataría de maximizar las oportunidades de apareamiento y la calidad de las parejas. Nuestros resultados muestran que los machos llevan a cabo la muda terminal (con un pico en Julio) antes que las hembras (Agosto). En las hembras, el inicio de la madurez gonadal se produce entre dos y tres meses después de alcanzar la madurez morfométrica (a partir de Octubre), coincidiendo con el período previo y durante la migración de apareamiento a aguas profundas. El análisis de las espermatecas de las hembras primíparas reveló que en la zona somera no se producen prácticamente apareamientos, en el corredor migratorio se producen las primeras cópulas, y es en los deep mating grounds donde se producen probablemente la mayor parte de los apareamientos. En los machos la madurez gonadal se produce antes de la madurez morfométrica. El día promedio de inicio de migración obtenido para los machos fue el 8 de Octubre, mientras que para las hembras fue el 16 de Octubre, lo que confirma evidencias previas de un adelanto de los machos en el inicio de la migración. No se observaron diferencias en la condición fisiológica (índices de condición de músculo, gónada y hepatopáncreas) entre migradores y no migradores, lo que indica claramente que la hipótesis fisiológica no se cumple en esta especie, dado que incluso se capturó un mayor porcentaje de ejemplares en postmuda en el corredor migratorio que en aguas someras. La condición fisiológica mejoró con el tiempo en ambos sexos tanto en los ejemplares capturados en el área somera como en el corredor migratorio, y por tanto los ejemplares que migran primero lo hacen en peor condición fisiológica. Además, los migradores tempranos presentaron una talla media significativamente menor que los migradores tardíos. Nuestros resultados sugieren que la variabilidad intrapoblacional e intersexual estaría relacionada con diferentes estrategias reproductivas, y no con una limitación fisiológica. Así, los machos de peor calidad (y menor capacidad competitiva) deberían migrar al inicio de la temporada (antes o coordinadamente con las primeras hembras), mientras que los machos de alta calidad podrían retrasar la migración al momento en que sus reservas fueran máximas dado que podrían desplazar a los machos de baja calidad en los hábitats de apareamiento
spa
Estacionalidad de la muda terminal y la migración reproductiva en la centolla, "Maja brachydactyla" : evidencias de estrategias de apareamiento alternativas
info:eu-repo/semantics/workingPaper
URL
http://ruc.udc.es/dspace/bitstream/2183/132/1/Estrategias%2520reproductivas%2520Maja%2520%28WP%2520v1%2520May%25202005_esp%29.pdf
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URL
http://ruc.udc.es/dspace/bitstream/2183/132/3/Estrategias%2520reproductivas%2520Maja%2520%28WP%2520v1%2520May%25202005_esp%29.pdf.txt
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oai:ruc.udc.es:2183/1332018-10-19T07:33:04Zcom_2183_75com_2183_18428com_2183_4774col_2183_78
RUC. Repositorio da Universidade da Coruña
author
Corgos López-Prado, Antonio
author
Sampedro Pastor, María Paz
author
González-Gurriarán, Eduardo
author
Freire, Juan
2005-10-28T11:13:06Z
2005-10-28T11:13:06Z
2005
http://hdl.handle.net/2183/133
[Abstract] An analysis of growth at moult (for both the prepubertal and terminal moults), moulting seasonality and the intermoult period in the spider crab Maja squinado in the Ría de A Coruña (NW Spain) was carried out based on a mark-recapture
experiment. Crabs between 70 and 130 mm carapace length (CL) undergo a mean
increase at moult of 32.4% from their pre-moult size. Generalised Linear Models
(GLMs) were used to construct growth models, employing a combination of
information from the mark-recapture study and other previous studies performed in
both laboratory and extensive culture, to estimate the effects of the biological
variables and the study method. No differences were found in the growth rate
between males and females. However, the effects of the study method, the premoult
CL and the interaction between them were significant. The smallest-sized
crabs undergo a greater increase in size in the laboratory and culture studies, while
the largest individuals undergo greater growth in the field. The mean intermoult
period estimated for prepubertal moults in the field ranged from 50 to 86 days, which
Corgos et al., GROWTH AT MOULT OF MAJA BRACHYDACTYLA
is similar to the 84.7 days observed in the laboratory study. The prepubertal moults
occurred primarily in spring and autumn in the field, while under culture conditions,
the crabs moulted mainly in the spring. The intermoult period for terminal moults was
estimated to be around 90 days, slightly lower than the value of 104 days obtained in
the laboratory. The terminal moult took place generally in summer (June-September)
both at sea as well as in culture experiments. The intermoult period of juveniles at
sea was highly variable, and some of the specimens did not moult for more than 5
months.
eng
Growth at moulth, intermoult period and moulting seasonality of the spider crab "Maja brachydactyla" : combining information from mark-recapture and experimental studies
info:eu-repo/semantics/workingPaper
URL
http://ruc.udc.es/dspace/bitstream/2183/133/1/Growth%2520in%2520Maja_mark-recapture%2520%28WP%2520v1%2520May%25202005%29.pdf
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URL
http://ruc.udc.es/dspace/bitstream/2183/133/3/Growth%2520in%2520Maja_mark-recapture%2520%28WP%2520v1%2520May%25202005%29.pdf.txt
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oai:ruc.udc.es:2183/1342018-10-19T07:35:59Zcom_2183_75com_2183_18428com_2183_4774col_2183_78
RUC. Repositorio da Universidade da Coruña
author
Freire, Juan
author
Fernández, Luis
author
González-Gurriarán, Eduardo
2005-10-28T11:13:12Z
2005-10-28T11:13:12Z
1998
http://hdl.handle.net/2183/134
[Abstract] In this paper different aspects of the fishery and life history of the spider crab Maja squinado in southern Galicia (NW Spain) are analyzed to evaluate the potential effects of the fishery on the sperm limitation of the reproductive effort (egg production) of the population.
Juveniles of the spider crab inhabit shallow waters, where they carry out a terminal
moult in August-September, attaining sexual maturity when they are 2+ years old. A short
time after the terminal moult (October-November), adults migrate to deeper waters (up to
100 m), where mating occurs (January-February). Field and laboratory data show that
multiple matings and sperm storage in female seminal receptacles occur, indicating that
females are able to fertilize multiple broods during the annual breeding cycle using stored
sperm.
The spider crab is the target of a tangle-net fishery, characterized by a very high fishing
effort similar for both sexes. The fishing season is from November-December until May-June
and is mostly dependent on migrating animals. Data from catch composition (percentage of
recent recruits at the beginning of the season), recaptures from the fishery of females
tagged with ultrasonic transmitters and electronic archival tags, and CPUE trends over the
course of the fishing season (Leslie analyses of stock depletion) indicate that more than
90% of postpubertal (primiparous) adults are caught during the fishing season. The fishery
is almost exclusively dependent on the autumn recruitment of the annual cohort of
primiparous adults. Most of the catches are made in autumn and early winter, before or
during the mating season (for 4 fishing seasons an average of 45 and 66% of the catches
are made before January and February respectively).
The volume of sperm stored in the seminal receptacles and the percentage of females with
sperm is lower for females caught in the field during or immediately after the mating season
than for females kept in laboratory with a high density of males, and decreases throughout
the annual breeding cycle. These two facts may be brought about the low density of both
sexes in the mating grounds due to fishery exploitation. We hypothesized that, although
sperm limitation probably does occur, the main factor in the severe fishery induced
limitation of the reproductive effort of the Galician spider crab populations, as opposed to
other crab fisheries targeting only males, is the mortality imposed on females before or
during breeding. More information about mating habitat, seasonality and behaviour would be
needed for an accurate evaluation of the potential effects of the fishery (and of different
management strategies) on sperm limitation.
eng
Life history
Maja squinado
Mating
Migrations
Mortality
Reproductive effort
Seasonality
Spider crab
Tangle-net fishery
Interactions of the fishery of the spider crab Maja squinado with mating,
reproductive biology and migrations
info:eu-repo/semantics/workingPaper
URL
http://ruc.udc.es/dspace/bitstream/2183/134/1/Fisheries_and_mating.pdf
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URL
http://ruc.udc.es/dspace/bitstream/2183/134/3/Fisheries_and_mating.pdf.txt
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oai:ruc.udc.es:2183/1362018-10-19T07:39:17Zcom_2183_75com_2183_18428com_2183_4774col_2183_78
RUC. Repositorio da Universidade da Coruña
author
Freire, Juan
2005-10-28T11:13:20Z
2005-10-28T11:13:20Z
2005
http://hdl.handle.net/2183/136
spa
Catástrofes naturales
Reflexiones sobre la gestión informativa de las catástrofes marítimas
info:eu-repo/semantics/workingPaper
URL
http://ruc.udc.es/dspace/bitstream/2183/136/1/Gestion%2520informativa%2520catastrofes%2520maritimas%2520%28WP%2520v1%2520Jun%25202005%29.pdf
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URL
http://ruc.udc.es/dspace/bitstream/2183/136/3/Gestion%2520informativa%2520catastrofes%2520maritimas%2520%28WP%2520v1%2520Jun%25202005%29.pdf.txt
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oai:ruc.udc.es:2183/1372018-10-19T07:48:51Zcom_2183_75com_2183_18428com_2183_4774col_2183_78
RUC. Repositorio da Universidade da Coruña
author
Carabel Chans, Sirka
author
Godínez Domínguez, Enrique
author
Verísimo Amor, Patricia
author
Fernández, Luis
author
Freire, Juan
2005-10-28T11:13:23Z
2005-10-28T11:13:23Z
2004
http://hdl.handle.net/2183/137
[Abstract] The relative abundance of the light and heavy forms of stable isotopes of Carbon and
Nitrogen is commonly used in the research of marine food webs. Dehydration of
samples is needed for C and N isotopic analysis, and in those organisms with inorganic
carbonate structures acidification with hydrochloric acid is also needed for sample
preparation. There is not a consensus about the methodology appropriate for sample
processing. In the present study, the effects of different sample processing methods in
the relative abundance of stable isotopes of C and N in the different trophic
compartments of a coastal food web are evaluated. The final purpose is to define an
adequate methodology to be used in the construction of whole food webs. The results
obtained after acidification show a decrease in carbon values for sedimentary organic
matter, suspended particulate organic matter, plankton and invertebrates with
carbonated structures, and a variable response for nitrogen values. According to our
results we recommend sampling acidification for carbon analysis in compartments in
which variations of this element were observed. For nitrogen analysis acidification
should not be done. Different treatments of dehydration studied provoked significant
differences only in nitrogen values, thereby freeze-drying seems the most adequate
method. Muscle tissue should be used in invertebrate with carbonated structures
whenever body sizes make it possible.
