Foraging behavior links sea ice to breeding success in Antarctic penguins
Population trends and breeding success variability of Adélie penguins, a bioindicator of Antarctic environments, have been attributed to changing sea-ice extents; however, causative mechanisms remain unclear. By electronically tagging 175 penguins in four seasons with contrasting sea-ice conditions,...
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ftpubmed:oai:pubmedcentral.nih.gov:7314529 2023-05-15T13:42:30+02:00 Foraging behavior links sea ice to breeding success in Antarctic penguins Watanabe, Yuuki Y. Ito, Kentaro Kokubun, Nobuo Takahashi, Akinori 2020-06-24 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7314529/ http://www.ncbi.nlm.nih.gov/pubmed/32637612 https://doi.org/10.1126/sciadv.aba4828 en eng American Association for the Advancement of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7314529/ http://www.ncbi.nlm.nih.gov/pubmed/32637612 http://dx.doi.org/10.1126/sciadv.aba4828 Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. CC-BY Sci Adv Research Articles Text 2020 ftpubmed https://doi.org/10.1126/sciadv.aba4828 2020-07-12T00:19:22Z Population trends and breeding success variability of Adélie penguins, a bioindicator of Antarctic environments, have been attributed to changing sea-ice extents; however, causative mechanisms remain unclear. By electronically tagging 175 penguins in four seasons with contrasting sea-ice conditions, we show that ice-free environments enhance, not deteriorate, foraging efficiencies and breeding success. In an ice-free season, penguins traveled by swimming rather than walking, leading to larger foraging areas, shorter trip durations, and lower energy expenditure than three ice-covered seasons. Freed from the need to find cracks for breathing, dive durations decreased, and more krill were captured per unit dive time, which may also be associated with phytoplankton blooms and increased krill density in the sunlit ice-free water. Consequently, adult body mass, chick growth rates, and breeding success increased. Our findings explain the regional population trends and demonstrate a key link among sea ice, foraging behavior, and reproductive success in this iconic species. Text Antarc* Antarctic Sea ice PubMed Central (PMC) Antarctic Freed ENVELOPE(164.333,164.333,-71.483,-71.483) Science Advances 6 26 eaba4828 |
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Research Articles Watanabe, Yuuki Y. Ito, Kentaro Kokubun, Nobuo Takahashi, Akinori Foraging behavior links sea ice to breeding success in Antarctic penguins |
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Research Articles |
description |
Population trends and breeding success variability of Adélie penguins, a bioindicator of Antarctic environments, have been attributed to changing sea-ice extents; however, causative mechanisms remain unclear. By electronically tagging 175 penguins in four seasons with contrasting sea-ice conditions, we show that ice-free environments enhance, not deteriorate, foraging efficiencies and breeding success. In an ice-free season, penguins traveled by swimming rather than walking, leading to larger foraging areas, shorter trip durations, and lower energy expenditure than three ice-covered seasons. Freed from the need to find cracks for breathing, dive durations decreased, and more krill were captured per unit dive time, which may also be associated with phytoplankton blooms and increased krill density in the sunlit ice-free water. Consequently, adult body mass, chick growth rates, and breeding success increased. Our findings explain the regional population trends and demonstrate a key link among sea ice, foraging behavior, and reproductive success in this iconic species. |
format |
Text |
author |
Watanabe, Yuuki Y. Ito, Kentaro Kokubun, Nobuo Takahashi, Akinori |
author_facet |
Watanabe, Yuuki Y. Ito, Kentaro Kokubun, Nobuo Takahashi, Akinori |
author_sort |
Watanabe, Yuuki Y. |
title |
Foraging behavior links sea ice to breeding success in Antarctic penguins |
title_short |
Foraging behavior links sea ice to breeding success in Antarctic penguins |
title_full |
Foraging behavior links sea ice to breeding success in Antarctic penguins |
title_fullStr |
Foraging behavior links sea ice to breeding success in Antarctic penguins |
title_full_unstemmed |
Foraging behavior links sea ice to breeding success in Antarctic penguins |
title_sort |
foraging behavior links sea ice to breeding success in antarctic penguins |
publisher |
American Association for the Advancement of Science |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7314529/ http://www.ncbi.nlm.nih.gov/pubmed/32637612 https://doi.org/10.1126/sciadv.aba4828 |
long_lat |
ENVELOPE(164.333,164.333,-71.483,-71.483) |
geographic |
Antarctic Freed |
geographic_facet |
Antarctic Freed |
genre |
Antarc* Antarctic Sea ice |
genre_facet |
Antarc* Antarctic Sea ice |
op_source |
Sci Adv |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7314529/ http://www.ncbi.nlm.nih.gov/pubmed/32637612 http://dx.doi.org/10.1126/sciadv.aba4828 |
op_rights |
Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
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CC-BY |
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https://doi.org/10.1126/sciadv.aba4828 |
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Science Advances |
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6 |
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26 |
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eaba4828 |
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