Why bears hibernate? Redefining the scaling energetics of hibernation

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dc.contributor.authorNespolo, Roberto F.
dc.contributor.authorMejias, Carlos
dc.contributor.authorBozinovic, Francisco
dc.date.accessioned2025-01-20T21:07:17Z
dc.date.available2025-01-20T21:07:17Z
dc.date.issued2022
dc.description.abstractHibernation is a natural state of suspended animation that many mammals experience and has been interpreted as an adaptive strategy for saving energy. However, the actual amount of savings that hibernation represents, and particularly its dependence on body mass (the 'scaling') has not been calculated properly. Here, we estimated the scaling of daily energy expenditure of hibernation (DEEH), covering a range of five orders of magnitude in mass. We found that DEEH scales isometrically with mass, which means that a gram of hibernating bat has a similar metabolism to that of a gram of bear, 20 000 times larger. Given that metabolic rate of active animals scales allometrically, the point where these scaling curves intersect with DEEH represents the mass where energy savings by hibernation are zero. For BMR, these zero savings are attained for a relatively small bear (approx. 75 kg). Calculated on a per cell basis, the cellular metabolic power of hibernation was estimated to be 1.3 x 10(-12) +/- 2.6 x 10(-13) W cell(-1), which is lower than the minimum metabolism of isolated mammalian cells. This supports the idea of the existence of a minimum metabolism that permits cells to survive under a combination of cold and hypoxia.
dc.fuente.origenWOS
dc.identifier.doi10.1098/rspb.2022.0456
dc.identifier.eissn1471-2954
dc.identifier.issn0962-8452
dc.identifier.urihttps://doi.org/10.1098/rspb.2022.0456
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/93405
dc.identifier.wosidWOS:000793192300015
dc.issue.numero1973
dc.language.isoen
dc.revistaProceedings of the royal society b-biological sciences
dc.rightsacceso restringido
dc.subjecthibernation
dc.subjectdormancy
dc.subjectendothermy
dc.subjectmammals
dc.subjectallometry
dc.subjectmetabolism
dc.subject.ods15 Life on Land
dc.subject.ods13 Climate Action
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.subject.odspa13 Acción por el clima
dc.titleWhy bears hibernate? Redefining the scaling energetics of hibernation
dc.typeartículo
dc.volumen289
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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