eng
Stable isotopes
Foodweb
Coastal ecosystems
Sample processing
An assessment of sample processing methods for stable isotope analyses of coastal foodwebs
info:eu-repo/semantics/workingPaper
URL
http://ruc.udc.es/dspace/bitstream/2183/137/1/Sample%2520processing%2520for%2520stable%2520isotope%2520analyses%2520%28WP%2520v.2%2520Apr%25202005%29.pdf
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URL
http://ruc.udc.es/dspace/bitstream/2183/137/3/Sample%2520processing%2520for%2520stable%2520isotope%2520analyses%2520%28WP%2520v.2%2520Apr%25202005%29.pdf.txt
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oai:ruc.udc.es:2183/1382018-10-19T07:58:31Zcom_2183_75com_2183_18428com_2183_4774col_2183_78
RUC. Repositorio da Universidade da Coruña
author
Freire, Juan
author
Carabel Chans, Sirka
author
Verísimo Amor, Patricia
author
Bernárdez Martí, Cristina
author
Fernández, Luis
2005-10-28T11:13:30Z
2005-10-28T11:13:30Z
2005
http://hdl.handle.net/2183/138
[Abstract] Patterns of habitat use by spider crab juveniles, Maja brachydactila, from two geographic areas in the NW coast of the Iberian Peninsula, were analyzed through the analysis of Carbon and Nitrogen stable isotope relations in two tissues (muscle and hepatopancreas). The main
organisms that constitute the diet of spider crab juveniles in rocky and sandy habitats and the
different organic matter sources in coastal food webs were analysed too. The isotopic ratios of C and N did not show any difference between habitats. The use of carapace colour and
epibiosis as an indicator of habitat use was not supported by our data. These results suggest
much more frequent movements between both types of habitats than those suggested by
former studies (carried out using behavioural observations and sampling distributions) that
hypothesized seasonal and ontogenetic changes. In the coastal food web, two main trophic
compartments were identified according to the organic matter source: one based in plankton
and seaweeds, that corresponds, mainly, with rocky habitats, and another based in
sedimentary particulated organic matter that correspond with sandy bottoms. The
relationships observed between the C and N isotopic ratios and the proportions of lipids and
proteins in muscle and hepatopancreas seem to indicate a clear relation between the trophic
origin of the food consumed by the spider crab juveniles and its energetic condition, and the
individuals that spent more time feeding in sandy areas would show a better energetic
condition. Juveniles of Maja brachydactila, independently of the habitat of capture, would
consume in average approximately two thirds of the preys in rocky habitats and a third in
sedimentary habitats. The results obtained indicate that, in exposed environments, large juveniles spend most of the time in sedimentary bottoms, where they find more refuge, but
they move frequently (probably at night) to the nearby rocky substrates to feed.
eng
Habitat use
Complex patterns of habitat use by spider crabs Maja squinado revealed by stable isotope analyses
info:eu-repo/semantics/workingPaper
URL
http://ruc.udc.es/dspace/bitstream/2183/138/1/Habitat%2520use%2520and%2520stable%2520isotopes%2520in%2520Maja%2520%28WP%2520v1%2520Feb%25202005%29.pdf
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URL
http://ruc.udc.es/dspace/bitstream/2183/138/3/Habitat%2520use%2520and%2520stable%2520isotopes%2520in%2520Maja%2520%28WP%2520v1%2520Feb%25202005%29.pdf.txt
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oai:ruc.udc.es:2183/1392018-10-19T08:07:36Zcom_2183_75com_2183_18428com_2183_4774col_2183_79
RUC. Repositorio da Universidade da Coruña
author
Freire, Juan
author
Labarta Fernández, Uxío
2005-10-28T11:15:31Z
2005-10-28T11:15:31Z
2003
La huella del fuel : ensayos sobre el "Prestige". A Coruña : Fundación Santiago Rey Fernández-Latorre, 2003, p. 104-135
84-9757-116-9
http://hdl.handle.net/2183/139
spa
Prestige
Contaminación
Ecosistemas marinos
El "Prestige" : impactos sobre los recursos y ecosistemas marinos
info:eu-repo/semantics/bookPart
URL
http://ruc.udc.es/dspace/bitstream/2183/139/1/Impacto_recursos_ecosistemas%2520%28La%2520Huella%2520del%2520Fuel%25202003%29.pdf
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Impacto_recursos_ecosistemas%20(La%20Huella%20del%20Fuel%202003).pdf
URL
http://ruc.udc.es/dspace/bitstream/2183/139/3/Impacto_recursos_ecosistemas%2520%28La%2520Huella%2520del%2520Fuel%25202003%29.pdf.txt
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Impacto_recursos_ecosistemas%20(La%20Huella%20del%20Fuel%202003).pdf.txt
oai:ruc.udc.es:2183/1402016-06-14T11:23:13Zcom_2183_69com_2183_18428com_2183_4774col_2183_72
RUC. Repositorio da Universidade da Coruña
author
Vilares Ferro, Manuel
author
Graña Gil, Jorge
author
Alvariño Alvariño, Pilar
2005-10-28T15:42:24Z
2005-10-28T15:42:24Z
1999
Kornai, A. (ed.).Extended Finite State Models of Language, pp. 37-47.
0-521-63198-X
http://hdl.handle.net/2183/140
eng
Finite-State Morphology and Formal Verification
info:eu-repo/semantics/bookPart
URL
http://ruc.udc.es/dspace/bitstream/2183/140/1/GranaEFSML1999.ps
File
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GranaEFSML1999.ps
oai:ruc.udc.es:2183/1412022-07-13T12:12:44Zcom_2183_69com_2183_18428com_2183_4774col_2183_70
RUC. Repositorio da Universidade da Coruña
author
Alonso, Miguel A.
author
Graña Gil, Jorge
author
Vilares Ferro, Manuel
2005-10-28T15:43:21Z
2005-10-28T15:43:21Z
1999
Actas del XV Congreso de la Sociedad Española para el Procesamiento del Lenguaje Natural (SEPLN-1999), Lleida (Spain). Revista de la Sociedad Española para el Procesamiento del Lenguaje Natural, vol. 25, pp. 7-14.
1135-5948
http://hdl.handle.net/2183/141
[Resumen] A partir de un algoritmo de tipo CYK se desarrolla una serie de nuevos algoritmos tabulares para el análisis de Gramáticas Lineales de Índices que incluye algoritmos ascendentes y algoritmos de tipo Earley con y sin la propiedad del prefijo válido, creando un camino evolutivo continuo en el que cada algoritmo puede ser obtenido mediante transformaciones simples del algoritmo precedente. Los nuevos algoritmos creados permiten establecer un paralelismo con los algoritmos disponibles para Gramáticas de Adjunción de Árboles.
spa
Nuevos algoritmos tabulares para el análisis de LIG
info:eu-repo/semantics/article
URL
https://ruc.udc.es/dspace/bitstream/2183/141/3/GranaSEPLN1999.pdf
File
MD5
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GranaSEPLN1999.pdf
URL
https://ruc.udc.es/dspace/bitstream/2183/141/4/GranaSEPLN1999.pdf.txt
File
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GranaSEPLN1999.pdf.txt
oai:ruc.udc.es:2183/1422022-07-13T12:13:25Zcom_2183_69com_2183_18428com_2183_4774col_2183_70
RUC. Repositorio da Universidade da Coruña
author
Vilares, Jesús
author
Barcala Rodríguez, Francisco Mario
author
Alonso, Miguel A.
author
Graña Gil, Jorge
author
Vilares Ferro, Manuel
2005-10-28T15:43:24Z
2005-10-28T15:43:24Z
2002
In Proceedings of the Eighth Iberoamerican Conference on Artificial Intelligence (IBERAMIA-2002), Sevilla (Spain). Published in Lecture Notes in Artificial Intelligence, vol. 2527, pp. 635-644.
3-540-00131-X
0302-9743
http://hdl.handle.net/2183/142
eng
Practical NLP-Based Text Indexing
info:eu-repo/semantics/article
URL
https://ruc.udc.es/dspace/bitstream/2183/142/1/GranaIBERAMIA2002.ps
File
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GranaIBERAMIA2002.ps
oai:ruc.udc.es:2183/1432016-06-14T11:23:13Zcom_2183_69com_2183_18428com_2183_4774col_2183_70
RUC. Repositorio da Universidade da Coruña
author
Valderruten Vidal, Alberto
author
Vilares Ferro, Manuel
author
Graña Gil, Jorge
2005-10-28T15:43:26Z
2005-10-28T15:43:26Z
1995
In Proceedings of the Fifth European Software Engineering Conference (ESEC-1995), Sitges (Spain). Published in Lecture Notes in Computer Science, vol. 989, pp. 76-89.
84-540-60406-5
http://hdl.handle.net/2183/143
eng
Instrumentation of Synchronous Reactive Models for Performance Engineering
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/143/1/GranaESEC1995.ps
File
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GranaESEC1995.ps
oai:ruc.udc.es:2183/1442018-10-19T08:12:17Zcom_2183_69com_2183_18428com_2183_4774col_2183_70
RUC. Repositorio da Universidade da Coruña
author
Vilares Ferro, Manuel
author
Otero Pombo, Juan
author
Graña Gil, Jorge
2005-10-28T15:43:29Z
2005-10-28T15:43:29Z
2004
In Proceedings of the Ninth International Conference on Implementation and Application of Automata (CIAA-2004), Kingston, Ontario (Canada). To appear in Lecture Notes in Computer Science.
