Supplementary material from "Polar bears are inefficient predators of seabird eggs"
Climate-mediated sea-ice loss is disrupting the foraging ecology of polar bears ( Ursus maritimus ) across much of their range. As a result, there have been increased reports of polar bears foraging on seabird eggs across parts of their range. Given that polar bears have evolved to hunt seals on ice...
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ftdatacite:10.6084/m9.figshare.c.5361976 2023-05-15T15:55:57+02:00 Supplementary material from "Polar bears are inefficient predators of seabird eggs" Jagielski, Patrick M. Dey, Cody J. Gilchrist, H. Grant Richardson, Evan S. Love, Oliver P. Semeniuk, Christina A. D. 2021 https://dx.doi.org/10.6084/m9.figshare.c.5361976 https://rs.figshare.com/collections/Supplementary_material_from_Polar_bears_are_inefficient_predators_of_seabird_eggs_/5361976 unknown The Royal Society https://dx.doi.org/10.1098/rsos.210391 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Evolutionary Biology FOS Biological sciences Ecology 60801 Animal Behaviour Collection article 2021 ftdatacite https://doi.org/10.6084/m9.figshare.c.5361976 https://doi.org/10.1098/rsos.210391 2021-11-05T12:55:41Z Climate-mediated sea-ice loss is disrupting the foraging ecology of polar bears ( Ursus maritimus ) across much of their range. As a result, there have been increased reports of polar bears foraging on seabird eggs across parts of their range. Given that polar bears have evolved to hunt seals on ice, they may not be efficient predators of seabird eggs. We investigated polar bears' foraging performance on common eider ( Somateria mollissima ) eggs on Mitivik Island, Nunavut, Canada to test whether bear decision-making heuristics are consistent with expectations of optimal foraging theory. Using aerial-drones, we recorded multiple foraging bouts over 11 days, and found that as clutches were depleted to completion, bears did not exhibit foraging behaviours matched to resource density. As the season progressed, bears visited fewer nests overall, but marginally increased their visitation to nests that were already empty. Bears did not display different movement modes related to nest density, but became less selective in their choice of clutches to consume. Lastly, bears that capitalized on visual cues of flushing eider hens significantly increased the number of clutches they consumed; however, they did not use this strategy consistently or universally. The foraging behaviours exhibited by polar bears in this study suggest they are inefficient predators of seabird eggs, particularly in the context of matching behaviours to resource density. Article in Journal/Newspaper Common Eider Nunavut Sea ice Somateria mollissima Ursus maritimus DataCite Metadata Store (German National Library of Science and Technology) Nunavut Canada |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Evolutionary Biology FOS Biological sciences Ecology 60801 Animal Behaviour |
spellingShingle |
Evolutionary Biology FOS Biological sciences Ecology 60801 Animal Behaviour Jagielski, Patrick M. Dey, Cody J. Gilchrist, H. Grant Richardson, Evan S. Love, Oliver P. Semeniuk, Christina A. D. Supplementary material from "Polar bears are inefficient predators of seabird eggs" |
topic_facet |
Evolutionary Biology FOS Biological sciences Ecology 60801 Animal Behaviour |
description |
Climate-mediated sea-ice loss is disrupting the foraging ecology of polar bears ( Ursus maritimus ) across much of their range. As a result, there have been increased reports of polar bears foraging on seabird eggs across parts of their range. Given that polar bears have evolved to hunt seals on ice, they may not be efficient predators of seabird eggs. We investigated polar bears' foraging performance on common eider ( Somateria mollissima ) eggs on Mitivik Island, Nunavut, Canada to test whether bear decision-making heuristics are consistent with expectations of optimal foraging theory. Using aerial-drones, we recorded multiple foraging bouts over 11 days, and found that as clutches were depleted to completion, bears did not exhibit foraging behaviours matched to resource density. As the season progressed, bears visited fewer nests overall, but marginally increased their visitation to nests that were already empty. Bears did not display different movement modes related to nest density, but became less selective in their choice of clutches to consume. Lastly, bears that capitalized on visual cues of flushing eider hens significantly increased the number of clutches they consumed; however, they did not use this strategy consistently or universally. The foraging behaviours exhibited by polar bears in this study suggest they are inefficient predators of seabird eggs, particularly in the context of matching behaviours to resource density. |
format |
Article in Journal/Newspaper |
author |
Jagielski, Patrick M. Dey, Cody J. Gilchrist, H. Grant Richardson, Evan S. Love, Oliver P. Semeniuk, Christina A. D. |
author_facet |
Jagielski, Patrick M. Dey, Cody J. Gilchrist, H. Grant Richardson, Evan S. Love, Oliver P. Semeniuk, Christina A. D. |
author_sort |
Jagielski, Patrick M. |
title |
Supplementary material from "Polar bears are inefficient predators of seabird eggs" |
title_short |
Supplementary material from "Polar bears are inefficient predators of seabird eggs" |
title_full |
Supplementary material from "Polar bears are inefficient predators of seabird eggs" |
title_fullStr |
Supplementary material from "Polar bears are inefficient predators of seabird eggs" |
title_full_unstemmed |
Supplementary material from "Polar bears are inefficient predators of seabird eggs" |
title_sort |
supplementary material from "polar bears are inefficient predators of seabird eggs" |
publisher |
The Royal Society |
publishDate |
2021 |
url |
https://dx.doi.org/10.6084/m9.figshare.c.5361976 https://rs.figshare.com/collections/Supplementary_material_from_Polar_bears_are_inefficient_predators_of_seabird_eggs_/5361976 |
geographic |
Nunavut Canada |
geographic_facet |
Nunavut Canada |
genre |
Common Eider Nunavut Sea ice Somateria mollissima Ursus maritimus |
genre_facet |
Common Eider Nunavut Sea ice Somateria mollissima Ursus maritimus |
op_relation |
https://dx.doi.org/10.1098/rsos.210391 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.c.5361976 https://doi.org/10.1098/rsos.210391 |
_version_ |
1766391430954090496 |