Stable isotopes document the winter foraging ecology of king penguins and highlight connectivity between subantarctic and Antarctic ecosystems
International audience The poorly known winter foraging ecology of the king penguin, a major Southern Ocean consumer, was investigated at the subantarctic Crozet Islands where the largest global population breeds. Blood δ13C and δ15N values were used as proxies of the birds’ foraging habitat and die...
Published in: | Ecology and Evolution |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2018
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Online Access: | https://hal.archives-ouvertes.fr/hal-02024974 https://hal.archives-ouvertes.fr/hal-02024974/document https://hal.archives-ouvertes.fr/hal-02024974/file/Cherel%20et%20al%202018%20Ecol%20and%20Evol.pdf https://doi.org/10.1002/ece3.3883 |
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ftccsdartic:oai:HAL:hal-02024974v1 2023-05-15T13:56:41+02:00 Stable isotopes document the winter foraging ecology of king penguins and highlight connectivity between subantarctic and Antarctic ecosystems Cherel, Yves Parenteau, Charline Bustamante, Paco Bost, Charles-André Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) LIttoral ENvironnement et Sociétés - UMRi 7266 (LIENSs) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS) 2018 https://hal.archives-ouvertes.fr/hal-02024974 https://hal.archives-ouvertes.fr/hal-02024974/document https://hal.archives-ouvertes.fr/hal-02024974/file/Cherel%20et%20al%202018%20Ecol%20and%20Evol.pdf https://doi.org/10.1002/ece3.3883 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1002/ece3.3883 hal-02024974 https://hal.archives-ouvertes.fr/hal-02024974 https://hal.archives-ouvertes.fr/hal-02024974/document https://hal.archives-ouvertes.fr/hal-02024974/file/Cherel%20et%20al%202018%20Ecol%20and%20Evol.pdf doi:10.1002/ece3.3883 info:eu-repo/semantics/OpenAccess Ecology and Evolution https://hal.archives-ouvertes.fr/hal-02024974 Ecology and Evolution, 2018, 8 (5), pp.2752-2765. ⟨10.1002/ece3.3883⟩ diet Southern Ocean myctophid prolactin seabird [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2018 ftccsdartic https://doi.org/10.1002/ece3.3883 2020-12-24T12:55:40Z International audience The poorly known winter foraging ecology of the king penguin, a major Southern Ocean consumer, was investigated at the subantarctic Crozet Islands where the largest global population breeds. Blood δ13C and δ15N values were used as proxies of the birds’ foraging habitat and diet, respectively, and circulating prolactin levels helped in determining the birds’ reproductive status. Plasma prolactin concentrations showed that king penguin adults of unknown breeding status (n = 52) that were present at the colony in winter were in fact breeders and failed breeders, but were not non -breeders. Circulating prolactin was neither related to δ13C nor δ15N values, thus suggesting that both breeders and failed breeders used the same foraging habitats and fed on the same prey. Plasma and blood cell isotopic values depicted four new relevant biological features on the feeding strategies of king penguins during the critical winter period: (1) 42% of the birds foraged in the distant Antarctic Zone, but 58% fed primarily in subantarctic waters (δ13C), (2) they preyed upon myctophids in both zones (δ15N), (3) individuals were consistent in their foraging strategies over the winter months (δ13C and δ15N), and (4) a higher proportion of females (77%–80%) than males (27%–31%) favored feeding in distant Antarctic waters (δ13C). This study highlights trophic connectivity between subantarctic and Antarctic ecosystems and hence the key role of energy export from Antarctic waters to sustain breeding populations of subantarctic predators, including during the Austral winter. Article in Journal/Newspaper Antarc* Antarctic Crozet Islands King Penguins Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Austral Southern Ocean Ecology and Evolution 8 5 2752 2765 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
diet Southern Ocean myctophid prolactin seabird [SDE]Environmental Sciences |
spellingShingle |
diet Southern Ocean myctophid prolactin seabird [SDE]Environmental Sciences Cherel, Yves Parenteau, Charline Bustamante, Paco Bost, Charles-André Stable isotopes document the winter foraging ecology of king penguins and highlight connectivity between subantarctic and Antarctic ecosystems |