0302-9743
http://hdl.handle.net/2183/144
[Abstract] We describe an algorithm to deal with error repair over finite-state architectures. Such a technique is of interest in spelling correction as well as approximate string matching in a variety of applications related to natural language processing, such as information extraction/recovery or answer searching, where error-tolerant recognition allows misspelled input words to be integrated in the computational process. Our proposal relies on a regional least-cost repair strategy, dynamically gathering all relevant information in the context of the error location. The system guarantees asymptotic equivalence with global repair strategies.
eng
Regional Finite-State Error Repair
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/144/1/GranaCIAA2004.ps
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oai:ruc.udc.es:2183/1452018-10-19T08:13:44Zcom_2183_69com_2183_18428com_2183_4774col_2183_70
RUC. Repositorio da Universidade da Coruña
author
Graña Gil, Jorge
author
Andrade Sánchez, Gloria
author
Vilares, Jesús
2005-10-28T15:43:31Z
2005-10-28T15:43:31Z
2002
Proceedings of the Seventh International Conference on Implementation and Application of Automata (CIAA-2002), Tours (France). Champarnaud, J.-M.; Maurel, D. (eds.). Lecture Notes in Computer Science, vol. 2608, pp. 128-137.
3-540-40391-4
0302-9743
http://hdl.handle.net/2183/145
[Abstract] With the aim of removing the residuary errors made by pure stochastic disambiguation models, we put forward a hybrid system in which linguist users introduce high level contextual rules to be applied in combination with a tagger based on a Hidden Markov Model. The design of these rules is inspired in the Constraint Grammars formalism. In the present work, we review this formalism in order to propose a more intuitive syntax and semantics for rules, and we develop a strategy to compile the rules under the form of Finite State Transducers, thus guaranteeing an efficient execution framework.
eng
Compilation of constraint-based contextual rules for part-of-speech tagging into finite state transducers
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/145/1/GranaCIAA2002.ps
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oai:ruc.udc.es:2183/1462022-07-13T12:10:56Zcom_2183_69com_2183_18428com_2183_4774col_2183_70
RUC. Repositorio da Universidade da Coruña
author
Graña Gil, Jorge
author
Barcala Rodríguez, Francisco Mario
author
Alonso, Miguel A.
2005-10-28T15:43:33Z
2005-10-28T15:43:33Z
2001
In Proceedings of the Sixth International Conference on Implementation and Application of Automata (CIAA-2001), Pretoria (Republic South Africa). Watson, B. W.; Wood, D. (eds.). Lecture Notes in Computer Science, vol. 2494, pp. 135-148.
3-540-00400-9
0302-9743
http://hdl.handle.net/2183/146
[Abstract] We present a reflection on the evolution of the different methods for constructing minimal deterministic acyclic finite-state automata from a finite set of words. We outline the most important methods, including the traditional ones (which consist of the combination of two phases: insertion of words and minimization of the partial automaton) and the incremental algorithms (which add new words one by one and minimize the resulting automaton on-the-fly, being much faster and having significantly lower memory requirements). We analyze their main features in order to provide some improvements for incremental constructions, and a general architecture that is needed to implement large dictionaries in natural language processing (NLP) applications.
eng
Compilation methods of minimal acyclic finite-state automata for large dictionaries.
info:eu-repo/semantics/article
URL
https://ruc.udc.es/dspace/bitstream/2183/146/1/GranaCIAA2001.ps
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oai:ruc.udc.es:2183/1472022-07-13T12:09:36Zcom_2183_69com_2183_18428com_2183_4774col_2183_70
RUC. Repositorio da Universidade da Coruña
author
Graña Gil, Jorge
author
Alonso, Miguel A.
author
Vilares Ferro, Manuel
2005-10-28T15:43:35Z
2005-10-28T15:43:35Z
2002
Proceedings of the Fifth International Conference on Text, Speech and Dialogue (TSD-2002), Brno (Czech Republic).Sojka, P.; Kopecek, I.; Pala, K. (eds.). Lecture Notes in Artificial Intelligence, vol. 2448, pp. 3-10.
3-540-44129-8
0302-9743
http://hdl.handle.net/2183/147
Current taggers assume that input texts are already tokenized, i.e. correctly segmented in \emph{tokens} or high level information units that identify each individual component of the texts. This working hypothesis is unrealistic, due to the heterogeneous nature of the application texts and their sources. The greatest troubles arise when this segmentation is ambiguous. The choice of the correct segmentation alternative depends on the context, which is precisely what taggers study. In this work, we develop a tagger able not only to decide the tag to be assigned to every token, but also to decide whether some of them form or not the same term, according to different segmentation alternatives. For this task, we design an extension of the Viterbi algorithm able to evaluate streams of tokens of different lengths over the same structure. We also compare its time and space complexities with those of the classic and iterative versions of the algorithm.
eng
A common solution for tokenization and part-of-speech tagging: one-pass Viterbi algorithm vs. Iterative approaches
info:eu-repo/semantics/article
URL
https://ruc.udc.es/dspace/bitstream/2183/147/1/GranaTSD2002.ps
File
MD5
3c76606ec9ff2cb4f1a6d6a215cf8119
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oai:ruc.udc.es:2183/1482018-10-19T08:18:09Zcom_2183_69com_2183_18428com_2183_4774col_2183_70
RUC. Repositorio da Universidade da Coruña
author
Graña Gil, Jorge
author
Barcala Rodríguez, Francisco Mario
author
Vilares Ferro, Manuel
2005-10-28T15:43:37Z
2005-10-28T15:43:37Z
2002
Proceedings of the Third International Conference on Computational Linguistics and Intelligent Text Processing (CICLING-2002), Ciudad de Méjico (Méjico). Published in Lecture Notes in Computer Science, vol. 2276, pp. 240-249. Springer Verlag. Gelbukh, A. (ed.).
3-540-43219-1
0302-9743
http://hdl.handle.net/2183/148
[Abstract] One of the most important prior tasks for robust part-of-speech tagging is the correct tokenization or segmentation of the texts. This task can involve processes which are much more complex than the simple identification of the diferent sentences in the text and each of their individual components, but it is often obviated in many current applications. Nevertheless, this preprocessing step is an indispensable task in practice, and it is particularly dificult to tackle it with scientific precision with-out falling repeatedly in the analysis of the specific casuistry of every phenomenon detected. In this work, we have developed a scheme of preprocessing oriented towards the disambiguation and robust tagging of Galician. Nevertheless, it is a proposal of a general architecture that can be applied to other languages, such as Spanish, with very slight modifications.
eng
Formal methods of tokenization for part-of-speech tagging
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/148/1/GranaCICLING2002.ps
File
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oai:ruc.udc.es:2183/1502018-10-19T08:20:15Zcom_2183_69com_2183_18428com_2183_4774col_2183_70
RUC. Repositorio da Universidade da Coruña
author
Vilares Ferro, Manuel
author
Otero Pombo, Juan
author
Graña Gil, Jorge
2005-10-28T15:43:41Z
2005-10-28T15:43:41Z
2005
Proceedings of the Sixth International Conference on Computational Linguistics and Intelligent Text Processing (CICLING-2005), Ciudad de Méjico (Méjico). Published in Lecture Notes in Computer Science, vol. 3406, pp.120-131. Springer Verlag. Gelbukh, A. (ed.).
3-540-24523-5
0302-9743
http://hdl.handle.net/2183/150
[Abstract] We focus on the domain of a regional least-cost strategy in order to illustrate the viability of non-global repair models over finitestate architectures. Our interest is justified by the difficulty, shared by all repair proposals, to determine how far to validate. A short validation may fail to gather sufficient information, and in a long one most of the effort can be wasted. The goal is to prove that our approach can provide, in practice, a performance and quality comparable to that attained by global criteria, with a significant saving in time and space. To the best of our knowledge, this is the first discussion of its kind.
eng
Regional versus global finite-state error repair
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/150/1/GranaCICLING2005.pdf
File
MD5
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URL
http://ruc.udc.es/dspace/bitstream/2183/150/3/GranaCICLING2005.pdf.txt
File
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oai:ruc.udc.es:2183/1512018-10-19T08:23:46Zcom_2183_69com_2183_18428com_2183_4774col_2183_70
RUC. Repositorio da Universidade da Coruña
author
Barcala Rodríguez, Francisco Mario
author
Sacristán Agulló, Oscar
author
Graña Gil, Jorge
2005-10-28T15:43:43Z
2005-10-28T15:43:43Z
2001
Proceedings of the Second International Conference on Computational Linguistics and Intelligent Text Processing (CICLING-2001), Ciudad de Méjico (Méjico). Gelbukh, A. (ed.).Lecture Notes in Computer Science, vol. 2004, pp. 401-410.
