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 summer i...
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ftpubmed:oai:pubmedcentral.nih.gov:6371904 2023-05-15T18:42:03+02:00 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. 2019-01 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6371904/ https://doi.org/10.1098/rsbl.2018.0681 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6371904/ http://dx.doi.org/10.1098/rsbl.2018.0681 © 2019 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. CC-BY Physiology Text 2019 ftpubmed https://doi.org/10.1098/rsbl.2018.0681 2019-03-03T01:24:36Z 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. Text Ursus arctos PubMed Central (PMC) Biology Letters 15 1 20180681 |
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PubMed Central (PMC) |
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English |
topic |
Physiology |
spellingShingle |
Physiology 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 |
topic_facet |
Physiology |
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. |
format |
Text |
author |
Fuchs, Boris Yamazaki, Koji Evans, Alina L. Tsubota, Toshio Koike, Shinsuke Naganuma, Tomoko Arnemo, Jon M. |
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://www.ncbi.nlm.nih.gov/pmc/articles/PMC6371904/ https://doi.org/10.1098/rsbl.2018.0681 |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6371904/ http://dx.doi.org/10.1098/rsbl.2018.0681 |
op_rights |
© 2019 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. |
op_rightsnorm |
CC-BY |
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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1766231647055773696 |