Sexual and individual foraging segregation in Gentoo penguins Pygoscelis papua from the Southern Ocean during an abnormal winter
International audience Knowledge about sexual segregation and gender-specific, or indeed individual specialization,in marine organisms has improved considerably in the past decade. In this context, wetested the ªIntersexual Competition Hypothesisº for penguins by investigating the feedingecology of...
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Online Access: | https://hal.archives-ouvertes.fr/hal-01501413 https://doi.org/10.1371/journal.pone.0174850 |
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ftccsdartic:oai:HAL:hal-01501413v1 2023-05-15T13:51:41+02:00 Sexual and individual foraging segregation in Gentoo penguins Pygoscelis papua from the Southern Ocean during an abnormal winter Xavier, José C. Trathan, Philip N. Ceia, Filipe R. Tarling, Geraint A. Adlard, Stacey Fox, Derren Edwards, Ewan W. J. Vieira, Rui P. Medeiros, Renata De Broyer, Claude Cherel, Yves British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Marine and environmental research centre - IMAR-CMA (Coimbra, Portugal) University of Coimbra Portugal (UC) School of Biosciences Cardiff Cardiff University Department of Invertebrates Royal Belgian Institute of Natural Sciences (RBINS) 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) 2017-03-31 https://hal.archives-ouvertes.fr/hal-01501413 https://doi.org/10.1371/journal.pone.0174850 en eng HAL CCSD Public Library of Science info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0174850 hal-01501413 https://hal.archives-ouvertes.fr/hal-01501413 doi:10.1371/journal.pone.0174850 ISSN: 1932-6203 EISSN: 1932-6203 PLoS ONE https://hal.archives-ouvertes.fr/hal-01501413 PLoS ONE, Public Library of Science, 2017, 12 (3), pp.e0174850. ⟨10.1371/journal.pone.0174850⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2017 ftccsdartic https://doi.org/10.1371/journal.pone.0174850 2021-11-07T03:56:12Z International audience Knowledge about sexual segregation and gender-specific, or indeed individual specialization,in marine organisms has improved considerably in the past decade. In this context, wetested the ªIntersexual Competition Hypothesisº for penguins by investigating the feedingecology of Gentoo penguins during their austral winter non-breeding season. We consideredthis during unusual environmental conditions (i.e. the year 2009 had observations ofhigh sea surface and air temperatures) in comparison with the long term average at BirdIsland, South Georgia. Through conventional (i.e. stomach contents) and stable isotopicvalues from red blood cells, plasma and feathers of both male and female Gentoo penguins,we showed that there were significant differences between sexes, with males feeding mainlyon fish (54% by mass) followed by crustaceans (38%) whereas females fed mainly on crustaceans(89% by mass) followed by fish (4%). Themisto gaudichaudii was the most importantcrustacean prey for males (64% by mass; 82% by number; 53% by frequency of occurrence)and females (63% by mass; 77% by number; 89% by frequency of occurrence), contrastingwith all previous studies that found Antarctic krill Euphausia superba were generally the mainprey. Stable isotopic data showed that, in terms of habitat use (based on δ 13C), there weresignificant differences in short-term carbon signatures between males and females (basedon plasma and red blood cells), suggesting that both sexes explored different habitats, withfemales exploring more offshore pelagic waters and males feeding more in coastal benthicwaters. Based on δ 15N, males fed on significantly higher trophic level than females (basedon plasma and red blood cells), in agreement with our diet results., Thus, Gentoo penguinsbehave in a similar manner to other non-breeding penguins species (e.g. king, macaroniand rockhopper penguins), albeit at a smaller spatial scale (as they do not disperse as theseother penguins do), in that they have a wider habitat and trophic niche ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Euphausia superba Pygoscelis papua Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Austral Southern Ocean PLOS ONE 12 3 e0174850 |
