Albatrosses following fishing vessels: How badly hooked are they on an easy meal?

Detalhes bibliográficos
Autor(a) principal: Granadeiro, José Pedro
Data de Publicação: 2011
Outros Autores: Phillips, Richard A., Brickle, Paul, Catry, Paulo
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.12/1361
Resumo: Fisheries have major impacts on seabirds, both by changing food availability and by causing direct mortality of birds during trawling and longline setting. However, little is known about the nature and the spatial-temporal extent of the interactions between individual birds and vessels. By studying a system in which we had fine-scale data on bird movements and activity, and near real-time information on vessel distribution, we provide new insights on the association of a threatened albatross with fisheries. During early chick-rearing, black-browed albatrosses Thalassarche melanophris from two different colonies (separated by only 75 km) showed significant differences in the degree of association with fisheries, despite being nearly equidistant to the Falklands fishing fleet. Most foraging trips from either colony did not bring tracked individuals close to vessels, and proportionally little time and foraging effort was spent near ships. Nevertheless, a few individuals repeatedly visited fishing vessels, which may indicate they specialise on fisheries-linked food sources and so are potentially more vulnerable to bycatch. The evidence suggests that this population has little reliance on fisheries discards at a critical stage of its nesting cycle, and hence measures to limit fisheries waste on the Patagonian shelf that also reduce vessel attractiveness and the risk of incidental mortality, would be of high overall conservation benefit.
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spelling Albatrosses following fishing vessels: How badly hooked are they on an easy meal?Fisheries have major impacts on seabirds, both by changing food availability and by causing direct mortality of birds during trawling and longline setting. However, little is known about the nature and the spatial-temporal extent of the interactions between individual birds and vessels. By studying a system in which we had fine-scale data on bird movements and activity, and near real-time information on vessel distribution, we provide new insights on the association of a threatened albatross with fisheries. During early chick-rearing, black-browed albatrosses Thalassarche melanophris from two different colonies (separated by only 75 km) showed significant differences in the degree of association with fisheries, despite being nearly equidistant to the Falklands fishing fleet. Most foraging trips from either colony did not bring tracked individuals close to vessels, and proportionally little time and foraging effort was spent near ships. Nevertheless, a few individuals repeatedly visited fishing vessels, which may indicate they specialise on fisheries-linked food sources and so are potentially more vulnerable to bycatch. The evidence suggests that this population has little reliance on fisheries discards at a critical stage of its nesting cycle, and hence measures to limit fisheries waste on the Patagonian shelf that also reduce vessel attractiveness and the risk of incidental mortality, would be of high overall conservation benefit.Public Library of ScienceRepositório do ISPAGranadeiro, José PedroPhillips, Richard A.Brickle, PaulCatry, Paulo2012-05-09T19:22:23Z2011-01-01T00:00:00Z2011-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.12/1361engPLoS One, 6 (3), e174671932-6203info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-09-05T16:37:26Zoai:repositorio.ispa.pt:10400.12/1361Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:19:28.520914Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Albatrosses following fishing vessels: How badly hooked are they on an easy meal?
title Albatrosses following fishing vessels: How badly hooked are they on an easy meal?
spellingShingle Albatrosses following fishing vessels: How badly hooked are they on an easy meal?
Granadeiro, José Pedro
title_short Albatrosses following fishing vessels: How badly hooked are they on an easy meal?
title_full Albatrosses following fishing vessels: How badly hooked are they on an easy meal?
title_fullStr Albatrosses following fishing vessels: How badly hooked are they on an easy meal?
title_full_unstemmed Albatrosses following fishing vessels: How badly hooked are they on an easy meal?
title_sort Albatrosses following fishing vessels: How badly hooked are they on an easy meal?
author Granadeiro, José Pedro
author_facet Granadeiro, José Pedro
Phillips, Richard A.
Brickle, Paul
Catry, Paulo
author_role author
author2 Phillips, Richard A.
Brickle, Paul
Catry, Paulo
author2_role author
author
author
dc.contributor.none.fl_str_mv Repositório do ISPA
dc.contributor.author.fl_str_mv Granadeiro, José Pedro
Phillips, Richard A.
Brickle, Paul
Catry, Paulo
description Fisheries have major impacts on seabirds, both by changing food availability and by causing direct mortality of birds during trawling and longline setting. However, little is known about the nature and the spatial-temporal extent of the interactions between individual birds and vessels. By studying a system in which we had fine-scale data on bird movements and activity, and near real-time information on vessel distribution, we provide new insights on the association of a threatened albatross with fisheries. During early chick-rearing, black-browed albatrosses Thalassarche melanophris from two different colonies (separated by only 75 km) showed significant differences in the degree of association with fisheries, despite being nearly equidistant to the Falklands fishing fleet. Most foraging trips from either colony did not bring tracked individuals close to vessels, and proportionally little time and foraging effort was spent near ships. Nevertheless, a few individuals repeatedly visited fishing vessels, which may indicate they specialise on fisheries-linked food sources and so are potentially more vulnerable to bycatch. The evidence suggests that this population has little reliance on fisheries discards at a critical stage of its nesting cycle, and hence measures to limit fisheries waste on the Patagonian shelf that also reduce vessel attractiveness and the risk of incidental mortality, would be of high overall conservation benefit.
publishDate 2011
dc.date.none.fl_str_mv 2011-01-01T00:00:00Z
2011-01-01T00:00:00Z
2012-05-09T19:22:23Z
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.12/1361
url http://hdl.handle.net/10400.12/1361
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language eng
dc.relation.none.fl_str_mv PLoS One, 6 (3), e17467
1932-6203
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publisher.none.fl_str_mv Public Library of Science
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