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Provedor de dados:  ArchiMer
País:  France
Título:  An ecosystem approach for the assessment of fisheries impacts on marine top predators: the Bay of Biscay case study
Autores:  Lassalle, Geraldine
Gascuel, Didier
Le Loch, Francois
Lobry, Jeremy
Pierce, Graham John
Ridoux, Vincent
Santos, Maria Begona
Spitz, Jerome
Niquil, Nathalie
Data:  2012-07
Ano:  2012
Palavras-chave:  Ecopath
Ecosystem modelling
Fisheries impacts
Marine mammals
Trophic level
Resumo:  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.
Tipo:  Text
Idioma:  Inglês

Editor:  Oxford Univ Press
Relação:  info:eu-repo/grantAgreement/EC/FP7/244966/EU//FACTS
Formato:  application/pdf
Fonte:  Ices Journal Of Marine Science (1054-3139) (Oxford Univ Press), 2012-07 , Vol. 69 , N. 6 , P. 925-938
Direitos:  2012 International Council for the Exploration of the Sea. Published by Oxford University Press. All rights reserved.


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