Antarctic petrels ‘on the ice rocks’: wintering strategy of an Antarctic seabird
There is a paucity of information on the foraging ecology, especially individual use of sea-ice features and icebergs, over the non-breeding season in many seabird species. Using geolocators and stable isotopes, we defined the movements, distribution and diet of adult Antarctic petrels Thalassoica a...
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ftpubmed:oai:pubmedcentral.nih.gov:7211841 2023-05-15T14:05:02+02:00 Antarctic petrels ‘on the ice rocks’: wintering strategy of an Antarctic seabird Delord, K. Kato, A. Tarroux, A. Orgeret, F. Cotté, C. Ropert-Coudert, Y. Cherel, Y. Descamps, S. 2020-04-01 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7211841/ https://doi.org/10.1098/rsos.191429 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7211841/ http://dx.doi.org/10.1098/rsos.191429 © 2020 The Authors. http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/http://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. CC-BY R Soc Open Sci Ecology Conservation and Global Change Biology Text 2020 ftpubmed https://doi.org/10.1098/rsos.191429 2020-05-24T00:23:00Z There is a paucity of information on the foraging ecology, especially individual use of sea-ice features and icebergs, over the non-breeding season in many seabird species. Using geolocators and stable isotopes, we defined the movements, distribution and diet of adult Antarctic petrels Thalassoica antarctica from the largest known breeding colony, the inland Svarthamaren, Antarctica. More specifically, we examined how sea-ice concentration and free-drifting icebergs affect the distribution of Antarctic petrels. After breeding, birds moved north to the marginal ice zone (MIZ) in the Weddell sector of the Southern Ocean, following its northward extension during freeze-up in April, and they wintered there in April–August. There, the birds stayed predominantly out of the water (60–80% of the time) suggesting they use icebergs as platforms to stand on and/or to rest. Feather δ(15)N values encompassed one full trophic level, indicating that birds fed on various proportions of crustaceans and fish/squid, most likely Antarctic krill Euphausia superba and the myctophid fish Electrona antarctica and/or the squid Psychroteuthis glacialis. Birds showed strong affinity for the open waters of the northern boundary of the MIZ, an important iceberg transit area, which offers roosting opportunities and rich prey fields. The strong association of Antarctic petrels with sea-ice cycle and icebergs suggests the species can serve, year-round, as a sentinel of environmental changes for this remote region. Text Antarc* Antarctic Antarctic Krill Antarctica Euphausia superba Iceberg* Sea ice Southern Ocean Thalassoica antarctica PubMed Central (PMC) Antarctic Southern Ocean Svarthamaren ENVELOPE(3.423,3.423,-54.438,-54.438) Weddell Royal Society Open Science 7 4 191429 |
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PubMed Central (PMC) |
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ftpubmed |
language |
English |
topic |
Ecology Conservation and Global Change Biology |
spellingShingle |
Ecology Conservation and Global Change Biology Delord, K. Kato, A. Tarroux, A. Orgeret, F. Cotté, C. Ropert-Coudert, Y. Cherel, Y. Descamps, S. Antarctic petrels ‘on the ice rocks’: wintering strategy of an Antarctic seabird |
topic_facet |
Ecology Conservation and Global Change Biology |
description |
There is a paucity of information on the foraging ecology, especially individual use of sea-ice features and icebergs, over the non-breeding season in many seabird species. Using geolocators and stable isotopes, we defined the movements, distribution and diet of adult Antarctic petrels Thalassoica antarctica from the largest known breeding colony, the inland Svarthamaren, Antarctica. More specifically, we examined how sea-ice concentration and free-drifting icebergs affect the distribution of Antarctic petrels. After breeding, birds moved north to the marginal ice zone (MIZ) in the Weddell sector of the Southern Ocean, following its northward extension during freeze-up in April, and they wintered there in April–August. There, the birds stayed predominantly out of the water (60–80% of the time) suggesting they use icebergs as platforms to stand on and/or to rest. Feather δ(15)N values encompassed one full trophic level, indicating that birds fed on various proportions of crustaceans and fish/squid, most likely Antarctic krill Euphausia superba and the myctophid fish Electrona antarctica and/or the squid Psychroteuthis glacialis. Birds showed strong affinity for the open waters of the northern boundary of the MIZ, an important iceberg transit area, which offers roosting opportunities and rich prey fields. The strong association of Antarctic petrels with sea-ice cycle and icebergs suggests the species can serve, year-round, as a sentinel of environmental changes for this remote region. |
format |
Text |
author |
Delord, K. Kato, A. Tarroux, A. Orgeret, F. Cotté, C. Ropert-Coudert, Y. Cherel, Y. Descamps, S. |
author_facet |
Delord, K. Kato, A. Tarroux, A. Orgeret, F. Cotté, C. Ropert-Coudert, Y. Cherel, Y. Descamps, S. |
author_sort |
Delord, K. |
title |
Antarctic petrels ‘on the ice rocks’: wintering strategy of an Antarctic seabird |
title_short |
Antarctic petrels ‘on the ice rocks’: wintering strategy of an Antarctic seabird |
title_full |
Antarctic petrels ‘on the ice rocks’: wintering strategy of an Antarctic seabird |
title_fullStr |
Antarctic petrels ‘on the ice rocks’: wintering strategy of an Antarctic seabird |
title_full_unstemmed |
Antarctic petrels ‘on the ice rocks’: wintering strategy of an Antarctic seabird |
title_sort |
antarctic petrels ‘on the ice rocks’: wintering strategy of an antarctic seabird |
publisher |
The Royal Society |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7211841/ https://doi.org/10.1098/rsos.191429 |
long_lat |
ENVELOPE(3.423,3.423,-54.438,-54.438) |
geographic |
Antarctic Southern Ocean Svarthamaren Weddell |
geographic_facet |
Antarctic Southern Ocean Svarthamaren Weddell |
genre |
Antarc* Antarctic Antarctic Krill Antarctica Euphausia superba Iceberg* Sea ice Southern Ocean Thalassoica antarctica |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctica Euphausia superba Iceberg* Sea ice Southern Ocean Thalassoica antarctica |
op_source |
R Soc Open Sci |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7211841/ http://dx.doi.org/10.1098/rsos.191429 |
op_rights |
© 2020 The Authors. http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/http://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1098/rsos.191429 |
container_title |
Royal Society Open Science |
container_volume |
7 |
container_issue |
4 |
container_start_page |
191429 |
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1766276673076985856 |