Different means to the same end: Long-distance migrant seabirds from two colonies differ in behaviour, despite common wintering grounds

Detalhes bibliográficos
Autor(a) principal: Catry, Paulo
Data de Publicação: 2011
Outros Autores: Dias, Maria P., Phillips, Richard A., Granadeiro, José Pedro
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.12/2383
Resumo: Although seabirds that are trans-equatorial migrants show apparently broad overlap among populations in the nonbreeding season, such large-scale pattern may conceal subtle but nevertheless key differences in migratory behaviour. These specializations could reflect adaptation to different environments during the breeding season, carry-over effects from the breeding to the nonbreeding period, or asymmetries in competitive ability of birds of different origin. We compared the migratory and wintering behaviour of Cory’s shearwaters Calonectris diomedea nesting in Berlengas and in the Selvagens, two colonies in contrasting oceanographic environments, separated by ca. 1200 km. Although no differences were found in winter distribution, there was a marked divergence in timing, route and the use of staging areas during the postbreeding (autumn) migration. Birds from Berlengas typically travelled to oceanic waters in the North Atlantic for an extended stopover, whereas those from Selvagens rarely did so. In the South Atlantic, birds from Selvagens spent more time in flight, perhaps because they had higher energy and nutrient requirements for feather replacement compared to birds from Berlengas, which moult more flight feathers during breeding. Stable isotope analyses of feathers suggested that this variation in activity patterns was unrelated to trophic ecology. Differences in migration routes and stopovers may expose populations to distinct threats, and should be taken into consideration when defining units for conservation purposes and developing appropriate management strategies.
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spelling Different means to the same end: Long-distance migrant seabirds from two colonies differ in behaviour, despite common wintering groundsAlthough seabirds that are trans-equatorial migrants show apparently broad overlap among populations in the nonbreeding season, such large-scale pattern may conceal subtle but nevertheless key differences in migratory behaviour. These specializations could reflect adaptation to different environments during the breeding season, carry-over effects from the breeding to the nonbreeding period, or asymmetries in competitive ability of birds of different origin. We compared the migratory and wintering behaviour of Cory’s shearwaters Calonectris diomedea nesting in Berlengas and in the Selvagens, two colonies in contrasting oceanographic environments, separated by ca. 1200 km. Although no differences were found in winter distribution, there was a marked divergence in timing, route and the use of staging areas during the postbreeding (autumn) migration. Birds from Berlengas typically travelled to oceanic waters in the North Atlantic for an extended stopover, whereas those from Selvagens rarely did so. In the South Atlantic, birds from Selvagens spent more time in flight, perhaps because they had higher energy and nutrient requirements for feather replacement compared to birds from Berlengas, which moult more flight feathers during breeding. Stable isotope analyses of feathers suggested that this variation in activity patterns was unrelated to trophic ecology. Differences in migration routes and stopovers may expose populations to distinct threats, and should be taken into consideration when defining units for conservation purposes and developing appropriate management strategies.Public Library ScienceRepositório do ISPACatry, PauloDias, Maria P.Phillips, Richard A.Granadeiro, José Pedro2013-09-21T13:16:43Z2011-01-01T00:00:00Z2011-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.12/2383engPlos One, 6 (10), e260791932-6203info:eu-repo/semantics/embargoedAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-09-05T16:38:18Zoai:repositorio.ispa.pt:10400.12/2383Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:20:22.224754Repositório 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 Different means to the same end: Long-distance migrant seabirds from two colonies differ in behaviour, despite common wintering grounds
title Different means to the same end: Long-distance migrant seabirds from two colonies differ in behaviour, despite common wintering grounds
spellingShingle Different means to the same end: Long-distance migrant seabirds from two colonies differ in behaviour, despite common wintering grounds
Catry, Paulo
title_short Different means to the same end: Long-distance migrant seabirds from two colonies differ in behaviour, despite common wintering grounds
title_full Different means to the same end: Long-distance migrant seabirds from two colonies differ in behaviour, despite common wintering grounds
title_fullStr Different means to the same end: Long-distance migrant seabirds from two colonies differ in behaviour, despite common wintering grounds
title_full_unstemmed Different means to the same end: Long-distance migrant seabirds from two colonies differ in behaviour, despite common wintering grounds
title_sort Different means to the same end: Long-distance migrant seabirds from two colonies differ in behaviour, despite common wintering grounds
author Catry, Paulo
author_facet Catry, Paulo
Dias, Maria P.
Phillips, Richard A.
Granadeiro, José Pedro
author_role author
author2 Dias, Maria P.
Phillips, Richard A.
Granadeiro, José Pedro
author2_role author
author
author
dc.contributor.none.fl_str_mv Repositório do ISPA
dc.contributor.author.fl_str_mv Catry, Paulo
Dias, Maria P.
Phillips, Richard A.
Granadeiro, José Pedro
description Although seabirds that are trans-equatorial migrants show apparently broad overlap among populations in the nonbreeding season, such large-scale pattern may conceal subtle but nevertheless key differences in migratory behaviour. These specializations could reflect adaptation to different environments during the breeding season, carry-over effects from the breeding to the nonbreeding period, or asymmetries in competitive ability of birds of different origin. We compared the migratory and wintering behaviour of Cory’s shearwaters Calonectris diomedea nesting in Berlengas and in the Selvagens, two colonies in contrasting oceanographic environments, separated by ca. 1200 km. Although no differences were found in winter distribution, there was a marked divergence in timing, route and the use of staging areas during the postbreeding (autumn) migration. Birds from Berlengas typically travelled to oceanic waters in the North Atlantic for an extended stopover, whereas those from Selvagens rarely did so. In the South Atlantic, birds from Selvagens spent more time in flight, perhaps because they had higher energy and nutrient requirements for feather replacement compared to birds from Berlengas, which moult more flight feathers during breeding. Stable isotope analyses of feathers suggested that this variation in activity patterns was unrelated to trophic ecology. Differences in migration routes and stopovers may expose populations to distinct threats, and should be taken into consideration when defining units for conservation purposes and developing appropriate management strategies.
publishDate 2011
dc.date.none.fl_str_mv 2011-01-01T00:00:00Z
2011-01-01T00:00:00Z
2013-09-21T13:16:43Z
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url http://hdl.handle.net/10400.12/2383
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dc.relation.none.fl_str_mv Plos One, 6 (10), e26079
1932-6203
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dc.publisher.none.fl_str_mv Public Library Science
publisher.none.fl_str_mv Public Library Science
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