Heart rate during hyperphagia differs between two bear species
Hyperphagia is a critical part of the yearly cycle of bears when they gain fat reserves before entering hibernation. We used heart rate as a proxy to compare the metabolic rate between the Asian black bear ( Ursus thibetanus ) in Japan and the Eurasian brown bear ( Ursus arctos ) in Sweden from summ...
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crroyalsociety:10.1098/rsbl.2018.0681 2024-06-02T08:15:36+00:00 Heart rate during hyperphagia differs between two bear species Fuchs, Boris Yamazaki, Koji Evans, Alina L. Tsubota, Toshio Koike, Shinsuke Naganuma, Tomoko Arnemo, Jon M. Medtronic Japan Society for the Promotion of Science The Swedish Envirnonmental Protection Agencie Erasmus Plus International Research School in Applied Ecology The Norwegian Environment Agency inland norway university of applied sciences Norges Forskningsråd 2019 http://dx.doi.org/10.1098/rsbl.2018.0681 https://royalsocietypublishing.org/doi/pdf/10.1098/rsbl.2018.0681 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsbl.2018.0681 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Biology Letters volume 15, issue 1, page 20180681 ISSN 1744-9561 1744-957X journal-article 2019 crroyalsociety https://doi.org/10.1098/rsbl.2018.0681 2024-05-07T14:16:41Z Hyperphagia is a critical part of the yearly cycle of bears when they gain fat reserves before entering hibernation. We used heart rate as a proxy to compare the metabolic rate between the Asian black bear ( Ursus thibetanus ) in Japan and the Eurasian brown bear ( Ursus arctos ) in Sweden from summer into hibernation. In the hyperphagic period, black bears feed on fat- and carbohydrate-rich hard masts whereas brown bears feed on sugar-rich berries. Availability of hard masts has quantitative and spatial annual fluctuations, which might require increased activity and result in intraspecific stress. Using generalized additive mixed models we analysed the differences in heart rate between the two species. Black bears had decreased heart rates during summer but had doubled heart rate values throughout the hyperphagic period compared to brown bears. This letter illustrates the different physiological consequences of seasonal differences in food availability in two species of the same genus dealing with the same phenological challenge. Article in Journal/Newspaper Ursus arctos The Royal Society Biology Letters 15 1 20180681 |
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Open Polar |
collection |
The Royal Society |
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crroyalsociety |
language |
English |
description |
Hyperphagia is a critical part of the yearly cycle of bears when they gain fat reserves before entering hibernation. We used heart rate as a proxy to compare the metabolic rate between the Asian black bear ( Ursus thibetanus ) in Japan and the Eurasian brown bear ( Ursus arctos ) in Sweden from summer into hibernation. In the hyperphagic period, black bears feed on fat- and carbohydrate-rich hard masts whereas brown bears feed on sugar-rich berries. Availability of hard masts has quantitative and spatial annual fluctuations, which might require increased activity and result in intraspecific stress. Using generalized additive mixed models we analysed the differences in heart rate between the two species. Black bears had decreased heart rates during summer but had doubled heart rate values throughout the hyperphagic period compared to brown bears. This letter illustrates the different physiological consequences of seasonal differences in food availability in two species of the same genus dealing with the same phenological challenge. |
author2 |
Medtronic Japan Society for the Promotion of Science The Swedish Envirnonmental Protection Agencie Erasmus Plus International Research School in Applied Ecology The Norwegian Environment Agency inland norway university of applied sciences Norges Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Fuchs, Boris Yamazaki, Koji Evans, Alina L. Tsubota, Toshio Koike, Shinsuke Naganuma, Tomoko Arnemo, Jon M. |
spellingShingle |
Fuchs, Boris Yamazaki, Koji Evans, Alina L. Tsubota, Toshio Koike, Shinsuke Naganuma, Tomoko Arnemo, Jon M. Heart rate during hyperphagia differs between two bear species |
author_facet |
Fuchs, Boris Yamazaki, Koji Evans, Alina L. Tsubota, Toshio Koike, Shinsuke Naganuma, Tomoko Arnemo, Jon M. |
author_sort |
Fuchs, Boris |
title |
Heart rate during hyperphagia differs between two bear species |
title_short |
Heart rate during hyperphagia differs between two bear species |
title_full |
Heart rate during hyperphagia differs between two bear species |
title_fullStr |
Heart rate during hyperphagia differs between two bear species |
title_full_unstemmed |
Heart rate during hyperphagia differs between two bear species |
title_sort |
heart rate during hyperphagia differs between two bear species |
publisher |
The Royal Society |
publishDate |
2019 |
url |
http://dx.doi.org/10.1098/rsbl.2018.0681 https://royalsocietypublishing.org/doi/pdf/10.1098/rsbl.2018.0681 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsbl.2018.0681 |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_source |
Biology Letters volume 15, issue 1, page 20180681 ISSN 1744-9561 1744-957X |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rsbl.2018.0681 |
container_title |
Biology Letters |
container_volume |
15 |
container_issue |
1 |
container_start_page |
20180681 |
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1800739837079191552 |