Heritability of energetics in a wild mammal, the leaf-eared mouse (<i>Phyllotis darwini</i>)

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dc.contributor.authorNespolo, RF
dc.contributor.authorBacigalupe, LD
dc.contributor.authorBozinovic, F
dc.date.accessioned2025-01-21T01:09:17Z
dc.date.available2025-01-21T01:09:17Z
dc.date.issued2003
dc.description.abstractAs a first examination of the additive genetic variance of thermoregulatory traits in a natural population of endotherms. we studied the quantitative genetics of key physiological ecology traits in the leaf-cared mouse, Phyllotis darwini. We measured basal metabolic rate (BMR), nonshivering thermogenesis (NST), maximum metabolic rate for thermoregulation (MMR), thermal conductance (C-T), body temperature (T-b), and factorial aerobic scope (FAS) in individuals acclimated to cold and warm conditions. For comparability with previous studies, we included the following morphological traits: foot length (F-L), total length (T-L), body mass (m(b), at birth, sexual maturity, 6 months, and 8 months). Variance components were obtained from two different procedures: the expected variance component in an ANOVA Type III sum of squares and an animal model approach using restricted maximum likelihood. Results suggest the presence of additive genetic variance in F-L (h(2) = 0.47, P = 0.045), C-T of cold-acclimated animals (h(2) = 0.66, P = 0.041). and night body temperature, measured in cold-acclimated animals (h(2) = 0.68, P = 0.080). Heritabilities of rub were near zero at all ages, but maternal effects and common environment effects were high and significant. We found no evidence of additive genetic variance in BMR, NST, MMR, or FAS (i.e., estimates were not significantly different from zero for all tests). Our results are in general agreement with previous studies of mammals that reported low heritability for: (1) BMR and MMR; (2) daytime body temperature; and (3) body mass for wild, but not laboratory or domestic, populations.
dc.fuente.origenWOS
dc.identifier.eissn1558-5646
dc.identifier.issn0014-3820
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96565
dc.identifier.wosidWOS:000184589300020
dc.issue.numero7
dc.language.isoen
dc.pagina.final1688
dc.pagina.inicio1679
dc.revistaEvolution
dc.rightsacceso restringido
dc.subjectendothermy
dc.subjectheritability
dc.subjectmammals
dc.subjectmetabolic rate
dc.subjectPhyllotis
dc.subjectthermal conductance
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.titleHeritability of energetics in a wild mammal, the leaf-eared mouse (<i>Phyllotis darwini</i>)
dc.typeartículo
dc.volumen57
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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