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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Online Access: | https://hdl.handle.net/11250/2654988 https://doi.org/10.1098/rsos.191429 |
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ftninstnf:oai:brage.nina.no:11250/2654988 2024-06-23T07:46:16+00:00 Antarctic petrels ‘on the ice rocks’: wintering strategy of an Antarctic seabird Delord, Karine Kato, A. Tarroux, Arnaud Orgeret, F. Cotté, C. Ropert-Coudert, Yan Cherel, Y. Descamps, Sebastien 2020 application/pdf https://hdl.handle.net/11250/2654988 https://doi.org/10.1098/rsos.191429 eng eng Norges forskningsråd: NARE Programme Andre: BNP Paribas Foundation urn:issn:2054-5703 https://hdl.handle.net/11250/2654988 https://doi.org/10.1098/rsos.191429 cristin:1807501 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2020 The Authors. 7 Royal Society Open Science Ecology conservation global change biology behaviour geolocation austral winter distribution sea-ice concentration iceberg activity pattern lunar cycle VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Peer reviewed Journal article 2020 ftninstnf https://doi.org/10.1098/rsos.191429 2024-06-07T03:57:56Z 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 theWeddell 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 δ15N 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 seaice cycle and icebergs suggests the species can serve, year-round, as a sentinel of environmental changes for this remote region. publishedVersion Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctica Euphausia superba Iceberg* Sea ice Southern Ocean Thalassoica antarctica Norwegian Institute for Nature Research: Brage NINA Antarctic Southern Ocean Austral Svarthamaren ENVELOPE(3.423,3.423,-54.438,-54.438) Royal Society Open Science 7 4 191429 |
institution |
Open Polar |
collection |
Norwegian Institute for Nature Research: Brage NINA |
op_collection_id |
ftninstnf |
language |
English |
topic |
Ecology conservation global change biology behaviour geolocation austral winter distribution sea-ice concentration iceberg activity pattern lunar cycle VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
spellingShingle |
Ecology conservation global change biology behaviour geolocation austral winter distribution sea-ice concentration iceberg activity pattern lunar cycle VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Delord, Karine Kato, A. Tarroux, Arnaud Orgeret, F. Cotté, C. Ropert-Coudert, Yan Cherel, Y. Descamps, Sebastien Antarctic petrels ‘on the ice rocks’: wintering strategy of an Antarctic seabird |
topic_facet |
Ecology conservation global change biology behaviour geolocation austral winter distribution sea-ice concentration iceberg activity pattern lunar cycle VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
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 theWeddell 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 δ15N 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 seaice cycle and icebergs suggests the species can serve, year-round, as a sentinel of environmental changes for this remote region. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Delord, Karine Kato, A. Tarroux, Arnaud Orgeret, F. Cotté, C. Ropert-Coudert, Yan Cherel, Y. Descamps, Sebastien |
author_facet |
Delord, Karine Kato, A. Tarroux, Arnaud Orgeret, F. Cotté, C. Ropert-Coudert, Yan Cherel, Y. Descamps, Sebastien |
author_sort |
Delord, Karine |
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 |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2654988 https://doi.org/10.1098/rsos.191429 |
long_lat |
ENVELOPE(3.423,3.423,-54.438,-54.438) |
geographic |
Antarctic Southern Ocean Austral Svarthamaren |
geographic_facet |
Antarctic Southern Ocean Austral Svarthamaren |
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 |
7 Royal Society Open Science |
op_relation |
Norges forskningsråd: NARE Programme Andre: BNP Paribas Foundation urn:issn:2054-5703 https://hdl.handle.net/11250/2654988 https://doi.org/10.1098/rsos.191429 cristin:1807501 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2020 The Authors. |
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 |
_version_ |
1802644903006568448 |