An ecosystem approach for the assessment of fisheries impacts on marine top-predators: the Bay of Biscay case study

A number of marine mammal populations is currently threatened by their interactions with fisheries. The present study aimed to provide insights into the severity of potential impacts of operational and biological interactions between top predators and fisheries, in the Bay of Biscay region. Our appr...

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Autores: Lassalle, G., Gascuel, Didier, Le-Loc'h, F., Lobry, J., Pierce, Graham J., Ridoux, Vincent, Santos, María Begoña, Spitz, ‪Jérôme, Niquil, Nathalie
Formato: artículo
Fecha de publicación:2012
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/328063
Acesso em linha:http://hdl.handle.net/10261/328063
Access Level:acceso abierto
Palavra-chave:Pesquerías
Centro Oceanográfico de Vigo
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spelling An ecosystem approach for the assessment of fisheries impacts on marine top-predators: the Bay of Biscay case studyLassalle, G.Gascuel, DidierLe-Loc'h, F.Lobry, J.Pierce, Graham J.Ridoux, VincentSantos, María BegoñaSpitz, ‪JérômeNiquil, NathaliePesqueríasCentro Oceanográfico de VigoA number of marine mammal populations is currently threatened by their interactions with fisheries. The present study aimed to provide insights into the severity of potential impacts of operational and biological interactions between top predators and fisheries, in the Bay of Biscay region. Our approach was to modify an Ecopath with Ecosim (EwE) model describing the overall structure and function of the ecosystem by including landings and discards of exploited stocks and estimations of the bycatch of non-target compartments. Second, a set of ecological indices and a trophic level (TL)-based model (EcoTroph, ET) were derived from the EwE model. ET was used to simulate the effects of increasing fishing pressure on the ecosystem and, more particularly, on top predators. The Bay of Biscay was demonstrated to be not far from overexploitation at the current fishing rate, this phenomenon being particularly noticeable for the highest TLs. Within the toothed cetacean community, bottlenose dolphins appeared the most sensitive to resource depletion, whereas common dolphins and harbour porpoises were most impacted by their incidental captures in fishing gears. This study provides a methodological framework to assess the impacts of fisheries on ecosystems for which EwE, or other ecosystem models, already exist.Sí202320232012info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/328063reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésCentro Oceanográfico de Vigoinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3280632026-05-22T06:33:51Z
dc.title.none.fl_str_mv An ecosystem approach for the assessment of fisheries impacts on marine top-predators: the Bay of Biscay case study
title An ecosystem approach for the assessment of fisheries impacts on marine top-predators: the Bay of Biscay case study
spellingShingle An ecosystem approach for the assessment of fisheries impacts on marine top-predators: the Bay of Biscay case study
Lassalle, G.
Pesquerías
Centro Oceanográfico de Vigo
title_short An ecosystem approach for the assessment of fisheries impacts on marine top-predators: the Bay of Biscay case study
title_full An ecosystem approach for the assessment of fisheries impacts on marine top-predators: the Bay of Biscay case study
title_fullStr An ecosystem approach for the assessment of fisheries impacts on marine top-predators: the Bay of Biscay case study
title_full_unstemmed An ecosystem approach for the assessment of fisheries impacts on marine top-predators: the Bay of Biscay case study
title_sort An ecosystem approach for the assessment of fisheries impacts on marine top-predators: the Bay of Biscay case study
dc.creator.none.fl_str_mv Lassalle, G.
Gascuel, Didier
Le-Loc'h, F.
Lobry, J.
Pierce, Graham J.
Ridoux, Vincent
Santos, María Begoña
Spitz, ‪Jérôme
Niquil, Nathalie
author Lassalle, G.
author_facet Lassalle, G.
Gascuel, Didier
Le-Loc'h, F.
Lobry, J.
Pierce, Graham J.
Ridoux, Vincent
Santos, María Begoña
Spitz, ‪Jérôme
Niquil, Nathalie
author_role author
author2 Gascuel, Didier
Le-Loc'h, F.
Lobry, J.
Pierce, Graham J.
Ridoux, Vincent
Santos, María Begoña
Spitz, ‪Jérôme
Niquil, Nathalie
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Pesquerías
Centro Oceanográfico de Vigo
topic Pesquerías
Centro Oceanográfico de Vigo
description A number of marine mammal populations is currently threatened by their interactions with fisheries. The present study aimed to provide insights into the severity of potential impacts of operational and biological interactions between top predators and fisheries, in the Bay of Biscay region. Our approach was to modify an Ecopath with Ecosim (EwE) model describing the overall structure and function of the ecosystem by including landings and discards of exploited stocks and estimations of the bycatch of non-target compartments. Second, a set of ecological indices and a trophic level (TL)-based model (EcoTroph, ET) were derived from the EwE model. ET was used to simulate the effects of increasing fishing pressure on the ecosystem and, more particularly, on top predators. The Bay of Biscay was demonstrated to be not far from overexploitation at the current fishing rate, this phenomenon being particularly noticeable for the highest TLs. Within the toothed cetacean community, bottlenose dolphins appeared the most sensitive to resource depletion, whereas common dolphins and harbour porpoises were most impacted by their incidental captures in fishing gears. This study provides a methodological framework to assess the impacts of fisheries on ecosystems for which EwE, or other ecosystem models, already exist.
publishDate 2012
dc.date.none.fl_str_mv 2012
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/328063
url http://hdl.handle.net/10261/328063
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Centro Oceanográfico de Vigo
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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