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 |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Xavier, José C. Trathan, Philip N. Ceia, Filipe R. Tarling, Geraint A. Adlard, Stacey Fox, Derren Edwards, Ewan W. J. Vieira, Rui P. Medeiros, Renata De Broyer, Claude Cherel, Yves Sexual and individual foraging segregation in Gentoo penguins Pygoscelis papua from the Southern Ocean during an abnormal winter |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience Knowledge about sexual segregation and gender-specific, or indeed individual specialization,in marine organisms has improved considerably in the past decade. In this context, wetested the ªIntersexual Competition Hypothesisº for penguins by investigating the feedingecology of Gentoo penguins during their austral winter non-breeding season. We consideredthis during unusual environmental conditions (i.e. the year 2009 had observations ofhigh sea surface and air temperatures) in comparison with the long term average at BirdIsland, South Georgia. Through conventional (i.e. stomach contents) and stable isotopicvalues from red blood cells, plasma and feathers of both male and female Gentoo penguins,we showed that there were significant differences between sexes, with males feeding mainlyon fish (54% by mass) followed by crustaceans (38%) whereas females fed mainly on crustaceans(89% by mass) followed by fish (4%). Themisto gaudichaudii was the most importantcrustacean prey for males (64% by mass; 82% by number; 53% by frequency of occurrence)and females (63% by mass; 77% by number; 89% by frequency of occurrence), contrastingwith all previous studies that found Antarctic krill Euphausia superba were generally the mainprey. Stable isotopic data showed that, in terms of habitat use (based on δ 13C), there weresignificant differences in short-term carbon signatures between males and females (basedon plasma and red blood cells), suggesting that both sexes explored different habitats, withfemales exploring more offshore pelagic waters and males feeding more in coastal benthicwaters. Based on δ 15N, males fed on significantly higher trophic level than females (basedon plasma and red blood cells), in agreement with our diet results., Thus, Gentoo penguinsbehave in a similar manner to other non-breeding penguins species (e.g. king, macaroniand rockhopper penguins), albeit at a smaller spatial scale (as they do not disperse as theseother penguins do), in that they have a wider habitat and trophic niche ... |
author2 |
British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Marine and environmental research centre - IMAR-CMA (Coimbra, Portugal) University of Coimbra Portugal (UC) School of Biosciences Cardiff Cardiff University Department of Invertebrates Royal Belgian Institute of Natural Sciences (RBINS) 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) |
format |
Article in Journal/Newspaper |
author |
Xavier, José C. Trathan, Philip N. Ceia, Filipe R. Tarling, Geraint A. Adlard, Stacey Fox, Derren Edwards, Ewan W. J. Vieira, Rui P. Medeiros, Renata De Broyer, Claude Cherel, Yves |
author_facet |
Xavier, José C. Trathan, Philip N. Ceia, Filipe R. Tarling, Geraint A. Adlard, Stacey Fox, Derren Edwards, Ewan W. J. Vieira, Rui P. Medeiros, Renata De Broyer, Claude Cherel, Yves |
author_sort |
Xavier, José C. |
title |
Sexual and individual foraging segregation in Gentoo penguins Pygoscelis papua from the Southern Ocean during an abnormal winter |
title_short |
Sexual and individual foraging segregation in Gentoo penguins Pygoscelis papua from the Southern Ocean during an abnormal winter |
title_full |
Sexual and individual foraging segregation in Gentoo penguins Pygoscelis papua from the Southern Ocean during an abnormal winter |
title_fullStr |
Sexual and individual foraging segregation in Gentoo penguins Pygoscelis papua from the Southern Ocean during an abnormal winter |
title_full_unstemmed |
Sexual and individual foraging segregation in Gentoo penguins Pygoscelis papua from the Southern Ocean during an abnormal winter |
title_sort |
sexual and individual foraging segregation in gentoo penguins pygoscelis papua from the southern ocean during an abnormal winter |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.archives-ouvertes.fr/hal-01501413 https://doi.org/10.1371/journal.pone.0174850 |
geographic |
Antarctic Austral Southern Ocean |
geographic_facet |
Antarctic Austral Southern Ocean |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba Pygoscelis papua Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba Pygoscelis papua Southern Ocean |
op_source |
ISSN: 1932-6203 EISSN: 1932-6203 PLoS ONE https://hal.archives-ouvertes.fr/hal-01501413 PLoS ONE, Public Library of Science, 2017, 12 (3), pp.e0174850. ⟨10.1371/journal.pone.0174850⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0174850 hal-01501413 https://hal.archives-ouvertes.fr/hal-01501413 doi:10.1371/journal.pone.0174850 |
op_doi |
https://doi.org/10.1371/journal.pone.0174850 |
container_title |
PLOS ONE |
container_volume |
12 |
container_issue |
3 |
container_start_page |
e0174850 |
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1766255702844637184 |