3-540-41687-0
0302-9743
http://hdl.handle.net/2183/151
[Abstract] Parsing CYK-like algorithms are inherently parallel: there are a lot of cells in the chart that can be calculated simultaneously. In this work, we present a study on the appropriate techniques of paralle-lism to obtain an optimal performance of the extended CYK algorithm, a stochastic parsing algorithm that preserves the same level of expressiveness as the one in the original grammar, and improves further tasks of robust parsing. We consider two methods of parallelization: distributed memory and shared memory. The excellent performance obtained with the second one turns this algorithm into an alternative that could compete with other parsing techniques more efficient a priori.
eng
Stochastic parsing and parallelism
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/151/1/GranaCICLING2001.ps
File
MD5
3b5e04cc93829a1fb3d0040c8a209df8
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oai:ruc.udc.es:2183/1702021-06-09T11:16:10Zcom_2183_167com_2183_18428com_2183_4774col_2183_169
RUC. Repositorio da Universidade da Coruña
author
Rubín Carrero, Eugenia
author
Rodríguez-Barro, Pilar
author
Brandariz, Isabel
author
Sastre de Vicente, Manuel
2005-10-28T18:16:40Z
2005-10-28T18:16:40Z
2004
International journal of chemical kinetics,2004, vol. 36, 12, p.650-660
1097-4601
http://hdl.handle.net/2183/170
[Abstract] A kinetic and equilibrium study of the addition reaction of hydroxide ions to nitroprusside has
been carried out in this paper. Rate and equilibrium constants at different salt concentrations
(up to 4 mol/kg) were obtained and the influence of ionic strength was studied by means of
Pitzer equations. This model is of special interest because it is able to explain the
experimental behaviour at high ionic strength, when Debye-Huckel limiting law is no longer
valid.
eng
Published in International journal of chemical kinetics
Nitroprusside
Hydroxide ions
Pitzer model
Kinetic and Equilibrium Study of the Reaction of Nitroprusside and Hydroxide Ions: Influence of Ionic Strength Using Pitzer Model
info:eu-repo/semantics/article
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
URL
https://ruc.udc.es/dspace/bitstream/2183/170/1/IJCK_revised1.pdf
File
MD5
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URL
https://ruc.udc.es/dspace/bitstream/2183/170/3/IJCK_revised1.pdf.txt
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1581d351f5beb07bec48c7a95e126865
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oai:ruc.udc.es:2183/1712016-06-14T11:23:12Zcom_2183_75com_2183_18428com_2183_4774col_2183_76oai:ruc.udc.es:2183/1742021-06-09T11:13:59Zcom_2183_167com_2183_18428com_2183_4774col_2183_169
RUC. Repositorio da Universidade da Coruña
author
Lodeiro, Pablo
author
Cordero Pérez, Bruno
author
Grille Cancela, Zulaika
author
Herrero, Roberto
author
Sastre de Vicente, Manuel
2005-11-04T19:09:31Z
2005-11-04T19:09:31Z
2004
Biotechnology and bioengineering,2004, vol. 88, iss. 2, p. 237-247
1097-0290
http://hdl.handle.net/2183/174
[Abstract] In recent years, there has been a significant increase in the studies concerning brown seaweed as biosorbents for metal removal owing to their high binding ability and low cost. This work reports the results of a study regarding the cadmium binding equilibria of dead biomass from the seaweed Sargassum muticum; this alga is a pest fouling organism that competes with the local fucalean species and may also interfere with the “sea industry”; therefore, it would constitute an ideal material to be used as biosorbent. Seven different treatments were tested in order to obtain a stable biomass that could be suitable for industrial use under a broad range of operational conditions. The treatments employed were protonation, chemical crosslinking with formaldehyde, KOH, Ca(OH)2 and CaCl2 or physical treatments with acetone and methanol. The equilibrium adsorption isotherms of Langmuir, Freundlich and Langmuir-Freundlich, were obtained for the quantitative description of the cadmium uptake. The effect of pH on biosorption equilibrium was studied at values ranging from 1 to 6, demonstrating the importance of this parameter for an accurate evaluation of the biosorption process. Maximum biosorption was found for pH higher than 4.5. The
1
maximum biosorption uptake for the raw biomass was 65 mg⋅g-1, while for formaldehyde crosslinking biomass the uptake increases to 99 mg⋅g-1 and for protonated biomass to 95mg⋅g-1. Potentiometric titrations were carried out to estimate the total number of weak acid groups and to obtain their apparent pK value, 3.85, using the Katchalsky model. Kinetic studies varying cadmium concentration, algal dose and ionic strength were carried out. Over 95% of the maximum cadmium uptake was achieved within 45 minutes, so the process can be considered relatively fast. A pseudo-second order model, for the kinetics of cadmium biosorption, showed to be able to reproduce experimental data points with accuracy.
eng
Published in Biotechnology and bioengineering
Biosorption
Sargassum muticum
Cadmium (II)
Kinetics
Equilibrium
Acid base properties
Crosslinking
Physicochemical Studies of Cadmium(II) Biosorption by the Invasive Alga in Europe, Sargassum Muticum
info:eu-repo/semantics/article
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URL
https://ruc.udc.es/dspace/bitstream/2183/174/1/sastre_biotech_bioeng.pdf
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oai:ruc.udc.es:2183/1732021-06-09T11:08:26Zcom_2183_167com_2183_18428com_2183_4774col_2183_169
RUC. Repositorio da Universidade da Coruña
author
Rey-Castro, Carlos
author
Herrero, Roberto
author
Sastre de Vicente, Manuel
2005-11-03T20:35:54Z
2005-11-03T20:35:54Z
2004
Journal of electroanalytical chemistry, 2004, vol. 564, p. 223-230
1572-6657
http://hdl.handle.net/2183/173
[Abstract] The apparent proton dissociation constants of a commercial alginic acid have been obtained in KNO3 and NaCl at concentrations ranging between 0.01 and 2 mol·L-1. An analysis of the dependence on the ionic strength at a constant value of the dissociation degree was done by means of empirical functions derived from the Gibbs-Donnan formalism for polyelectrolytes and a specific ion interaction theory (SIT). Both functions were able to fit the experimental data, although SIT yielded rather high errors in the fitted parameters due to a problem of multicollinearity, in contrast to the function derived from the Gibbs-Donnan approach.
eng
Potentiometry
Gibbs-Donnan model
Specific ion interaction theory
Alginic acid
Equilibrium constants
Gibbs-Donnan and Specific Ion Interaction Theory Descriptions of the Effect of Ionic Strength on Proton Dissociation of Alginic Acid
info:eu-repo/semantics/article
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URL
https://ruc.udc.es/dspace/bitstream/2183/173/1/Sastre_JEC.pdf
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URL
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oai:ruc.udc.es:2183/1752021-06-09T11:05:19Zcom_2183_167com_2183_18428com_2183_4774col_2183_169
RUC. Repositorio da Universidade da Coruña
author
Lodeiro, Pablo
author
Rey-Castro, Carlos
author
Barriada, José Luis
author
Sastre de Vicente, Manuel
author
Herrero, Roberto
2005-11-04T20:23:52Z
2005-11-04T20:23:52Z
2005
Journal of colloid interface science, 2005, vol. 289, iss. 2, p. 352-358
0021-9797
http://hdl.handle.net/2183/175
[Abstract] Protonated biomass of the seaweed Sargassum muticum was investigated for its ability to remove cadmium(II) from aqueous solutions. In this work, a non-ideal, semi-empirical, thermodynamically consistent (NICCA) isotherm was proposed to fit the experimental ion binding data obtained in NaNO3 0.05 mol·L-1. This model describes satisfactorily the competition between protons and metal ions. Moreover, it reflects the complexity of the macromolecular systems that take part in biosorption considering the heterogeneity of the sorbent. It was demonstrated in this work that NICCA isotherm constitutes a great improvement with respect to a simpler Langmuir competitive equation, which was not able to describe satisfactorily all the experimental data. Potentiometric acid-base titrations in absence of cadmium were made to estimate the maximum amount of acid functional groups (2.61 mmol·g-1), and the conditional proton binding parameters, logHK~ (3.8) and mH (0.54). The values of the binding parameters for the cadmium ion were chosen to provide the best simultaneous description of the isotherm at pH 4.5, as well as the dependence of cadmium adsorption on pH. Values of logCdK~ (3.1), nCd (1.8) and p (0.19) in the case of NICCA isotherm or log KCd (2.94-3.4) for Langmuir competitive models were obtained. Kinetic experiments were performed at two different pH values (3.0 and 4.5), establishing the time dependence that represents the sorption of cadmium with a pseudo-second-order kinetic model. It was observed that 4 hours are enough to ensure that the equilibrium uptake was reached.
eng
Biosorption
Algae
Cadmium
Sargassum muticum
Cross-link
NICCA
Biosorption of Cadmium by the Protonated Macroalga Sargasssum Muticum: Binding Analysis With a Non-Ideal, Competitive and Thermodynamically Consistent Adsorption (NICCA) Model
info:eu-repo/semantics/article
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URL
https://ruc.udc.es/dspace/bitstream/2183/175/1/sastre_jour_coll_inter_sci.pdf
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oai:ruc.udc.es:2183/1762021-10-04T11:58:55Zcom_2183_167com_2183_18428com_2183_4774col_2183_169
RUC. Repositorio da Universidade da Coruña
author
Lodeiro, Pablo
author
Cordero Pérez, Bruno
author
Barriada, José Luis
author
Herrero, Roberto
author
Sastre de Vicente, Manuel
2005-11-07T20:09:56Z
2005-11-07T20:09:56Z
2005-11-07
Bioresource Technology, 2005, 96, p.1796-1803
0960-8524
http://hdl.handle.net/2183/176
[Abstrac] Five different brown seaweeds, Bifurcaria bifurcata, Saccorhiza polyschides, Ascophyllum nodosum, Laminaria ochroleuca and Pelvetia caniculata were studied for their ability to remove cadmium from aqueous solution. Kinetic of cadmium adsorption by all the algae was relatively fast, 90% of total adsorption occurring in less than one hour. These experiments could be accuracy described by a pseudo-second order rate equation, obtaining for the rate constant sorption, k, values between 1.66·10-3 and 9.92·10-3 g/mg·min. The equilibrium adsorption isotherms of Langmuir, Langmuir-Freundlich, Tóth and Freundlich were obtained for the quantitative description of the cadmium uptake. The maximum metal biosorption capacity (qmax) and the affinity constant (b) for all the algae were evaluated employing the Langmuir isotherm. The values for qmax were between 64 and 95 mg/g, whiles b was included between 0.036 and 0.094 L/mg. Moreover, a dimensionless constant separation factor, Rs, was calculated founding a favourable condition for the sorption system.
