Energetics thermoreoulation and torpor in the Chilean mouse-opossum <i>Thylamys elegans</i> (Didelphidae)

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dc.contributor.authorBozinovic, F
dc.contributor.authorRuiz, G
dc.contributor.authorCortés, A
dc.contributor.authorRosenmann, M
dc.date.accessioned2025-01-21T01:06:55Z
dc.date.available2025-01-21T01:06:55Z
dc.date.issued2005
dc.description.abstractIn this paper we Studied the energetics and thermoregulation of the Chilean mouse-opossum Thylamys elegans (Dielphidae) a nocturnal small marsupial, endemic Of Southern South America. We Studied their standard energetic and determined whether they exhibit shallow daily torpor or deep prolonged torpor as a function of ambient temperature and food availability. Thylamys elegans partially supports the hypothesis that Neotropical marsupials have somewhat a higher basal metabolic rate (BMR) and thermal conductance (C-m) than Australian Ones. In fact, BMR was higher but C-m was lower than expected for their body mass, The higher mass-independent BMR of the Chilean mouse-opossum may be explained by its insectivorous food habits and its low C-m by its temperate habitats. Euthermic Chilean mouse-opossum showed daily fluctuations in body temperature being significantly hi-her during night time. In addition T. elegans entered in daily torpor and aroused spontaneously only was food was absent. That is, this species display a facultative type of daily torpor because propensity to enter in torpor was dependent of the combination of food absence and low ambient temperature. No torpor was observed when food was available. During torpor ambient temperature was slightly above ambient temperature between 0.3 to 0.5 degrees C. Torpor in this species as well as in marsupials in general. appears to be a flexible and an opportunistic response to unpredictable environmental conditions.
dc.fuente.origenWOS
dc.identifier.eissn0717-6317
dc.identifier.issn0716-078X
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96245
dc.identifier.wosidWOS:000230118200003
dc.issue.numero2
dc.language.isoen
dc.pagina.final206
dc.pagina.inicio199
dc.revistaRevista chilena de historia natural
dc.rightsacceso restringido
dc.subjectSouth America
dc.subjectChile
dc.subjectmarsupials
dc.subjectenergetic
dc.subjectthermoregulation
dc.subjectfacultative torpor
dc.subject.ods13 Climate Action
dc.subject.ods15 Life on Land
dc.subject.odspa13 Acción por el clima
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titleEnergetics thermoreoulation and torpor in the Chilean mouse-opossum <i>Thylamys elegans</i> (Didelphidae)
dc.typeartículo
dc.volumen78
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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