Parent–offspring dietary segregation of Cory’s shearwaters breeding in contrasting environments

Detalhes bibliográficos
Autor(a) principal: Alonso, Hany Rafael de Drummond Ludovice Garcia
Data de Publicação: 2012
Outros Autores: Granadeiro, José Pedro, Paiva, Vitor H., Dias, Ana S., Ramos, Jaime, 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/10400.12/2374
Resumo: In pelagic seabirds, who often explore distant food resources, information is usually scarce on the level of trophic segregation between parents and their offspring. To investigate this issue, we used GPS tracking, stable isotopes and dietary information of Cory’s shearwaters Calonectris diomedea breeding in contrasting environments. Foraging trips at Selvagem Grande (an oceanic island) mainly targeted the distant African coast, while at Berlenga island (located on the continental shelf), shearwaters foraged mainly over nearby shelf waters. The degree of isotopic segregation between adults and chicks, based on d13C, differed markedly between the two sites, indicating that adult birds at Selvagem fed their chicks with a mixture of shelf and offshore pelagic prey but assimilated more prey captured on coastal shelf waters. Isotopic differences between age classes at Berlenga were much smaller and may have resulted from limited dietary segregation or from age-related metabolic differences. The diet of shearwaters was also very different between the two colonies, with offshore pelagic prey only being detected at Selvagem Grande. Our findings suggest that spatial foraging constraints influence resource partitioning between pelagic seabirds and their offspring and can lead to a parent–offspring dietary segregation.
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spelling Parent–offspring dietary segregation of Cory’s shearwaters breeding in contrasting environmentsIn pelagic seabirds, who often explore distant food resources, information is usually scarce on the level of trophic segregation between parents and their offspring. To investigate this issue, we used GPS tracking, stable isotopes and dietary information of Cory’s shearwaters Calonectris diomedea breeding in contrasting environments. Foraging trips at Selvagem Grande (an oceanic island) mainly targeted the distant African coast, while at Berlenga island (located on the continental shelf), shearwaters foraged mainly over nearby shelf waters. The degree of isotopic segregation between adults and chicks, based on d13C, differed markedly between the two sites, indicating that adult birds at Selvagem fed their chicks with a mixture of shelf and offshore pelagic prey but assimilated more prey captured on coastal shelf waters. Isotopic differences between age classes at Berlenga were much smaller and may have resulted from limited dietary segregation or from age-related metabolic differences. The diet of shearwaters was also very different between the two colonies, with offshore pelagic prey only being detected at Selvagem Grande. Our findings suggest that spatial foraging constraints influence resource partitioning between pelagic seabirds and their offspring and can lead to a parent–offspring dietary segregation.SpringerRepositório do ISPAAlonso, Hany Rafael de Drummond Ludovice GarciaGranadeiro, José PedroPaiva, Vitor H.Dias, Ana S.Ramos, JaimeCatry, Paulo2013-09-21T10:48:20Z2012-01-01T00:00:00Z2012-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.12/2374engMarine Biology, 159, 1197-12070025-3162info: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:10400.12/2374Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:20:21.748444Repositório 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 Parent–offspring dietary segregation of Cory’s shearwaters breeding in contrasting environments
title Parent–offspring dietary segregation of Cory’s shearwaters breeding in contrasting environments
spellingShingle Parent–offspring dietary segregation of Cory’s shearwaters breeding in contrasting environments
Alonso, Hany Rafael de Drummond Ludovice Garcia
title_short Parent–offspring dietary segregation of Cory’s shearwaters breeding in contrasting environments
title_full Parent–offspring dietary segregation of Cory’s shearwaters breeding in contrasting environments
title_fullStr Parent–offspring dietary segregation of Cory’s shearwaters breeding in contrasting environments
title_full_unstemmed Parent–offspring dietary segregation of Cory’s shearwaters breeding in contrasting environments
title_sort Parent–offspring dietary segregation of Cory’s shearwaters breeding in contrasting environments
author Alonso, Hany Rafael de Drummond Ludovice Garcia
author_facet Alonso, Hany Rafael de Drummond Ludovice Garcia
Granadeiro, José Pedro
Paiva, Vitor H.
Dias, Ana S.
Ramos, Jaime
Catry, Paulo
author_role author
author2 Granadeiro, José Pedro
Paiva, Vitor H.
Dias, Ana S.
Ramos, Jaime
Catry, Paulo
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Repositório do ISPA
dc.contributor.author.fl_str_mv Alonso, Hany Rafael de Drummond Ludovice Garcia
Granadeiro, José Pedro
Paiva, Vitor H.
Dias, Ana S.
Ramos, Jaime
Catry, Paulo
description In pelagic seabirds, who often explore distant food resources, information is usually scarce on the level of trophic segregation between parents and their offspring. To investigate this issue, we used GPS tracking, stable isotopes and dietary information of Cory’s shearwaters Calonectris diomedea breeding in contrasting environments. Foraging trips at Selvagem Grande (an oceanic island) mainly targeted the distant African coast, while at Berlenga island (located on the continental shelf), shearwaters foraged mainly over nearby shelf waters. The degree of isotopic segregation between adults and chicks, based on d13C, differed markedly between the two sites, indicating that adult birds at Selvagem fed their chicks with a mixture of shelf and offshore pelagic prey but assimilated more prey captured on coastal shelf waters. Isotopic differences between age classes at Berlenga were much smaller and may have resulted from limited dietary segregation or from age-related metabolic differences. The diet of shearwaters was also very different between the two colonies, with offshore pelagic prey only being detected at Selvagem Grande. Our findings suggest that spatial foraging constraints influence resource partitioning between pelagic seabirds and their offspring and can lead to a parent–offspring dietary segregation.
publishDate 2012
dc.date.none.fl_str_mv 2012-01-01T00:00:00Z
2012-01-01T00:00:00Z
2013-09-21T10:48:20Z
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.12/2374
url http://hdl.handle.net/10400.12/2374
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Marine Biology, 159, 1197-1207
0025-3162
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dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
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