1
The effect of pH on biosorption was studied at values ranging from 1 to 6, demonstrating the importance of this parameter for the removal of cadmium. Equilibrium studies were carried out at pH 4.5. Acid-base properties of algae were studied by potentiometry, leading to pK values (from 3.54 to 3.98), which are comparable with typical values associated to the ionization of carboxyl groups of alginates. Furthermore, the total number of these acid groups was estimated.
eng
Biosorption
Cadmium
Marine macroalgae
Kinetics
Equilibrium
Acid base properties
Biosorption of Cadmium by Biomass of Brown Marine Macroalgae
info:eu-repo/semantics/article
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URL
https://ruc.udc.es/dspace/bitstream/2183/176/1/sastre_bior_tech.pdf
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oai:ruc.udc.es:2183/1772021-06-09T10:53:11Zcom_2183_167com_2183_18428com_2183_4774col_2183_169
RUC. Repositorio da Universidade da Coruña
author
Herrero, Roberto
author
Lodeiro, Pablo
author
Rey-Castro, Carlos
author
Vilariño, Teresa
author
Sastre de Vicente, Manuel
2005-11-07T20:39:38Z
2005-11-07T20:39:38Z
2005
Water research, 2005, vol. 39, iss. 14, p. 3199-3210
0043-1354
http://hdl.handle.net/2183/177
[Abstract] The ability of Cystoseira baccata algal biomass to remove Hg(II) from aqueous solutions is investigated. The mercury biosorption process is studied through batch experiments at 25ºC with regard to the influence of contact time, initial mercury concentration, solution pH, salinity and presence of several divalent cations. The acid-base properties of the alga are also studied, since they are related to the affinity for heavy metals. The studies of the pH effect on the metal uptake evidence a sharp increasing sorption up to a pH value around 7.0, which can be ascribed to changes both in the inorganic Hg(II) speciation and in the dissociation state of the acid algal sites. The sorption isotherms at constant pH show uptake values as high as 178 mg.g-1 (at pH 4.5) and 329 mg.g-1 (at pH 6.0). The studies of the salinity influence on the Hg(II) sorption capacity of the alga exhibit two opposite effects depending on the electrolyte added; an increase in concentration of nitrate salts (NaNO3, KNO3) slightly enhances the metal uptake, on the contrary, the addition of NaCl salt leads to a drop in the sorption. The addition of different divalent cations to the mercury solution, namely Ca2+, Mg2+, Zn2+, Cd2+, Pb2+ and Cu2+, reveals that their effect on the uptake process is negligible. Finally, the equilibrium sorption results are compared with predictions 1
obtained from the application of a simple competitive chemical model, which involves a discrete proton binding constant and three additional constants for the binding of main neutral inorganic Hg(II) complexes, Hg(Cl)
HgOHCl and Hg(OH)2, to the algal surface sites.
eng
Marine macroalgae
Adsorption
Mercury
Cytoseira baccata
Removal of Inorganic Mercury From Aqueous Solutions by Biomass of the Marine Macroalga Cystoseira Baccata
info:eu-repo/semantics/article
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URL
https://ruc.udc.es/dspace/bitstream/2183/177/1/Sastre_WR.pdf
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URL
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oai:ruc.udc.es:2183/1782019-11-21T07:20:44Zcom_2183_167com_2183_18428com_2183_4774col_2183_169
RUC. Repositorio da Universidade da Coruña
author
Lodeiro, Pablo
author
Barriada, José Luis
author
Herrero, Roberto
author
Sastre de Vicente, Manuel
2005-11-08T20:30:33Z
2005-11-08T20:30:33Z
2005
0269-7491
http://hdl.handle.net/2183/178
[Abstract] This work reports kinetic and equilibrium studies of cadmium(II) and lead(II) adsorption by the brown seaweed Cystoseira baccata. Kinetic experiments demonstrated rapid metal uptake. Kinetic data were satisfactorily described by a pseudo-second order chemical sorption process. Temperature change from 15 to 45 ºC showed small variation on kinetic parameters. Langmuir-Freundlich equation was selected to describe the metal isotherms and the proton binding in acid-base titrations. The maximum metal uptake values were around 0.9 mmol•g-1 (101 and 186 mg•g-1 for cadmium(II) and lead(II), respectively) at pH 4.5 (raw biomass), while the number of weak acid groups were 2.2 mmol•g-1 and their proton binding constant, KH, 103.67 (protonated biomass). FTIR analysis confirmed the participation of carboxyl groups in metal uptake. The metal sorption was found to increase with the solution pH reaching a plateau above pH 4. Calcium and sodium nitrate salts in solution were found to affect considerably the metal biosorption.
eng
Biosorption
Marine macroalgae
Cadmium (II)
Lead(II)
Potentiometric titration
The marine macroalga Cystoseira baccata as biosorbent for cadmium(II) and lead(II) removal: kinetic and equilibrium studies
info:eu-repo/semantics/preprint
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URL
https://ruc.udc.es/dspace/bitstream/2183/178/1/versionfinalenvpolutacept.doc
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oai:ruc.udc.es:2183/1792019-11-21T07:22:12Zcom_2183_167com_2183_18428com_2183_4774col_2183_169
RUC. Repositorio da Universidade da Coruña
author
Herrero, Roberto
author
Cordero Pérez, Bruno
author
Lodeiro, Pablo
author
Rey-Castro, Carlos
author
Sastre de Vicente, Manuel
2005-11-09T19:27:43Z
2005-11-09T19:27:43Z
2005-11-09T19:27:43Z
0304-4203
http://hdl.handle.net/2183/179
[Abstract] Samples of dead biomass from the marine brown algae Fucus ceranoides, F. vesiculosus and F.serratus were studied for their ability to remove cadmium from aqueous solutions. The metal sorption process is rapid, with 90% of the metal uptake completed within the first 25 min. of contact. The kinetic data was described successfully by a pseudo second order chemical sorption process with rate constants of ca. 0.6 g·mmol-1·min-1. At pH 4.5, the raw biomass of the three species exhibited equilibrium uptake capacities for Cd as high as 0.8 mmol·g-1 (90 mg·g-1), on a dry weight basis, without chemical pretreatment. These sorption capacities are much higher than those reported for activated carbon and chitin. The sorption of Cd was found to increase as pH increases, reaching a plateau at pH 5. Batch sorption experiments and continuous potentiometric titrations of acid-treated biomass samples in 0.05M NaNO3 were used to derive thermodynamic binding parameters according to the NICCA model. The total amount of acid sites was 2.4-2.9 mmol·g-1, with median values of the affinity distribution for protons and cadmium ions, log HK~ and log CdK~, of 3.7 and 2.69 respectively (conditional values). The apparent heterogeneity of the sorbent was successfully taken into account by the empirical
1
NICCA isotherm, which described very well the competition between protons and metal ions, in contrast with a simpler discrete competitive Langmuir model. The experimental results demonstrate that these seaweeds constitute a promising, efficient, cheap and biodegradable sorbent biomaterial for cadmium removal from wastewaters. This use would represent an example of exploitation of a renewable marine resource in water treatment technologies for the prevention of heavy metal pollution in the environment.
eng
Heavy metals
Marine algae
Biosorption
Wastewater treatment
Potentiometric titration
Voltammetry
Interactions of Cadmium(II) and protons with dead biomass of marine algae Fucus sp
info:eu-repo/semantics/preprint
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https://ruc.udc.es/dspace/bitstream/2183/179/1/Sastre_mar_chem.pdf
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oai:ruc.udc.es:2183/1802019-11-21T07:09:42Zcom_2183_167com_2183_18428com_2183_4774col_2183_169
RUC. Repositorio da Universidade da Coruña
author
Rubín Carrero, Eugenia
author
Rodríguez-Barro, Pilar
author
Herrero, Roberto
author
Sastre de Vicente, Manuel
2005-11-09T20:03:52Z
2005-11-09T20:03:52Z
2005-11-09T20:03:52Z
0268-2575
http://hdl.handle.net/2183/180
[Abstract] Phenol, 2-chlorophenol (2-CP), and 4-chlorophenol (4-CP) biosorption on Sargassum muticum, an invasive macroalga in Europe, has been investigated. The efficiency of this biosorbent was studied measuring the equilibrium uptake using the batch technique. A chemical pre-treatment with CaCl2 has been employed in this study in order to improve the stability as well as the sorption capacity of the algal biomass. The influence of pH on the equilibrium binding and the effect of the algal dose were evaluated. The experimental data at pH=1 have been analysed using Langmuir and Freundlich isotherms. It was found that the maximum sorption capacity of chlorophenols, qmax=251 mg g-1 for 4-CP and qmax=79 mg g-1 for 2-CP, as well as that of a binary mixture of both chlorophenols, qmax=108 mg g-1, is much higher than that of phenol, qmax=4.6 mg g-1. Moreover, sorption kinetics have been performed and it was observed that the equilibrium was reached in less than 10 h. Kinetic data have been fitted to the first order Lagergren model, from which the rate constant and the sorption capacity were determined. Finally, biosorption of the phenolic compounds examined in the present study on Sargassum muticum biomass was observed to be correlated with the octanol-water partitioning coefficients of the phenols. This result allows us to postulate that hydrophobic interactions are the main responsible for the sorption equilibrium binding.
eng
Phenol
Monochlorophenol
Seaweed
Biosorption
Adsorption kinetics
Hydrophobicity
Biosorption of phenolic compounds by the brown alga Sargassum muticum
info:eu-repo/semantics/preprint
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URL
https://ruc.udc.es/dspace/bitstream/2183/180/1/finalaceptadafenol.doc
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oai:ruc.udc.es:2183/1812019-11-21T07:15:39Zcom_2183_167com_2183_18428com_2183_4774col_2183_169
RUC. Repositorio da Universidade da Coruña
author
Rubín Carrero, Eugenia
author
Rodríguez-Barro, Pilar
author
Herrero, Roberto
author
Cremades, Javier
author
Bárbara, Ignacio
author
Sastre de Vicente, Manuel
2005-11-09T20:27:27Z
2005-11-09T20:27:27Z
2005-11-09T20:27:27Z
0268-2575
http://hdl.handle.net/2183/181
[Abstract] Methylene blue adsorption on Sargassum muticum, an invasive macroalga in Europe, has been
investigated using visible absorption spectroscopy. Different pre-treatments, protonation and chemical
cross-linking with CaCl2 or H2CO, have been tested in order to improve the stability as well as the
adsorption capacity of the algal biomass. The equilibrium binding has been described in terms of
Langmuir or Freundlich isotherms depending on the algal pre-treatment; from the maximum
adsorption capacity values, an estimation of the algal specific surface area was made. Moreover, it
has been found that adsorption kinetics can be described according to the first order Lagergren model,
from which the rate constant and the adsorption capacity were determined. Finally, simple empirical
equations were obtained to evaluate the amount of methylene blue removed at any initial
concentration and reaction time. The results obtained have shown that this type of material has a high
adsorption capacity for methylene blue dye, this feature together with the short times needed to reach
the equilibrium suggest that Sargassum muticum can be used as a low-cost biosorbent in wastewater
treatments.
