Population-specific wintering distributions of adult south polar skuas over three oceans
International audience Migratory routes and the areas used during winter have probably been selected tomaximize fitness by providing favorable environmental conditions outside the breeding season. Inpolar environments, because of the extreme winter weather, most breeding species migrate toencounter...
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Online Access: | https://hal.science/hal-01288006 https://doi.org/10.3354/meps11465 |
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ftunivrochelle:oai:HAL:hal-01288006v1 2024-02-11T09:58:24+01:00 Population-specific wintering distributions of adult south polar skuas over three oceans Weimerskirch, Henri Tarroux, A Chastel, Olivier Delord, Karine Cherel, Yves Descamps, Sébastien Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Norvegian Polar Research Institute (NPRI) Norwegian Polar Institute 2015 https://hal.science/hal-01288006 https://doi.org/10.3354/meps11465 en eng HAL CCSD Inter Research info:eu-repo/semantics/altIdentifier/doi/10.3354/meps11465 hal-01288006 https://hal.science/hal-01288006 doi:10.3354/meps11465 ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-01288006 Marine Ecology Progress Series, 2015, 538, pp.229-237. ⟨10.3354/meps11465⟩ Catharacta maccormicki Geolocators Migration Population-specific strategies Stable isotopes [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2015 ftunivrochelle https://doi.org/10.3354/meps11465 2024-01-23T23:35:46Z International audience Migratory routes and the areas used during winter have probably been selected tomaximize fitness by providing favorable environmental conditions outside the breeding season. Inpolar environments, because of the extreme winter weather, most breeding species migrate toencounter better conditions in areas that can differ between and also within species. Using geo -location sensors, we found that south polar skuas Catharacta maccormicki from 2 distant populationsbreeding on the Antarctic continent along the Atlantic and Indian Oceans migrate northwardto winter in tropical Indian Ocean and in temperate North Pacific waters, respectively. Mostindividuals from each population winter in different environmental conditions, with water temperaturesranging from 16 to 29°C. Nevertheless, they have very similar activity patterns, spendingmore than 80% of their time on the water, and their feather δ15N values suggest that they probablyfeed at similar trophic levels during the molt. During overwintering, the overall and constant lowactivity level may be partly imposed by molting constraints, but it also suggests that trophic conditionsare good for skuas. The wintering areas of the species correspond to sectors of high concentrationsof breeding or wintering tropical, Northern, and Southern Hemisphere seabird speciesthat are likely to be kleptoparasitized by skuas. A certain degree of individual variation existswithin each population, which induces a spatial overlap in the wintering grounds of distant breedingpopulations. These results have potential important consequences in terms of fitness, geneticdivergence, and susceptibility to climate change and marine pollution. Article in Journal/Newspaper Antarc* Antarctic Catharacta maccormicki South Polar Skuas HAL - Université de La Rochelle Antarctic The Antarctic Pacific Indian Marine Ecology Progress Series 538 229 237 |
institution |
Open Polar |
collection |
HAL - Université de La Rochelle |
op_collection_id |
ftunivrochelle |
language |
English |
topic |
Catharacta maccormicki Geolocators Migration Population-specific strategies Stable isotopes [SDE]Environmental Sciences |
spellingShingle |
Catharacta maccormicki Geolocators Migration Population-specific strategies Stable isotopes [SDE]Environmental Sciences Weimerskirch, Henri Tarroux, A Chastel, Olivier Delord, Karine Cherel, Yves Descamps, Sébastien Population-specific wintering distributions of adult south polar skuas over three oceans |
topic_facet |
Catharacta maccormicki Geolocators Migration Population-specific strategies Stable isotopes [SDE]Environmental Sciences |
description |
International audience Migratory routes and the areas used during winter have probably been selected tomaximize fitness by providing favorable environmental conditions outside the breeding season. Inpolar environments, because of the extreme winter weather, most breeding species migrate toencounter better conditions in areas that can differ between and also within species. Using geo -location sensors, we found that south polar skuas Catharacta maccormicki from 2 distant populationsbreeding on the Antarctic continent along the Atlantic and Indian Oceans migrate northwardto winter in tropical Indian Ocean and in temperate North Pacific waters, respectively. Mostindividuals from each population winter in different environmental conditions, with water temperaturesranging from 16 to 29°C. Nevertheless, they have very similar activity patterns, spendingmore than 80% of their time on the water, and their feather δ15N values suggest that they probablyfeed at similar trophic levels during the molt. During overwintering, the overall and constant lowactivity level may be partly imposed by molting constraints, but it also suggests that trophic conditionsare good for skuas. The wintering areas of the species correspond to sectors of high concentrationsof breeding or wintering tropical, Northern, and Southern Hemisphere seabird speciesthat are likely to be kleptoparasitized by skuas. A certain degree of individual variation existswithin each population, which induces a spatial overlap in the wintering grounds of distant breedingpopulations. These results have potential important consequences in terms of fitness, geneticdivergence, and susceptibility to climate change and marine pollution. |
author2 |
Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Norvegian Polar Research Institute (NPRI) Norwegian Polar Institute |
format |
Article in Journal/Newspaper |
author |
Weimerskirch, Henri Tarroux, A Chastel, Olivier Delord, Karine Cherel, Yves Descamps, Sébastien |
author_facet |
Weimerskirch, Henri Tarroux, A Chastel, Olivier Delord, Karine Cherel, Yves Descamps, Sébastien |
author_sort |
Weimerskirch, Henri |
title |
Population-specific wintering distributions of adult south polar skuas over three oceans |
title_short |
Population-specific wintering distributions of adult south polar skuas over three oceans |
title_full |
Population-specific wintering distributions of adult south polar skuas over three oceans |
title_fullStr |
Population-specific wintering distributions of adult south polar skuas over three oceans |
title_full_unstemmed |
Population-specific wintering distributions of adult south polar skuas over three oceans |
title_sort |
population-specific wintering distributions of adult south polar skuas over three oceans |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-01288006 https://doi.org/10.3354/meps11465 |
geographic |
Antarctic The Antarctic Pacific Indian |
geographic_facet |
Antarctic The Antarctic Pacific Indian |
genre |
Antarc* Antarctic Catharacta maccormicki South Polar Skuas |
genre_facet |
Antarc* Antarctic Catharacta maccormicki South Polar Skuas |
op_source |
ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-01288006 Marine Ecology Progress Series, 2015, 538, pp.229-237. ⟨10.3354/meps11465⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3354/meps11465 hal-01288006 https://hal.science/hal-01288006 doi:10.3354/meps11465 |
op_doi |
https://doi.org/10.3354/meps11465 |
container_title |
Marine Ecology Progress Series |
container_volume |
538 |
container_start_page |
229 |
op_container_end_page |
237 |
_version_ |
1790594048584581120 |