Body temperature and metabolic rate during natural hypothermia in endotherms
Abstract
During daily torpor and hibernation metabolic rate is reduced to a fraction of the euthermic metabolic rate. This reduction is commonly explained by temperature effects on biochemical reactions, as described by Q10 effects or Arrhenius plots. This study shows that the degree of metabolic suppression during hypothermia can alternatively be explained by active downregulation of metabolic rate and thermoregulatory control of heat production. Heat regulation is fully adequate to predict changes in metabolic rate, and Q10 effects are not required to explain the reduction of energy requirements during hibernation and torpor.
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Low 24-h minimum body temperatures presumably allowed pangolins to conserve energy by reducing metabolism, as explained by the Q10 effect in mammals.
“Low 24-h minimum body temperatures presumably allowed pangolins to conserve energy by reducing metabolism, as explained by the Q10 effect in mammals (Heldmaier and Ruf, 1992).”
From Temminck’s pangolins relax the precision of body temperature regulation when resources are scarce in a semi-arid environment (2023) · cites this paper as Heldmaier and Ruf, 1992
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- Authors
- Heldmaier, G., & Ruf, T.
- Affiliations
- Philipps University of Marburg (DE)
- ORCID
- Venue
- Journal of Comparative Physiology B
- Published
- 1992-12
- Volume
- 162
- Issue
- 8
- Pages
- 696-706
- ISSN
- 0174-1578 (ISSN-L)
- 1432-136X
- OpenAlex
- W2034325831
- Cited by
- 350
- References
- 0
- Citations by year
- 2026: 7 · 2025: 9 · 2024: 5 · 2023: 10 · 2022: 36 · 2021: 6 · 2020: 6 · 2019: 3 · 2018: 11 · 2017: 12 · 2016: 15 · 2015: 13 · 2014: 10 · 2013: 14 · 2012: 20
- FWCI
- 4.88
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Journal of Comparative Physiology B (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Environmental Science › Ecology › Physiological and biochemical adaptations
- Health Sciences › Medicine › Critical Care and Intensive Care Medicine › Thermal Regulation in Medicine
- Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Bat Biology and Ecology Studies
- Keywords
- hypothermia, metabolic rate, daily torpor, hibernation, endotherms, body temperature, thermoregulation, thermogenesis, Arrhenius plot, metabolic suppression, energy requirements
- MeSH terms
- Animals, Body Temperature Regulation, Circadian Rhythm, Cricetinae, Hibernation, Phodopus
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