eng
Biosorption
Dye adsorption
Sargassum muticum
Isotherms
Adsorption kinetics
Removal of methylene blue from aqueous solutions using as biosorbent sargassum muticum: an invasive macroalga in Europe
info:eu-repo/semantics/preprint
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URL
https://ruc.udc.es/dspace/bitstream/2183/181/1/Main_Manuscript_Sastre_.pdf
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URL
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oai:ruc.udc.es:2183/2302021-09-24T09:14:23Zcom_2183_214com_2183_18428com_2183_4774col_2183_220
RUC. Repositorio da Universidade da Coruña
author
Sánchez Vila, Eduardo
author
Barro Ameneiro, Senén
author
Mariño Alfonso, Xurxo
author
Canedo Lamas, Antonio
author
Vázquez Muñíz, Pablo José
2005-11-17T18:02:28Z
2005-11-17T18:02:28Z
1999
International Work-Conference on Artificial and Natural Neural Networks, IWANN'99, Alicante, Spain, June 2-4, 1999 : proceedings, José Mira, Juan V. Sánchez-Andrés (eds.). Lecture notes in computer science, vol. 1606 (1999), p. 73-85
0302-9743
http://hdl.handle.net/2183/230
Experimental data recorded in cat "in vivo" offer a new picture of the cuneate nucleus. Clasically definied as a simple relay station, the cuneate nucleus is currently seen as a fundamental stage in somatosensory information processing. Intracellular and extracellular recordings have revealed a complex circuitry estabished by cuneothalamic cells, interneurons and afferent fibers from the sensorimotor cortex. As a result of electrophysiological work, some circuits have been hypothesized in order to explain the data. In this paper we present a computational model designed and developed in order to test the validity of the proposed circuit in [15]. The results of the computer simulations support the predictions.
eng
The original
publication is available at www.springerlink.com
Modelling the circuitry of the cuneate nucleus
info:eu-repo/semantics/article
URL
https://ruc.udc.es/dspace/bitstream/2183/230/1/lncs1999.pdf
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oai:ruc.udc.es:2183/2312016-06-28T10:23:42Zcom_2183_214com_2183_18428com_2183_4774col_2183_220
RUC. Repositorio da Universidade da Coruña
author
Mariño Alfonso, Xurxo
author
Martínez Otero, Luis Miguel
author
Canedo Lamas, Antonio
2005-11-17T18:02:31Z
2005-11-17T18:02:31Z
1996
Neuroscience letters, 219 (1996), p. 107-110
0304-3940
http://hdl.handle.net/2183/231
Simultaneous recordings were obtained from cuneothalamic (extracellular) and thalamocortical (intracellular) cells in chloralose
anesthetized cats. It was found that cuneothalamic neurons present slow rhythmicity (0.1–1 Hz) tightly coupled to slow oscillations of
thalamocortical neurons. This coupling was not due to a direct synaptic linkage but rather produced by other (s) structure (s) probably
the cortex. Furthermore, the cuneothalamic neurons also showed delta rhythms (1–4 Hz) coherently oscillating with the delta rhythms of
thalamocortical cells which suggests that these rhythms are more widespread than previously thought, and may be a general phenomenon
characterizing quiet sleep in multiple structures.
eng
Cuneate nucleus
Ventroposterolateral thalamic nucleus
Simultaneous recording
Cat
Coupled slow and delta oscillations between cuneothalamic and
thalamocortical neurons in the chloralose anesthetized cat
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/231/1/neuroscilett.pdf
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oai:ruc.udc.es:2183/2352016-06-28T10:23:45Zcom_2183_214com_2183_18428com_2183_4774col_2183_220
RUC. Repositorio da Universidade da Coruña
author
Sánchez Vila, Eduardo
author
Barro Ameneiro, Senén
author
Mariño Alfonso, Xurxo
author
Canedo Lamas, Antonio
2005-11-17T18:02:43Z
2005-11-17T18:02:43Z
2001
6th International Work-Conference on Artificial and Natural Neural Networks, IWANN 2001, Granada, Spain, June 13-15, 2001 : proceedings, José Mira, Alberto Prieto (eds.). Lecture notes in computer science, vol. 2084, p. 21-29
0302-9743
http://hdl.handle.net/2183/235
Intracellular recordings obtained under cutaneous and lemniscal
stimulation show that the afferent fibers can establish excitatory
and inhibitory synaptic connections with cuneothalamic neurons [5]. In
addition, distinct types of recurrent collaterals with the capability of either
exciting or inhibiting both cuneothalamic neurons and interneurons
were also discovered [6]. With these data we have generated hypothesis
about which circuits are implicated and also developed realistic computational
models to test the hypothesis and study the cuneate properties
[17,18]. The results show that the cuneate could perform spatial and
temporal filtering and therefore detect dynamic edges.
eng
The original publication is avaliable at www.springerlink.com
A realistic computational model of the local circuitry of the cuneate nucleus
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/235/1/lncs2001.pdf
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oai:ruc.udc.es:2183/2362016-06-28T10:23:43Zcom_2183_214com_2183_18428com_2183_4774col_2183_220
RUC. Repositorio da Universidade da Coruña
author
Mariño Alfonso, Xurxo
author
Aguilar Fernández, Jaime
author
Soto, C.
author
Canedo Lamas, Antonio
2005-11-17T18:02:46Z
2005-11-17T18:02:46Z
2001
Revisiones en neurociencia, vol. 33, n. 5, p. 448-454
http://hdl.handle.net/2183/236
The mechanisms used by the cerebral cortex to modulate the cutaneous information at prethalamic level
have been scarcely studied. This article reviews experimental evidence leading to a better understanding of this issue at the level
of the cuneate nucleus (Burdach nucleus). Development. The primary afferents and the corticocuneate fibers make synaptic
contact with cuneothalamic neurons and with inhibitory interneurons in the middle cuneate nucleus. By stimulating the skin at
different places while recording the cuneothalamic intracellular activity in anaesthetized animals with the cortex intact, with
the cortex pharmacologically inactivated, or in absence of a cerebral cortex it was possible to ascertain the functional role of
the corticocuneate fibers. The primary afferents activated by stimulating a particular zone of the skin induce monosynaptic
excitation on a group of cuneothalamic cells at the same time at which inhibit, through intranuclear interneurons, neighboring
cuneothalamic cells with unmatched receptive fields. Similarly, the corticocuneate cells receiving information from the stimulated skin
further increase the excitation of the cuneothalamic neurons with matched receptive fields while inhibiting others with unmatched fields.
The cortex exaggerates an excited center surrounded by an inhibited periphery thus increasing the tactile discrimination both spatially
and temporally which is essential for exploratory and manipulative purposes
spa
Cortical modulation
Cuneate nucleus
Cuneothalamic neurons
Cutaneous transmission
Sensorimotor cortex
Ventroposterolateral thalamic nucleus
La corteza cerebral modula la transmisión cutánea
a través de los núcleos de los cordones posteriores
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/236/1/revneurol2001.pdf
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URL
http://ruc.udc.es/dspace/bitstream/2183/236/3/revneurol2001.pdf.txt
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oai:ruc.udc.es:2183/2372021-06-09T10:44:40Zcom_2183_214com_2183_18428com_2183_4774col_2183_220
RUC. Repositorio da Universidade da Coruña
author
Schummers, James
author
Mariño Alfonso, Xurxo
author
Sur, Mriganka
2005-11-17T18:02:49Z
2005-11-17T18:02:49Z
2002
Schummers J, Mariño J, Sur M. Synaptic integration by V1 neurons depends
on location within the orientation map. Neuron. 2002;36(5):969-978
0896-6273
http://hdl.handle.net/2183/237
[Abstract] Neurons in the primary visual cortex (V1) are organized
into an orientation map consisting of orientation domains arranged radially around “pinwheel centers” at
which the representations of all orientations converge. We have combined optical imaging of intrinsic signals
with intracellular recordings to estimate the subthreshold inputs and spike outputs of neurons located
near pinwheel centers or in orientation domains. We find that neurons near pinwheel centers have subthreshold
responses to all stimulus orientations but spike responses to only a narrow range of orientations.
Across the map, the selectivity of inputs covaries with the selectivity of orientations in the local cortical network,
while the selectivity of spike outputs does not. Thus, the input-output transformation performed by
V1 neurons is powerfully influenced by the local structure of the orientation map.
eng
Synaptic Integration by V1 Neurons Depends
on Location Within the Orientation Map
info:eu-repo/semantics/article
URL
https://ruc.udc.es/dspace/bitstream/2183/237/4/Schummers_Synaptic.pdf
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URL
https://ruc.udc.es/dspace/bitstream/2183/237/3/neuron_xurxo.pdf.txt
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URL
https://ruc.udc.es/dspace/bitstream/2183/237/5/Schummers_Synaptic.pdf.txt
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oai:ruc.udc.es:2183/2382021-06-09T10:42:11Zcom_2183_214com_2183_18428com_2183_4774col_2183_220
RUC. Repositorio da Universidade da Coruña
author
Sánchez Vila, Eduardo
author
Barro Ameneiro, Senén
author
Mariño Alfonso, Xurxo
author
Canedo Lamas, Antonio
2005-11-17T18:02:52Z
2005-11-17T18:02:52Z
2003
Network: computational in neural systems, vol. 14 (2003), p. 211-231
0954-898X
http://hdl.handle.net/2183/238
[Abstract] The dorsal column nuclei, cuneatus and gracilis, play a fundamental role
in the processing and integration of somesthetic ascending information.
