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Body mass is associ...
Body mass is associated with hibernation length, body temperature, and heart rate in free-ranging brown bears
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- Evans, Alina L. (författare)
- Department of Forestry and Wildlife Management, Faculty of Applied Ecology and Agricultural Sciences, Inland Norway University of Applied Sciences, Campus Evenstad, 2418, Elverum, Norway
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- Fuchs, Boris (författare)
- Department of Forestry and Wildlife Management, Faculty of Applied Ecology and Agricultural Sciences, Inland Norway University of Applied Sciences, Campus Evenstad, 2418, Elverum, Norway
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- Singh, Navinder (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för vilt, fisk och miljö,Department of Wildlife, Fish and Environmental Studies
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- Thiel, Alexandra (författare)
- Department of Forestry and Wildlife Management, Faculty of Applied Ecology and Agricultural Sciences, Inland Norway University of Applied Sciences, Campus Evenstad, 2418, Elverum, Norway
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- Giroud, Sylvain (författare)
- Reseach Institute of Wildlife Ecology, Department of Interdisciplinary Life Sciences, University of Veterinary Medicine, Savoyenstraße 1, 1160, Vienna, Austria; Energetics Lab, Department of Biology, Northern Michigan University, Marquette, USA
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- Blanc, Stephane (författare)
- Hubert Curien Multidisciplinary Institute, UMR 7178 CNRS/UDS, 23 Rue Becquerel, 67087, Strasbourg, France
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- Laske, Timothy G. (författare)
- Department of Surgery, University of Minnesota, Minneapolis, MN, 55455, USA
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- Fröbert, Ole, 1964- (författare)
- Örebro universitet,Institutionen för medicinska vetenskaper,Department of Cardiology, Faculty of Health, Örebro University, Örebro, Sweden
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- Friebe, Andrea (författare)
- Norwegian Institute for Nature Research, 7485, Trondheim, Norway
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- Swenson, Jon E. (författare)
- Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Post Box 5003, 1432, Ås, Norway
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- Arnemo, Jon (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för vilt, fisk och miljö,Department of Wildlife, Fish and Environmental Studies,Inland Norway University of Applied Sciences
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(creator_code:org_t)
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- BioMed Central (BMC), 2023
- 2023
- Engelska.
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Ingår i: Frontiers in Zoology. - : BioMed Central (BMC). - 1742-9994. ; 20:1
- Relaterad länk:
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https://doi.org/10.1...
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https://pub.epsilon.... (primary) (Raw object) (free)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://res.slu.se/i...
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Abstract
Ämnesord
Stäng
- BACKGROUND: Despite centuries of research, debate remains on the scaling of metabolic rate to mass especially for intraspecific cases. The high variation of body mass within brown bears presents a unique opportunity to study the intraspecific effects of body mass on physiological variables. The amplitude of metabolic rate reduction in hibernators is dependent on body mass of the species. Small hibernators have high metabolic rates when euthermic but experience a drastic decrease in body temperature during torpor, which is necessary to reach a very low metabolic rate. Conversely, large hibernators, such as the brown bear (Ursus arctos), show a moderate decrease in temperature during hibernation, thought to be related to the bear's large size. We studied body mass, abdominal body temperature, heart rate, and accelerometer-derived activity from 63 free-ranging brown bears (1-15 years old, 15-233 kg). We tested for relationships between body mass and body temperature, heart rate, and hibernation duration.RESULTS: The smallest individuals maintained lower body temperatures during hibernation, hibernated longer, and ended hibernation later than large bears. Unlike body temperature, winter heart rates were not associated with body mass. In summer, the opposite pattern was found, with smaller individuals having higher body temperature and daytime heart rates. Body mass was associated with body temperature in the winter hypometabolic state, even in a large hibernating mammal. Smaller bears, which are known to have higher thermal conductance, reached lower body temperatures during hibernation. During summer, smaller bears had higher body temperatures and daytime heart rates, a phenomenon not previously documented within a single mammalian species.CONCLUSION: We conclude that the smallest bears hibernated more deeply and longer than large bears, likely from a combined effect of basic thermodynamics, the higher need for energy savings, and a lower cost of warming up a smaller body.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Kardiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Cardiac and Cardiovascular Systems (hsv//eng)
- NATURVETENSKAP -- Biologi -- Zoologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Zoology (hsv//eng)
Nyckelord
- Brown bears
- Heart rate
- Hibernation
- Metabolic rate
- Thermal conductance
- Thermoregulation
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Evans, Alina L.
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Fuchs, Boris
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Singh, Navinder
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Thiel, Alexandra
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Giroud, Sylvain
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Blanc, Stephane
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Laske, Timothy G ...
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Fröbert, Ole, 19 ...
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Friebe, Andrea
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Swenson, Jon E.
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Arnemo, Jon
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- Om ämnet
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- MEDICIN OCH HÄLSOVETENSKAP
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MEDICIN OCH HÄLS ...
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och Klinisk medicin
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och Kardiologi
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- NATURVETENSKAP
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NATURVETENSKAP
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och Biologi
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och Zoologi
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Frontiers in Zoo ...
- Av lärosätet
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Örebro universitet
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Sveriges Lantbruksuniversitet