Decadal changes in blood delta C-13 values, at-sea distribution, and weaning mass of southern elephant seals from Kerguelen Islands
Changes in the foraging environment and at-sea distribution of southern elephant seals from Kerguelen Islands were investigated over a decade (2004-2018) using tracking, weaning mass, and blood delta C-13 values. Females showed either a sub-Antarctic or an Antarctic foraging strategy, and no signifi...
Published in: | Proceedings of the Royal Society B: Biological Sciences |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://archimer.ifremer.fr/doc/00659/77078/78422.pdf https://archimer.ifremer.fr/doc/00659/77078/78423.pdf https://archimer.ifremer.fr/doc/00659/77078/78424.pdf https://archimer.ifremer.fr/doc/00659/77078/78425.pdf https://archimer.ifremer.fr/doc/00659/77078/78426.pdf https://doi.org/10.1098/rspb.2020.1544 https://archimer.ifremer.fr/doc/00659/77078/ |
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ftarchimer:oai:archimer.ifremer.fr:77078 2023-05-15T13:47:36+02:00 Decadal changes in blood delta C-13 values, at-sea distribution, and weaning mass of southern elephant seals from Kerguelen Islands Mestre, Julie Authier, Matthieu Cherel, Yves Harcourt, Rob Mcmahon, Clive R. Hindell, Mark A. Charrassin, Jean-benoit Guinet, Christophe 2020-08 application/pdf https://archimer.ifremer.fr/doc/00659/77078/78422.pdf https://archimer.ifremer.fr/doc/00659/77078/78423.pdf https://archimer.ifremer.fr/doc/00659/77078/78424.pdf https://archimer.ifremer.fr/doc/00659/77078/78425.pdf https://archimer.ifremer.fr/doc/00659/77078/78426.pdf https://doi.org/10.1098/rspb.2020.1544 https://archimer.ifremer.fr/doc/00659/77078/ eng eng Royal Soc https://archimer.ifremer.fr/doc/00659/77078/78422.pdf https://archimer.ifremer.fr/doc/00659/77078/78423.pdf https://archimer.ifremer.fr/doc/00659/77078/78424.pdf https://archimer.ifremer.fr/doc/00659/77078/78425.pdf https://archimer.ifremer.fr/doc/00659/77078/78426.pdf doi:10.1098/rspb.2020.1544 https://archimer.ifremer.fr/doc/00659/77078/ info:eu-repo/semantics/openAccess restricted use Proceedings Of The Royal Society B-biological Sciences (0962-8452) (Royal Soc), 2020-08 , Vol. 287 , N. 1933 , P. 20201544 (10p.) foraging habitat stable isotopes bio-logging population strategies decadal change Indian sector of the Southern Ocean text Publication info:eu-repo/semantics/article 2020 ftarchimer https://doi.org/10.1098/rspb.2020.1544 2021-09-23T20:36:20Z Changes in the foraging environment and at-sea distribution of southern elephant seals from Kerguelen Islands were investigated over a decade (2004-2018) using tracking, weaning mass, and blood delta C-13 values. Females showed either a sub-Antarctic or an Antarctic foraging strategy, and no significant shift in their at-sea distribution was detected between 2004 and 2017. The proportion of females foraging in sub-Antarctic versus Antarctic habitats did not change over the 2006-2018 period. Pup weaning mass varied according to the foraging habitat of their mothers. The weaning mass of sub-Antarctic foraging mothers' pups decreased by 11.7 kg over the study period, but they were on average 5.8 kg heavier than pups from Antarctic foraging mothers. Pup blood delta C-13 values decreased by 1.1 parts per thousand over the study period regardless of their sex and the presumed foraging habitat of their mothers. Together, these results suggest an ecological change is occurring within the Indian sector of the Southern Ocean with possible consequences on the foraging performance of southern elephant seals. We hypothesize that this shift in delta C-13 is related to a change in primary production and/or in the composition of phytoplankton communities, but this requires further multidisciplinary investigations. Article in Journal/Newspaper Antarc* Antarctic Elephant Seals Kerguelen Islands Southern Elephant Seals Southern Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Antarctic Indian Kerguelen Kerguelen Islands Southern Ocean Proceedings of the Royal Society B: Biological Sciences 287 1933 20201544 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
foraging habitat stable isotopes bio-logging population strategies decadal change Indian sector of the Southern Ocean |
spellingShingle |
