Cost of living in free-ranging degus (<i>Octodon degus</i>)

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dc.contributor.authorBozinovic, F
dc.contributor.authorBacigalupe, LD
dc.contributor.authorVásquez, RA
dc.contributor.authorVisser, GH
dc.contributor.authorVeloso, C
dc.contributor.authorKenagy, GJ
dc.date.accessioned2025-01-21T01:08:16Z
dc.date.available2025-01-21T01:08:16Z
dc.date.issued2004
dc.description.abstractAnimals process and allocate energy at different seasons at variable rates, depending on their breeding season and changes in environmental conditions and resulting physiological demands. Overall total energy expenditure, in turn, should either increase in some seasons due to special added demands (e.g. reproduction) or it could simply remain at about the same level, in which case the animals must show compensatory rebalancing of other expenditures that can be reduced. To test for the alternative hypotheses of seasonal variability or compensation, we measured total daily energy expenditure (DEE) in free-living degus (Octodon degus) at four seasons and followed this with determinations of basal metabolic rate (BMR) in the laboratory in the same individuals. DEE varied seasonally but was only significantly different (lower) in summer (non-breeding season), with a DEE:BMR ratio of only 1.6, whereas autumn, winter and spring DEE values were statistically indistinguishable from one another and showed DEE:BMR ratios ranging from 1.9 to 2.2. Our values of DEE in the field fall within the broad range of allometric expectation for herbivorous mammals in general, but the ratios of DEE:BMR are lower than expected. This, together with the lack of strong major shifts in total levels of DEE, suggests that degus are showing compensatory shifts among various categories of energy expenditure that allow them to manage their overall energy balance by minimizing total expenditure. (C) 2003 Elsevier Inc. All rights reserved.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.cbpb.2003.11.014
dc.identifier.eissn1531-4332
dc.identifier.issn1095-6433
dc.identifier.urihttps://doi.org/10.1016/j.cbpb.2003.11.014
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96447
dc.identifier.wosidWOS:000220397600012
dc.issue.numero3
dc.language.isoen
dc.pagina.final604
dc.pagina.inicio597
dc.revistaComparative biochemistry and physiology a-molecular & integrative physiology
dc.rightsacceso restringido
dc.subjectfield energetics
dc.subjectmetabolism
dc.subjectactivity
dc.subjectseasonality
dc.subjectrodents
dc.subjectdegus
dc.subjectCentral Chile
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.titleCost of living in free-ranging degus (<i>Octodon degus</i>)
dc.typeartículo
dc.volumen137
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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