Intracellular and patch-clamp recordings obtained in cat in vivo have shown that
cuneothalamic projection neurons present two modes of activity: oscillatory
and tonic (Canedo et al 1998 Neuroscience 84 603–17). The former is the basis
of generating, in sleep and anaesthetized states, slow, delta and spindle rhythms
under the control of the cerebral cortex (Mari˜no et al 2000 Neuroscience 95
657–73). The latter is needed, during wakefulness, to process somesthetic
information in real time. To study this behaviour we have developed the
first realistic computational model of the cuneothalamic projection neurons.
The modelling was guided by experimental recordings, which suggest the
existence of hyperpolarization-activated inward currents, transient low- and
high-threshold calcium currents, and calcium-activated potassium currents.
The neuronal responses were simulated during (1) sleep, (2) transition from
sleep to wakefulness and (3) wakefulness under both excitatory and inhibitory
synaptic input. In wakefulness the model predicts a set of synaptically driven
firing modes that could be associated with information processing strategies in
the middle cuneate nucleus.
eng
A Computational Model of Cuneothalamic Projection Neurons
info:eu-repo/semantics/article
URL
https://ruc.udc.es/dspace/bitstream/2183/238/1/network2003.pdf
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URL
https://ruc.udc.es/dspace/bitstream/2183/238/3/network2003.pdf.txt
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oai:ruc.udc.es:2183/2392022-09-28T18:04:50Zcom_2183_214com_2183_18428com_2183_4774col_2183_220
RUC. Repositorio da Universidade da Coruña
author
Mariño Alfonso, Xurxo
author
Cudeiro, Javier
2005-11-17T18:02:55Z
2005-11-17T18:02:55Z
2003
Mariño J, Cudeiro J. Nitric oxide-mediated cortical activation: a diffuse wake-up system. J Neurosci. 2003;23(10):4299-4307.
0306-4522
http://hdl.handle.net/2183/239
Nitric oxide (NO) has been implicated in some of the central pathways engaged in the regulation of the sleep–wake cycle. The existence of
nitric oxide synthase (NOS) in the cholinergic basal forebrain (BF) cells projecting to the cortex suggests a role for NO in the activation
induced by the BF during arousal. We tested, in the anesthetized cat, the hypothesis that inhibition of NOS would decrease the ability of
BFcholinergic fibers to induce cortical activation. In control conditions,BFstimulation evoked an awake-likeEEGpattern (i.e., a decrease
in the low-frequency– high-amplitude oscillatory activity and an increase in the high-frequency–low-amplitude activity). After blocking
NOS activity, the capacity of BF stimulation to induce cortical activation was strongly impaired. Furthermore, voltammetric measurements
of NO levels revealed an increase in cortical NO after BF stimulation, also blocked by systemic NOS inhibition. These results
indicate that the blockade of NOS activity significantly reduces the ability of BF stimulation to induce changes in the EEG pattern and
suggest a role for NO in the BF–cholinergic system implicated in arousal mechanisms.
eng
Basal forebrain
Sleep-wake cycle
V1
ACh
Nitro-arginine
Nitroindazole
Nitric oxide-mediated cortical activation: a diffuse
wake-up system
info:eu-repo/semantics/article
URL
https://ruc.udc.es/dspace/bitstream/2183/239/1/jneurosci03.pdf
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URL
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oai:ruc.udc.es:2183/2402016-06-28T10:23:38Zcom_2183_214com_2183_18428com_2183_4774col_2183_220
RUC. Repositorio da Universidade da Coruña
author
Mariño Alfonso, Xurxo
author
Schummers, James
author
Sur, Mriganka
2005-11-17T18:02:58Z
2005-11-17T18:02:58Z
2003
Revisiones en neurociencia, vol. 36(2003), n. 10, p. 944-950
http://hdl.handle.net/2183/240
This work summarizes current research focused on explaining orientation selectivity of primary visual
cortex (V1), and describes the electrophysiological and imaging techniques than are being used. Development. The study of
orientation selectivity in V1 is key to understanding the cortical mechanisms implicated in the processing of sensory information,
but this enterprise has proved more challenging than previously thought and there is no consensus about the best model to explain
V1 neurons’ activity. Ongoing research is focused on determining the importance of the different inputs that a cortical cell receives
(thalamic and lateral cortical inputs), and their link to cortical architecture. To achieve that, current research is combining optical
imaging techniques with intracellular recordings of V1 neurons. Recent findings have found differences in the synaptic integration
performed by neurons located in the iso-orientation domains vs orientation centers of the functional V1 map. Conclusions. Data
describing synaptic activity combined with the cortical functional structure are yielding new clues about V1 computation, suggesting
that there is more than one mechanism capable of generating orientation selectivity
spa
Optical imaging of intrinsic signals
Orientation map
Primary visual cortex
Synaptic effects
V1
Combinación de nuevas técnicas electrofisiológicas y de imagen
en el estudio de la función de la corteza visual primaria
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/240/1/revneurol03.pdf
File
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URL
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oai:ruc.udc.es:2183/2462016-06-28T10:23:39Zcom_2183_214com_2183_18428com_2183_4774col_2183_220
RUC. Repositorio da Universidade da Coruña
author
Sánchez Vila, Eduardo
author
Barro Ameneiro, Senén
author
Mariño Alfonso, Xurxo
author
Canedo Lamas, Antonio
2005-11-17T18:51:05Z
2005-11-17T18:51:05Z
2003
7th International Work-Conference on Artificial and Natural Neural Networks, IWANN 2003, Menorca, Spain, June 3-6, 2003 : proceedings, José Mira, José R. Álvarez (eds.). Lecture notes in computer science, vol. 2686 (2003), p. 70-77
0302-9743
http://hdl.handle.net/2183/246
We present a computational study about the influence of the
sensorimotor cortex on the processing of the cuneate nucleus during sleep
as well as wakefulness. Realistic computational models were developed
supported by experimental data obtained from intact-brain preparations
in cat. Furthermore, a physiologically plausible circuit is proposed and
predictions under both different cortical stimulation and synaptic configurations are suggested. The computer simulations show that the CN
circuitry (1) under sleep conditions can block the transmission of afferent
sensory information, and (2) under awaking conditions can perform
operations such as filtering and facilitation.
eng
The original publication is avaliable at www.springerlink.com
Sleep and wakefulness in the cuneate nucleus: a
computational study
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/246/1/lncs2003.pdf
File
MD5
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URL
http://ruc.udc.es/dspace/bitstream/2183/246/3/lncs2003.pdf.txt
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oai:ruc.udc.es:2183/2472016-06-14T11:23:15Zcom_2183_241com_2183_18428com_2183_4774col_2183_242oai:ruc.udc.es:2183/2482016-06-28T10:25:05Zcom_2183_241com_2183_18428com_2183_4774col_2183_242
RUC. Repositorio da Universidade da Coruña
author
Iglesias, Emilia
2005-11-21T10:07:58Z
2005-11-21T10:07:58Z
2005
New Journal of Chemistry, 2005, 29, p. 457-464
http://hdl.handle.net/2183/248
The kinetic study of the keto-enol interconversion of 2-acetylcyclohexanone (ACHE) has been performed in organic solvents such as dimethylsulfoxide (DMSO), 1-propanol (1-PrOH), 2-propanol (2-PrOH), methanol (MeOH), dioxane, tetrahydrofuran (THF), and acetonitrile (MeCN) and in aqueous micellar solutions of the cationic surfactants tetradecyltrimethylammonium chloride (TTACl) and tetradecyltrimethylammonium bromide (TTABr) at 25 ºC. Either the solvent-assisted or H+-catalysed reaction rates of tautomerization are strongly reduced in both organic solvents and in micellar medium. In 70% v/v solvent-water or at fixed concentration of any cationic surfactant, the observed rate constant moderately increases with [H+]. The nitrosation of the enol has also been studied in micellar solutions of both cationic and anionic surfactants. Under experimental conditions of first-order dependence on [H+], [nitrite], and [X-] (X-= Cl- or Br-), the presence of cationic micelles reduces strongly the rate of nitrosation, whereas, in the presence of anionic micelles, the first-order rate constant, ko, goes through maxima on increasing the surfactant concentration.
eng
Acetylcyclohexanone, cationic surfactants, nitrosation, organic solvents
Tautomerization of 2-acetylcyclohexanone in assemblies of cationic surfactants. Nitrosation of the enol.
info:eu-repo/semantics/article
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
URL
http://ruc.udc.es/dspace/bitstream/2183/248/1/NewJC1-05.pdf
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oai:ruc.udc.es:2183/1602018-10-19T08:29:35Zcom_2183_69com_2183_18428com_2183_4774col_2183_71
RUC. Repositorio da Universidade da Coruña
author
Vilares Ferro, Manuel
author
Otero Pombo, Juan
author
Graña Gil, Jorge
2005-11-21T13:22:50Z
2005-11-21T13:22:50Z
2005
Quesada-Arencibia, A.; Moreno-Díaz, R.; Rodríguez, J.-C. (eds.), Proceedings of Tenth International Conference on Computer Aided Systems Theory (EUROCAST-2005), Las Palmas (Spain), pp. 73-76.