foraging habitat stable isotopes bio-logging population strategies decadal change Indian sector of the Southern Ocean Mestre, Julie Authier, Matthieu Cherel, Yves Harcourt, Rob Mcmahon, Clive R. Hindell, Mark A. Charrassin, Jean-benoit Guinet, Christophe Decadal changes in blood delta C-13 values, at-sea distribution, and weaning mass of southern elephant seals from Kerguelen Islands |
topic_facet |
foraging habitat stable isotopes bio-logging population strategies decadal change Indian sector of the Southern Ocean |
description |
Changes in the foraging environment and at-sea distribution of southern elephant seals from Kerguelen Islands were investigated over a decade (2004-2018) using tracking, weaning mass, and blood delta C-13 values. Females showed either a sub-Antarctic or an Antarctic foraging strategy, and no significant shift in their at-sea distribution was detected between 2004 and 2017. The proportion of females foraging in sub-Antarctic versus Antarctic habitats did not change over the 2006-2018 period. Pup weaning mass varied according to the foraging habitat of their mothers. The weaning mass of sub-Antarctic foraging mothers' pups decreased by 11.7 kg over the study period, but they were on average 5.8 kg heavier than pups from Antarctic foraging mothers. Pup blood delta C-13 values decreased by 1.1 parts per thousand over the study period regardless of their sex and the presumed foraging habitat of their mothers. Together, these results suggest an ecological change is occurring within the Indian sector of the Southern Ocean with possible consequences on the foraging performance of southern elephant seals. We hypothesize that this shift in delta C-13 is related to a change in primary production and/or in the composition of phytoplankton communities, but this requires further multidisciplinary investigations. |
format |
Article in Journal/Newspaper |
author |
Mestre, Julie Authier, Matthieu Cherel, Yves Harcourt, Rob Mcmahon, Clive R. Hindell, Mark A. Charrassin, Jean-benoit Guinet, Christophe |
author_facet |
Mestre, Julie Authier, Matthieu Cherel, Yves Harcourt, Rob Mcmahon, Clive R. Hindell, Mark A. Charrassin, Jean-benoit Guinet, Christophe |
author_sort |
Mestre, Julie |
title |
Decadal changes in blood delta C-13 values, at-sea distribution, and weaning mass of southern elephant seals from Kerguelen Islands |
title_short |
Decadal changes in blood delta C-13 values, at-sea distribution, and weaning mass of southern elephant seals from Kerguelen Islands |
title_full |
Decadal changes in blood delta C-13 values, at-sea distribution, and weaning mass of southern elephant seals from Kerguelen Islands |
title_fullStr |
Decadal changes in blood delta C-13 values, at-sea distribution, and weaning mass of southern elephant seals from Kerguelen Islands |
title_full_unstemmed |
Decadal changes in blood delta C-13 values, at-sea distribution, and weaning mass of southern elephant seals from Kerguelen Islands |
title_sort |
decadal changes in blood delta c-13 values, at-sea distribution, and weaning mass of southern elephant seals from kerguelen islands |
publisher |
Royal Soc |
publishDate |
2020 |
url |
https://archimer.ifremer.fr/doc/00659/77078/78422.pdf https://archimer.ifremer.fr/doc/00659/77078/78423.pdf https://archimer.ifremer.fr/doc/00659/77078/78424.pdf https://archimer.ifremer.fr/doc/00659/77078/78425.pdf https://archimer.ifremer.fr/doc/00659/77078/78426.pdf https://doi.org/10.1098/rspb.2020.1544 https://archimer.ifremer.fr/doc/00659/77078/ |
geographic |
Antarctic Indian Kerguelen Kerguelen Islands Southern Ocean |
geographic_facet |
Antarctic Indian Kerguelen Kerguelen Islands Southern Ocean |
genre |
Antarc* Antarctic Elephant Seals Kerguelen Islands Southern Elephant Seals Southern Ocean |
genre_facet |
Antarc* Antarctic Elephant Seals Kerguelen Islands Southern Elephant Seals Southern Ocean |
op_source |
Proceedings Of The Royal Society B-biological Sciences (0962-8452) (Royal Soc), 2020-08 , Vol. 287 , N. 1933 , P. 20201544 (10p.) |
op_relation |
https://archimer.ifremer.fr/doc/00659/77078/78422.pdf https://archimer.ifremer.fr/doc/00659/77078/78423.pdf https://archimer.ifremer.fr/doc/00659/77078/78424.pdf https://archimer.ifremer.fr/doc/00659/77078/78425.pdf https://archimer.ifremer.fr/doc/00659/77078/78426.pdf doi:10.1098/rspb.2020.1544 https://archimer.ifremer.fr/doc/00659/77078/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1098/rspb.2020.1544 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
287 |
container_issue |
1933 |
container_start_page |
20201544 |
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1766247520794574848 |