Polar bear body temperatures and behavior in the changing Arctic summer (1104.25)
In the Arctic summer, extent and duration of sea ice melt is increasing, displacing Alaskan polar bears from ice in productive near‐shore waters to deep‐water ice or to land. In these habitats, seal prey is likely at low availability. Additionally, extensive open water may increase long‐distance swi...
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Online Access: | http://dx.doi.org/10.1096/fasebj.28.1_supplement.1104.25 |
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crwiley:10.1096/fasebj.28.1_supplement.1104.25 2024-06-02T08:01:30+00:00 Polar bear body temperatures and behavior in the changing Arctic summer (1104.25) Whiteman, John Harlow, Henry Ben‐David, Merav Durner, George National Science Foundation 2014 http://dx.doi.org/10.1096/fasebj.28.1_supplement.1104.25 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor The FASEB Journal volume 28, issue S1 ISSN 0892-6638 1530-6860 journal-article 2014 crwiley https://doi.org/10.1096/fasebj.28.1_supplement.1104.25 2024-05-03T11:49:59Z In the Arctic summer, extent and duration of sea ice melt is increasing, displacing Alaskan polar bears from ice in productive near‐shore waters to deep‐water ice or to land. In these habitats, seal prey is likely at low availability. Additionally, extensive open water may increase long‐distance swimming. It is unknown how these changes affect metabolic rates and thermoregulation of polar bears. We recorded body temperature (T b ) with loggers implanted adjacent to the abdominal peritoneum, ventral to the linea alba, in 4 bears on deep‐water ice (May–Oct) and 5 bears on shore (Aug–Oct) in the Beaufort Sea. T b of ice bears declined from a weekly mean of 37.2–37.5°C (May 23–Jun 03) to 34.7–36.6°C (Sep 21–Oct 09). Bears had unexpected, rapid bouts of T b decline and recovery. In Aug–Oct, ice bears averaged 0.65 bouts per day (95% were 蠄 12 hours) that reached a mean minimum T b of 33.6°C; shore bears averaged 1.06 bouts per day (94% were 蠄 12 hours) that reached a mean minimum T b of 28.6°C. The cause of these bouts and why they were more frequent and reached a lower T b for bears on shore is not clear. Pending analyses contrast T b to data collected from loggers implanted in the rump; relationships between bouts of low T b and swimming behavior; and implications of these patterns for polar bears in the changing Arctic summer. Grant Funding Source : National Science Foundation 0732713 Article in Journal/Newspaper Arctic Beaufort Sea Sea ice Wiley Online Library Arctic The FASEB Journal 28 S1 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
In the Arctic summer, extent and duration of sea ice melt is increasing, displacing Alaskan polar bears from ice in productive near‐shore waters to deep‐water ice or to land. In these habitats, seal prey is likely at low availability. Additionally, extensive open water may increase long‐distance swimming. It is unknown how these changes affect metabolic rates and thermoregulation of polar bears. We recorded body temperature (T b ) with loggers implanted adjacent to the abdominal peritoneum, ventral to the linea alba, in 4 bears on deep‐water ice (May–Oct) and 5 bears on shore (Aug–Oct) in the Beaufort Sea. T b of ice bears declined from a weekly mean of 37.2–37.5°C (May 23–Jun 03) to 34.7–36.6°C (Sep 21–Oct 09). Bears had unexpected, rapid bouts of T b decline and recovery. In Aug–Oct, ice bears averaged 0.65 bouts per day (95% were 蠄 12 hours) that reached a mean minimum T b of 33.6°C; shore bears averaged 1.06 bouts per day (94% were 蠄 12 hours) that reached a mean minimum T b of 28.6°C. The cause of these bouts and why they were more frequent and reached a lower T b for bears on shore is not clear. Pending analyses contrast T b to data collected from loggers implanted in the rump; relationships between bouts of low T b and swimming behavior; and implications of these patterns for polar bears in the changing Arctic summer. Grant Funding Source : National Science Foundation 0732713 |
author2 |
National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Whiteman, John Harlow, Henry Ben‐David, Merav Durner, George |
spellingShingle |
Whiteman, John Harlow, Henry Ben‐David, Merav Durner, George Polar bear body temperatures and behavior in the changing Arctic summer (1104.25) |
author_facet |
Whiteman, John Harlow, Henry Ben‐David, Merav Durner, George |
author_sort |
Whiteman, John |
title |
Polar bear body temperatures and behavior in the changing Arctic summer (1104.25) |
title_short |
Polar bear body temperatures and behavior in the changing Arctic summer (1104.25) |
title_full |
Polar bear body temperatures and behavior in the changing Arctic summer (1104.25) |
title_fullStr |
Polar bear body temperatures and behavior in the changing Arctic summer (1104.25) |
title_full_unstemmed |
Polar bear body temperatures and behavior in the changing Arctic summer (1104.25) |
title_sort |
polar bear body temperatures and behavior in the changing arctic summer (1104.25) |
publisher |
Wiley |
publishDate |
2014 |
url |
http://dx.doi.org/10.1096/fasebj.28.1_supplement.1104.25 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Beaufort Sea Sea ice |
genre_facet |
Arctic Beaufort Sea Sea ice |
op_source |
The FASEB Journal volume 28, issue S1 ISSN 0892-6638 1530-6860 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1096/fasebj.28.1_supplement.1104.25 |
container_title |
The FASEB Journal |
container_volume |
28 |
container_issue |
S1 |
_version_ |
1800745886864637952 |