topic_facet |
diet Southern Ocean myctophid prolactin seabird [SDE]Environmental Sciences |
description |
International audience The poorly known winter foraging ecology of the king penguin, a major Southern Ocean consumer, was investigated at the subantarctic Crozet Islands where the largest global population breeds. Blood δ13C and δ15N values were used as proxies of the birds’ foraging habitat and diet, respectively, and circulating prolactin levels helped in determining the birds’ reproductive status. Plasma prolactin concentrations showed that king penguin adults of unknown breeding status (n = 52) that were present at the colony in winter were in fact breeders and failed breeders, but were not non -breeders. Circulating prolactin was neither related to δ13C nor δ15N values, thus suggesting that both breeders and failed breeders used the same foraging habitats and fed on the same prey. Plasma and blood cell isotopic values depicted four new relevant biological features on the feeding strategies of king penguins during the critical winter period: (1) 42% of the birds foraged in the distant Antarctic Zone, but 58% fed primarily in subantarctic waters (δ13C), (2) they preyed upon myctophids in both zones (δ15N), (3) individuals were consistent in their foraging strategies over the winter months (δ13C and δ15N), and (4) a higher proportion of females (77%–80%) than males (27%–31%) favored feeding in distant Antarctic waters (δ13C). This study highlights trophic connectivity between subantarctic and Antarctic ecosystems and hence the key role of energy export from Antarctic waters to sustain breeding populations of subantarctic predators, including during the Austral winter. |
author2 |
Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) LIttoral ENvironnement et Sociétés - UMRi 7266 (LIENSs) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Cherel, Yves Parenteau, Charline Bustamante, Paco Bost, Charles-André |
author_facet |
Cherel, Yves Parenteau, Charline Bustamante, Paco Bost, Charles-André |
author_sort |
Cherel, Yves |
title |
Stable isotopes document the winter foraging ecology of king penguins and highlight connectivity between subantarctic and Antarctic ecosystems |
title_short |
Stable isotopes document the winter foraging ecology of king penguins and highlight connectivity between subantarctic and Antarctic ecosystems |
title_full |
Stable isotopes document the winter foraging ecology of king penguins and highlight connectivity between subantarctic and Antarctic ecosystems |
title_fullStr |
Stable isotopes document the winter foraging ecology of king penguins and highlight connectivity between subantarctic and Antarctic ecosystems |
title_full_unstemmed |
Stable isotopes document the winter foraging ecology of king penguins and highlight connectivity between subantarctic and Antarctic ecosystems |
title_sort |
stable isotopes document the winter foraging ecology of king penguins and highlight connectivity between subantarctic and antarctic ecosystems |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.archives-ouvertes.fr/hal-02024974 https://hal.archives-ouvertes.fr/hal-02024974/document https://hal.archives-ouvertes.fr/hal-02024974/file/Cherel%20et%20al%202018%20Ecol%20and%20Evol.pdf https://doi.org/10.1002/ece3.3883 |
geographic |
Antarctic Austral Southern Ocean |
geographic_facet |
Antarctic Austral Southern Ocean |
genre |
Antarc* Antarctic Crozet Islands King Penguins Southern Ocean |
genre_facet |
Antarc* Antarctic Crozet Islands King Penguins Southern Ocean |
op_source |
Ecology and Evolution https://hal.archives-ouvertes.fr/hal-02024974 Ecology and Evolution, 2018, 8 (5), pp.2752-2765. ⟨10.1002/ece3.3883⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/ece3.3883 hal-02024974 https://hal.archives-ouvertes.fr/hal-02024974 https://hal.archives-ouvertes.fr/hal-02024974/document https://hal.archives-ouvertes.fr/hal-02024974/file/Cherel%20et%20al%202018%20Ecol%20and%20Evol.pdf doi:10.1002/ece3.3883 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/ece3.3883 |
container_title |
Ecology and Evolution |
container_volume |
8 |
container_issue |
5 |
container_start_page |
2752 |
op_container_end_page |
2765 |
_version_ |
1766264263083556864 |