Inter-population segregation in the wintering areas of macaroni penguins
International audience How top avian predators are distributed at sea during the inter-breeding period remains poorly known. Here we focused on the pelagic seabird that is the single greatest avian consumer of marine resources: the macaroni penguin. Our aims were (1) to investigate where these pengu...
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ftinraparis:oai:HAL:hal-00558229v1 2024-09-09T19:49:55+00:00 Inter-population segregation in the wintering areas of macaroni penguins Thiebot, Jean-Baptiste Cherel, Yves Trathan, Phil Bost, Charles-André Centre d'Études Biologiques de Chizé (CEBC) Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) 2011 https://hal.science/hal-00558229 https://doi.org/10.3354/meps08907 en eng HAL CCSD Inter Research info:eu-repo/semantics/altIdentifier/doi/10.3354/meps08907 hal-00558229 https://hal.science/hal-00558229 doi:10.3354/meps08907 ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-00558229 Marine Ecology Progress Series, 2011, 421, pp.279-290. ⟨10.3354/meps08907⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2011 ftinraparis https://doi.org/10.3354/meps08907 2024-06-18T14:34:53Z International audience How top avian predators are distributed at sea during the inter-breeding period remains poorly known. Here we focused on the pelagic seabird that is the single greatest avian consumer of marine resources: the macaroni penguin. Our aims were (1) to investigate where these penguins are distributed whilst at sea during winter, and (2) to determine how their distribution and trophic ecology varies in 1 colony between successive years and between 2 colonies from neighbouring localities at the same time. We surveyed a total of 30 penguins from Crozet and Kerguelen Islands (southern Indian Ocean). Penguins from Kerguelen were tracked in 2006 and 2007, and those from Crozet in 2007. Habitat use was investigated using miniaturised light-based geolocators, and trophic ecology by the use of stable isotope analyses. Results showed large-scale patterns of distribution over deep oceanic waters of the Polar Frontal Zone characterised by a temperature of 3.0 to 3.5°C during July. Birds from Kerguelen had a consistent inter-annual winter distribution at the population level. Birds tracked from Crozet were distributed in distinct areas, separate from the birds from Kerguelen. Trophic ecology (blood δ15N value) was very similar between years and colonies, and indicated that these penguins preyed upon low trophic level prey, most probably swarming crustaceans, at the end of winter. We conclude that inter-annual fidelity in winter habitat provides evidence of highly favourable and predictable foraging areas, while the distinct inter-colony distributions suggest very heterogeneous distribution of profitable feeding areas for this species in the southern Indian Ocean. Article in Journal/Newspaper Kerguelen Islands Macaroni penguin Institut National de la Recherche Agronomique: ProdINRA Indian Kerguelen Kerguelen Islands Marine Ecology Progress Series 421 279 290 |
institution |
Open Polar |
collection |
Institut National de la Recherche Agronomique: ProdINRA |
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ftinraparis |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Thiebot, Jean-Baptiste Cherel, Yves Trathan, Phil Bost, Charles-André Inter-population segregation in the wintering areas of macaroni penguins |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience How top avian predators are distributed at sea during the inter-breeding period remains poorly known. Here we focused on the pelagic seabird that is the single greatest avian consumer of marine resources: the macaroni penguin. Our aims were (1) to investigate where these penguins are distributed whilst at sea during winter, and (2) to determine how their distribution and trophic ecology varies in 1 colony between successive years and between 2 colonies from neighbouring localities at the same time. We surveyed a total of 30 penguins from Crozet and Kerguelen Islands (southern Indian Ocean). Penguins from Kerguelen were tracked in 2006 and 2007, and those from Crozet in 2007. Habitat use was investigated using miniaturised light-based geolocators, and trophic ecology by the use of stable isotope analyses. Results showed large-scale patterns of distribution over deep oceanic waters of the Polar Frontal Zone characterised by a temperature of 3.0 to 3.5°C during July. Birds from Kerguelen had a consistent inter-annual winter distribution at the population level. Birds tracked from Crozet were distributed in distinct areas, separate from the birds from Kerguelen. Trophic ecology (blood δ15N value) was very similar between years and colonies, and indicated that these penguins preyed upon low trophic level prey, most probably swarming crustaceans, at the end of winter. We conclude that inter-annual fidelity in winter habitat provides evidence of highly favourable and predictable foraging areas, while the distinct inter-colony distributions suggest very heterogeneous distribution of profitable feeding areas for this species in the southern Indian Ocean. |
author2 |
Centre d'Études Biologiques de Chizé (CEBC) Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) |
format |
Article in Journal/Newspaper |
author |
Thiebot, Jean-Baptiste Cherel, Yves Trathan, Phil Bost, Charles-André |
author_facet |
Thiebot, Jean-Baptiste Cherel, Yves Trathan, Phil Bost, Charles-André |
author_sort |
Thiebot, Jean-Baptiste |
title |
Inter-population segregation in the wintering areas of macaroni penguins |
title_short |
Inter-population segregation in the wintering areas of macaroni penguins |
title_full |
Inter-population segregation in the wintering areas of macaroni penguins |
title_fullStr |
Inter-population segregation in the wintering areas of macaroni penguins |
title_full_unstemmed |
Inter-population segregation in the wintering areas of macaroni penguins |
title_sort |
inter-population segregation in the wintering areas of macaroni penguins |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://hal.science/hal-00558229 https://doi.org/10.3354/meps08907 |
geographic |
Indian Kerguelen Kerguelen Islands |
geographic_facet |
Indian Kerguelen Kerguelen Islands |
genre |
Kerguelen Islands Macaroni penguin |
genre_facet |
Kerguelen Islands Macaroni penguin |
op_source |
ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-00558229 Marine Ecology Progress Series, 2011, 421, pp.279-290. ⟨10.3354/meps08907⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3354/meps08907 hal-00558229 https://hal.science/hal-00558229 doi:10.3354/meps08907 |
op_doi |
https://doi.org/10.3354/meps08907 |
container_title |
Marine Ecology Progress Series |
container_volume |
421 |
container_start_page |
279 |
op_container_end_page |
290 |
_version_ |
1809919256126554112 |