Basal metabolism is correlated with habitat productivity among populations of degus (<i>Octodon degus</i>)

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dc.contributor.authorBozinovic, Francisco
dc.contributor.authorRojas, Jose M.
dc.contributor.authorBroitman, Bernardo R.
dc.contributor.authorVasquez, Rodrigo A.
dc.date.accessioned2025-01-21T00:09:23Z
dc.date.available2025-01-21T00:09:23Z
dc.date.issued2009
dc.description.abstractSeveral competing hypotheses attempt to explain how environmental conditions affect mass-independent basal metabolic rate (BMR) in mammals. One of the most inclusive is the hypothesis that associates BMR with food habits, including habitat productivity. The effects of food habits have been widely investigated at the interspecific level, and variation between individuals and populations has been largely ignored. Intraspecific analysis of physiological traits has the potential to compensate for many pitfalls associated with interspecific analyses and serve as a useful approach for evaluating hypotheses regarding metabolic adaptation. Here we tested the effects of climatic variables (mean annual rainfall=PP, mean annual temperature=TA), net primary productivity (NPP) and the de Martonne index (DMi) of aridity on mass-independent BMR among four populations of the caviomorph rodent Octodon degus along a geographic gradient in Chile. BMR was measured on animals maintained in a common garden acclimation set-up, thus kept under the same environment and diet quality for at least 6 months. Mass-independent BMR was significantly different among degu populations showing a large intraspecific spread in metabolic rates. A very large fraction of interpopulational variability in mass-independent BMR was explained by NPR PP and DMi. Our results were conclusive about the effects of habitat productivity on setting the level of mass-independent BMR at the intraspecific-interpopulational level. (C) 2009 Elsevier Inc. All rights reserved.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.cbpa.2008.12.015
dc.identifier.eissn1531-4332
dc.identifier.issn1095-6433
dc.identifier.urihttps://doi.org/10.1016/j.cbpa.2008.12.015
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95706
dc.identifier.wosidWOS:000264511400014
dc.issue.numero4
dc.language.isoen
dc.pagina.final564
dc.pagina.inicio560
dc.revistaComparative biochemistry and physiology a-molecular & integrative physiology
dc.rightsacceso restringido
dc.subjectEnergetics
dc.subjectFood habit hypothesis
dc.subjectInterpopulational/Intraspecific physiological variability
dc.subjectOctodon degus (Rodentia, Octodontidae)
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.titleBasal metabolism is correlated with habitat productivity among populations of degus (<i>Octodon degus</i>)
dc.typeartículo
dc.volumen152
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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