84-689-0432-5
http://hdl.handle.net/2183/160
[Abstract] We describe a novel approach to spelling correction applied on technical documents, a task that requires a number of especific properties such as eficiency, safety and maintenance. In opposite to previous works, we explore the region close to the point at which the recognition halts, gathering all relevant information for the repair process in order to avoid the phenomenom of errors in cascade. Our approach seems to reach the same quality provided by the most performance classic techniques, but with a significant reduction on both time and space costs
eng
Spelling correction on technical documents
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/160/1/GranaEUROCAST2005.ps
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GranaEUROCAST2005.ps
oai:ruc.udc.es:2183/1612021-06-25T11:11:25Zcom_2183_69com_2183_18428com_2183_4774col_2183_71
RUC. Repositorio da Universidade da Coruña
author
Vilares Ferro, Manuel
author
Graña Gil, Jorge
author
Araújo, T.
author
Cabrero, David
author
Diz, I.
2005-11-21T13:22:54Z
2005-11-21T13:22:54Z
1998
Proceedings of the First International Conference on Language Resources and Evaluation - Workshop on Language Resources for European Minority Languages (LREC-1998), Granada (Spain).
http://hdl.handle.net/2183/161
[Abstract] In this paper, we introduce a tagger environment for Galician, the native language of Galicia. Galician belongs to the group of Romance languages which developed from the Latin imposed on the north-west of the Iberian Peninsula by the Romans, with additions from the languages of peoples living here before the colonization, as well as contributions from other languages subsequent to the breaking-up of the Roman Empire.
Various historical circumstances led to its not becoming a State language and although it was relegated to informal usage, our vernacular has managed to survive well into the twentieth century when, parallel to the recovery of the institutions for self-government, Galician was once again granted the status of official language for Galicia, together with the Spanish language.
From an operational point of view, our proposal is based on the notion of finite automaton, separating the execution strategy from the implementation of the tagging interpreter. That facilitates the maintenance at the time that assures the robustness of the architecture. Empirical tests prove the validity of our approach to deal with a language whose morphology is non-trivial.
eng
Tagging
User Interface
Maintenance
A tagger environment for Galician
info:eu-repo/semantics/article
URL
https://ruc.udc.es/dspace/bitstream/2183/161/3/GranaLREC1998.pdf
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URL
https://ruc.udc.es/dspace/bitstream/2183/161/4/GranaLREC1998.pdf.txt
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GranaLREC1998.pdf.txt
oai:ruc.udc.es:2183/1522018-10-19T08:25:21Zcom_2183_69com_2183_18428com_2183_4774col_2183_71
RUC. Repositorio da Universidade da Coruña
author
Vilares Ferro, Manuel
author
Otero Pombo, Juan
author
Graña Gil, Jorge
2005-11-21T13:22:57Z
2005-11-21T13:22:57Z
2004
In Proceedings of the Ninth International Conference on Implementation and Application of Automata (CIAA-2004), Kingston, Ontario (Canada). To appear in Lecture Notes in Computer Science
0302-9743
http://hdl.handle.net/2183/152
[Abstract] We describe an algorithm to deal with error repair over finite-state architectures. Such a technique is of interest in spelling correction as well as approximate string matching in a variety of applications related to natural language processing, such as information extraction/recovery or answer searching, where error-tolerant recognition allows misspelled input words to be integrated in the computational process. Our proposal relies on a regional least-cost repair strategy, dynamically gathering all relevant information in the context of the error location. The system guarantees asymptotic equivalence with global repair strategies.
eng
Regional finite-state error repair
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/152/1/GranaCIAA2004.ps
File
MD5
264412120a28bac4439791fe3c05760d
590916
application/postscript
GranaCIAA2004.ps
oai:ruc.udc.es:2183/1642018-10-19T08:34:36Zcom_2183_69com_2183_18428com_2183_4774col_2183_71
RUC. Repositorio da Universidade da Coruña
author
Graña Gil, Jorge
author
Vilares Ferro, Manuel
author
Bernhard, R.
2005-11-21T13:22:59Z
2005-11-21T13:22:59Z
1995
Proceedings of the Second International Conference on Software Engineering in Higher Education (SEHE-1995), Alicante (Spain). pp. 255-265.
1-56252-309-0
http://hdl.handle.net/2183/164
[Abstract] This work summarizes design, implementation and verification processes of a digital telephone switchboard in the Esterel real-time programming environment. Our aim is to show the modularity in the description and of flexibility in the verification process.
We also show the control synchronization mechanisms to coordinate concurrent processes. The goal is to prevent in compile-time deadlock and lockout phenomena, a feature that is not available in most programming languages.
eng
Synchronous programming
Reactive systems
Automata verification
Communication protocols verification with Esterel
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/164/1/GranaSEHE1995.ps
File
MD5
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GranaSEHE1995.ps
oai:ruc.udc.es:2183/1572018-10-19T08:27:39Zcom_2183_69com_2183_18428com_2183_4774col_2183_71
RUC. Repositorio da Universidade da Coruña
author
Graña Gil, Jorge
author
Vilares Ferro, Manuel
author
Bernhard, R.
2005-11-21T13:23:02Z
2005-11-21T13:23:02Z
1995
Troya Linero, J.; Rodríguez León, C. (eds.), Actas de las I Jornadas de Informática de la Asociación Española de Informática y Automática (AEIA-1995), Puerto de la Cruz (Spain), pp. 707-708.
http://hdl.handle.net/2183/157
[Resumen] El presente trabajo resume el proceso de diseño, implementación y verificación del comportamiento de una centralita telefónica digital en el entorno de programación de tiempo real síncrono Esterel. Nuestra intención es mostrar la modularidad de la aplicación y la flexibilidad del proceso de verificación.
Idéntica atención merecen los mecanismos de control que gestionan la sincronización de procesos concurrentes. El objetivo es detectar los fenómenos de abrazo mortal e interbloqueo en tiempo de compilación, una característica no disponible en todos los lenguajes de programación.
spa
Programación síncrona
Sistemas reactivos
Verificación de autómatas
Verificación de conexiones telefónicas con esterel
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/157/1/GranaAEIA1995.ps
File
MD5
d9deb36ea23c63d296f65c3dca01a69f
1096073
application/postscript
GranaAEIA1995.ps
oai:ruc.udc.es:2183/1532022-07-13T12:13:42Zcom_2183_69com_2183_18428com_2183_4774col_2183_71
RUC. Repositorio da Universidade da Coruña
author
Barcala Rodríguez, Francisco Mario
author
Domínguez, Eva María
author
Alonso, Miguel A.
author
Cabrero, David
author
Graña Gil, Jorge
author
Vilares, Jesús
author
Vilares Ferro, Manuel
author
Rojo, Guillermo.
author
Santalla, María Paula
author
Sotelo, Susana
2005-11-21T13:23:04Z
2005-11-21T13:23:04Z
2002
In Sanchis, E.; Moreno, L.; Gil, I. (eds.), Actas de las I Jornadas de Tratamiento y Recuperación de Información (JOTRI-2002), Valencia (Spain), pp. 173-174.
84-9705-199-8
http://hdl.handle.net/2183/153
spa
El sistema ERIAL: LEIRA, un entorno para RI basado en PLN
info:eu-repo/semantics/article
URL
https://ruc.udc.es/dspace/bitstream/2183/153/1/GranaJOTRIDemo2002.ps
File
MD5
38d902591ff862f1f801ee5e4ef67bbf
213280
application/postscript
GranaJOTRIDemo2002.ps
oai:ruc.udc.es:2183/1632018-10-19T08:33:36Zcom_2183_69com_2183_18428com_2183_4774col_2183_71
RUC. Repositorio da Universidade da Coruña
author
Graña Gil, Jorge
author
Chappelier, J. C.
author
Vilares Ferro, Manuel
2005-11-21T13:23:07Z
2005-11-21T13:23:07Z
2001
Angelova, G.; Bontcheva, K.; Mitkov, R.; Nicolov, N.; Nikolov, N. (eds.), Proceedings of the Euroconference on Recent Advances in Natural Language Processing (RANLP-2001), Tzigov Chark (Bulgaria), pp. 122-128.
954-90906-1-2
http://hdl.handle.net/2183/163
[Abstract] The highest performances in part-of-speech tagging have been obtained by using stochastic methods, such as hidden Markov models. The running parameters of a hidden Markov model for tagging can be estimated from tagged corpora. However, the current situation in the automatic processing of some languages is very short training texts, but very large dictionaries. These dictionaries can provide very useful information for improving the treatment of unknown words. In this paper we present new strategies for integrating external dictionaries into a stochastic tagging framework. Instead of the most intuitive Adding One method, we propose the use of the Good-Turing formulas, which produce less distortion of the model we are estimating. This technique guarantees good performances in the automatic processing of languages for which reference texts hardly exist.
eng
Integrating external dictionaries into Part-of-speech taggers
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/163/1/GranaRANLP2001.ps
File
MD5
1db87e0501fa76bb449f248199ee23e2
187705
application/postscript
GranaRANLP2001.ps
oai:ruc.udc.es:2183/1562019-10-24T08:58:33Zcom_2183_69com_2183_18428com_2183_4774col_2183_71
RUC. Repositorio da Universidade da Coruña
author
Vilares Ferro, Manuel
author
Graña Gil, Jorge
2005-11-21T13:23:09Z
2005-11-21T13:23:09Z
1993
Proceedings of the First Compulog Network Area Meeting on Parallelism and Implementation Technologies (COMPULOG-NOE-1993), Madrid (Spain)
http://hdl.handle.net/2183/156
[Abstract] A general context-free parsing algoritm based on logical dynamic programming techniques is described. The analyzer takes a general class of context-free grammar as drivers, and any finite string as input. In an empirical comparison, the new system appears to be superior to the others context-free analysers (as for example the SDF system), and comparable to the standard generators of deterministic parsers (as for example YACC, the standard generator of compilers in UNIX) when the input string is not ambiguous.
eng
Context-Free Parsing
Dynamic programming
Horn clauses
Earley deduction
Definite clause programs
Logical Push-Down Automata
Parsing as resolution
info:eu-repo/semantics/article
URL
http://ruc.udc.es/dspace/bitstream/2183/156/1/GranaCOMPULOGNOE1993.ps
File
MD5
c4368afee8d0d38eb41b715241a04369
78226
application/postscript
GranaCOMPULOGNOE1993.ps
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