Individual variation in migratory movements of chinstrap penguins leads to widespread occupancy of ice-free winter habitats over the continental shelf and deep ocean basins of the Southern Ocean.
A goal of tracking migratory animals is to characterize the habitats they use and to interpret population processes with respect to conditions experienced en route to, and within, overwintering areas. For migratory seabirds with broad breeding ranges, inferring population-level effects of environmen...
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ftdoajarticles:oai:doaj.org/article:169b031d52ba4377bdb2b9ff53dd3c31 2023-05-15T13:35:48+02:00 Individual variation in migratory movements of chinstrap penguins leads to widespread occupancy of ice-free winter habitats over the continental shelf and deep ocean basins of the Southern Ocean. Jefferson T Hinke Maria M Santos Malgorzata Korczak-Abshire Gennadi Milinevsky George M Watters 2019-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0226207 https://doaj.org/article/169b031d52ba4377bdb2b9ff53dd3c31 EN eng Public Library of Science (PLoS) https://doi.org/10.1371/journal.pone.0226207 https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0226207 https://doaj.org/article/169b031d52ba4377bdb2b9ff53dd3c31 PLoS ONE, Vol 14, Iss 12, p e0226207 (2019) Medicine R Science Q article 2019 ftdoajarticles https://doi.org/10.1371/journal.pone.0226207 2022-12-31T10:23:46Z A goal of tracking migratory animals is to characterize the habitats they use and to interpret population processes with respect to conditions experienced en route to, and within, overwintering areas. For migratory seabirds with broad breeding ranges, inferring population-level effects of environmental conditions that are experienced during migratory periods would benefit by directly comparing how birds from different breeding aggregations disperse, characterizing the physical conditions of areas they use, and determining whether they occupy shared foraging areas. We therefore tracked 41 adult and juvenile chinstrap penguins (Pygoscelis antarctica) from three breeding locations in the northern Antarctic Peninsula region during the austral winter of 2017. The satellite tracking data revealed overlap of individuals over continental shelf areas during autumn months (Mar-May), shared outbound corridors that track the southern Antarctic circumpolar current front, followed by occupancy of progressively colder, deeper, and ice-free waters that spanned the entire western hemisphere south of the Polar Front. Despite broadly similar physical environments used by individuals from different colonies, the proportion of birds from each colony that remained within 500km of their colony was positively correlated with their local population trends. This suggests that local migration strategies near the Antarctic Peninsula may benefit breeding populations. However, the magnitude of inter-colony and intra-colony overlap was generally low given the broad scale of habitats occupied. High individual variation in winter movements suggests that habitat selection among chinstrap penguins is more opportunistic, without clear colony-specific preference for fine-scale foraging hotspots. Mixing of individuals from multiple colonies across broad regions of the Southern Ocean would expose chinstrap penguins from the Antarctic Peninsula to a shared environmental experience that helps explain the regional decline in their abundance. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Pygoscelis antarctica Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean The Antarctic Antarctic Peninsula Austral PLOS ONE 14 12 e0226207 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Jefferson T Hinke Maria M Santos Malgorzata Korczak-Abshire Gennadi Milinevsky George M Watters Individual variation in migratory movements of chinstrap penguins leads to widespread occupancy of ice-free winter habitats over the continental shelf and deep ocean basins of the Southern Ocean. |
topic_facet |
Medicine R Science Q |
description |
A goal of tracking migratory animals is to characterize the habitats they use and to interpret population processes with respect to conditions experienced en route to, and within, overwintering areas. For migratory seabirds with broad breeding ranges, inferring population-level effects of environmental conditions that are experienced during migratory periods would benefit by directly comparing how birds from different breeding aggregations disperse, characterizing the physical conditions of areas they use, and determining whether they occupy shared foraging areas. We therefore tracked 41 adult and juvenile chinstrap penguins (Pygoscelis antarctica) from three breeding locations in the northern Antarctic Peninsula region during the austral winter of 2017. The satellite tracking data revealed overlap of individuals over continental shelf areas during autumn months (Mar-May), shared outbound corridors that track the southern Antarctic circumpolar current front, followed by occupancy of progressively colder, deeper, and ice-free waters that spanned the entire western hemisphere south of the Polar Front. Despite broadly similar physical environments used by individuals from different colonies, the proportion of birds from each colony that remained within 500km of their colony was positively correlated with their local population trends. This suggests that local migration strategies near the Antarctic Peninsula may benefit breeding populations. However, the magnitude of inter-colony and intra-colony overlap was generally low given the broad scale of habitats occupied. High individual variation in winter movements suggests that habitat selection among chinstrap penguins is more opportunistic, without clear colony-specific preference for fine-scale foraging hotspots. Mixing of individuals from multiple colonies across broad regions of the Southern Ocean would expose chinstrap penguins from the Antarctic Peninsula to a shared environmental experience that helps explain the regional decline in their abundance. |
format |
Article in Journal/Newspaper |
author |
Jefferson T Hinke Maria M Santos Malgorzata Korczak-Abshire Gennadi Milinevsky George M Watters |
author_facet |
Jefferson T Hinke Maria M Santos Malgorzata Korczak-Abshire Gennadi Milinevsky George M Watters |
author_sort |
Jefferson T Hinke |
title |
Individual variation in migratory movements of chinstrap penguins leads to widespread occupancy of ice-free winter habitats over the continental shelf and deep ocean basins of the Southern Ocean. |
title_short |
Individual variation in migratory movements of chinstrap penguins leads to widespread occupancy of ice-free winter habitats over the continental shelf and deep ocean basins of the Southern Ocean. |
title_full |
Individual variation in migratory movements of chinstrap penguins leads to widespread occupancy of ice-free winter habitats over the continental shelf and deep ocean basins of the Southern Ocean. |
title_fullStr |
Individual variation in migratory movements of chinstrap penguins leads to widespread occupancy of ice-free winter habitats over the continental shelf and deep ocean basins of the Southern Ocean. |
title_full_unstemmed |
Individual variation in migratory movements of chinstrap penguins leads to widespread occupancy of ice-free winter habitats over the continental shelf and deep ocean basins of the Southern Ocean. |
title_sort |
individual variation in migratory movements of chinstrap penguins leads to widespread occupancy of ice-free winter habitats over the continental shelf and deep ocean basins of the southern ocean. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2019 |
url |
https://doi.org/10.1371/journal.pone.0226207 https://doaj.org/article/169b031d52ba4377bdb2b9ff53dd3c31 |
geographic |
Antarctic Southern Ocean The Antarctic Antarctic Peninsula Austral |
geographic_facet |
Antarctic Southern Ocean The Antarctic Antarctic Peninsula Austral |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Pygoscelis antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Pygoscelis antarctica Southern Ocean |
op_source |
PLoS ONE, Vol 14, Iss 12, p e0226207 (2019) |
op_relation |
https://doi.org/10.1371/journal.pone.0226207 https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0226207 https://doaj.org/article/169b031d52ba4377bdb2b9ff53dd3c31 |
op_doi |
https://doi.org/10.1371/journal.pone.0226207 |
container_title |
PLOS ONE |
container_volume |
14 |
container_issue |
12 |
container_start_page |
e0226207 |
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1766070596350771200 |