Either taking it easy or feeling too tired: Old Cory’s Shearwaters display reduced activity levels while at sea

Detalhes bibliográficos
Autor(a) principal: Catry, Paulo
Data de Publicação: 2011
Outros Autores: Granadeiro, José Pedro, Ramos, Jaime, Phillips, Richard A., Oliveira, 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/10400.12/2370
Resumo: It has long been known that birds change their behaviour, reproductive performance and survival as they mature, including in the first few years after recruitment into the breeding population. However, and contrasting with the description of patterns of actuarial and reproductive senescence in later years, there are surprisingly few studies documenting changes in behaviour in old individuals. Such studies are important, as birds provide particularly interesting models for studying the biology of senescence. It has been suggested that, unlike mammals, birds may remain physically fit until an advanced age, yet this has limited empirical support. In this paper, we used activity (immersion) loggers to show that old (>26 years) Cory’s Shearwaters Calonectris diomedea are less active when foraging at sea, spend more time resting on the water and have a smaller number of take-offs and landings during darkness, when compared to experienced mid-aged individuals (13–20 years old). Old individuals also tended to have reduced immune response against an experimental challenge using phytohaemagglutinin. These results are in line with observed reductions in activity levels with age in a wide range of non-avian taxa, and may suggest that old seabirds are physically less fit than younger individuals. Alternatively, old birds might simply be more experienced and their reduction in activity might reflect a strategic regulation of investment in different activities. Our study illustrates the potential for gaining insights into avian aging patterns and processes by looking into the behaviour of model organisms. We therefore encourage more research focusing on behavioural parameters that may reflect variations in physical condition or strategic choices, during both the breeding and non-breeding seasons.
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spelling Either taking it easy or feeling too tired: Old Cory’s Shearwaters display reduced activity levels while at seaCalonectris diomedeaSenescenceAgeLong-lived birdSelvagemIt has long been known that birds change their behaviour, reproductive performance and survival as they mature, including in the first few years after recruitment into the breeding population. However, and contrasting with the description of patterns of actuarial and reproductive senescence in later years, there are surprisingly few studies documenting changes in behaviour in old individuals. Such studies are important, as birds provide particularly interesting models for studying the biology of senescence. It has been suggested that, unlike mammals, birds may remain physically fit until an advanced age, yet this has limited empirical support. In this paper, we used activity (immersion) loggers to show that old (>26 years) Cory’s Shearwaters Calonectris diomedea are less active when foraging at sea, spend more time resting on the water and have a smaller number of take-offs and landings during darkness, when compared to experienced mid-aged individuals (13–20 years old). Old individuals also tended to have reduced immune response against an experimental challenge using phytohaemagglutinin. These results are in line with observed reductions in activity levels with age in a wide range of non-avian taxa, and may suggest that old seabirds are physically less fit than younger individuals. Alternatively, old birds might simply be more experienced and their reduction in activity might reflect a strategic regulation of investment in different activities. Our study illustrates the potential for gaining insights into avian aging patterns and processes by looking into the behaviour of model organisms. We therefore encourage more research focusing on behavioural parameters that may reflect variations in physical condition or strategic choices, during both the breeding and non-breeding seasons.SpringerRepositório do ISPACatry, PauloGranadeiro, José PedroRamos, JaimePhillips, Richard A.Oliveira, Paulo2013-09-21T10:25:13Z2011-01-01T00:00:00Z2011-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.12/2370engJournal of Ornithology, 152, 549-5550021-8375info: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:10400.12/2370Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:20:21.532186Repositório 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 Either taking it easy or feeling too tired: Old Cory’s Shearwaters display reduced activity levels while at sea
title Either taking it easy or feeling too tired: Old Cory’s Shearwaters display reduced activity levels while at sea
spellingShingle Either taking it easy or feeling too tired: Old Cory’s Shearwaters display reduced activity levels while at sea
Catry, Paulo
Calonectris diomedea
Senescence
Age
Long-lived bird
Selvagem
title_short Either taking it easy or feeling too tired: Old Cory’s Shearwaters display reduced activity levels while at sea
title_full Either taking it easy or feeling too tired: Old Cory’s Shearwaters display reduced activity levels while at sea
title_fullStr Either taking it easy or feeling too tired: Old Cory’s Shearwaters display reduced activity levels while at sea
title_full_unstemmed Either taking it easy or feeling too tired: Old Cory’s Shearwaters display reduced activity levels while at sea
title_sort Either taking it easy or feeling too tired: Old Cory’s Shearwaters display reduced activity levels while at sea
author Catry, Paulo
author_facet Catry, Paulo
Granadeiro, José Pedro
Ramos, Jaime
Phillips, Richard A.
Oliveira, Paulo
author_role author
author2 Granadeiro, José Pedro
Ramos, Jaime
Phillips, Richard A.
Oliveira, Paulo
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Repositório do ISPA
dc.contributor.author.fl_str_mv Catry, Paulo
Granadeiro, José Pedro
Ramos, Jaime
Phillips, Richard A.
Oliveira, Paulo
dc.subject.por.fl_str_mv Calonectris diomedea
Senescence
Age
Long-lived bird
Selvagem
topic Calonectris diomedea
Senescence
Age
Long-lived bird
Selvagem
description It has long been known that birds change their behaviour, reproductive performance and survival as they mature, including in the first few years after recruitment into the breeding population. However, and contrasting with the description of patterns of actuarial and reproductive senescence in later years, there are surprisingly few studies documenting changes in behaviour in old individuals. Such studies are important, as birds provide particularly interesting models for studying the biology of senescence. It has been suggested that, unlike mammals, birds may remain physically fit until an advanced age, yet this has limited empirical support. In this paper, we used activity (immersion) loggers to show that old (>26 years) Cory’s Shearwaters Calonectris diomedea are less active when foraging at sea, spend more time resting on the water and have a smaller number of take-offs and landings during darkness, when compared to experienced mid-aged individuals (13–20 years old). Old individuals also tended to have reduced immune response against an experimental challenge using phytohaemagglutinin. These results are in line with observed reductions in activity levels with age in a wide range of non-avian taxa, and may suggest that old seabirds are physically less fit than younger individuals. Alternatively, old birds might simply be more experienced and their reduction in activity might reflect a strategic regulation of investment in different activities. Our study illustrates the potential for gaining insights into avian aging patterns and processes by looking into the behaviour of model organisms. We therefore encourage more research focusing on behavioural parameters that may reflect variations in physical condition or strategic choices, during both the breeding and non-breeding seasons.
publishDate 2011
dc.date.none.fl_str_mv 2011-01-01T00:00:00Z
2011-01-01T00:00:00Z
2013-09-21T10:25:13Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.12/2370
url http://hdl.handle.net/10400.12/2370
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Journal of Ornithology, 152, 549-555
0021-8375
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dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
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collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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