Energetics and torpor of a South American "living fossil", the microbiotheriid <i>Dromiciops gliroides</i>

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dc.contributor.authorBozinovic, F
dc.contributor.authorRuiz, G
dc.contributor.authorRosenmann, M
dc.date.accessioned2025-01-21T01:08:06Z
dc.date.available2025-01-21T01:08:06Z
dc.date.issued2004
dc.description.abstractWe examined the energetics of the living fossil microbiotheriid Dromiciops gliroides, a nocturnal and rare small marsupial, endemic to the northern portion of the temperate forest of southern South America. We investigated the effects of changes at ambient temperature and food restriction on the energetics and patterns of torpor. We determined whether they exhibit shallow daily torpor or deep prolonged torpor like some Australian marsupials. Thermal conductance was 92.5% of the expected value for a similarly sized eutherian and basal metabolic rate was 82.9 and 58.6% of the predicted value for standard metatherians and eutherians, respectively. Euthermic D. gliroides showed daily fluctuations in body temperature, being significantly higher during the night. Dromiciops gliroides entered torpor and aroused spontaneously. The duration of torpor bouts increased in response to decreasing ambient temperature; torpor bout duration ranged from 10 h at 20degreesC to 120 h at 12.5degreesC. This study is the first record of deep torpor or hibernation for a South American mammal. Torpor in this species as well as in marsupials in general appears to be an opportunistic response to unpredictable biotic and abiotic conditions.
dc.fuente.origenWOS
dc.identifier.doi10.1007/s00360-004-0414-8
dc.identifier.eissn1432-136X
dc.identifier.issn0174-1578
dc.identifier.urihttps://doi.org/10.1007/s00360-004-0414-8
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96426
dc.identifier.wosidWOS:000221191800002
dc.issue.numero4
dc.language.isoen
dc.pagina.final297
dc.pagina.inicio293
dc.revistaJournal of comparative physiology b-biochemical systems and environmental physiology
dc.rightsacceso restringido
dc.subjectSouth America
dc.subjectmarsupials
dc.subjectenergetics
dc.subjectthermoregulation
dc.subjecttorpor
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.titleEnergetics and torpor of a South American "living fossil", the microbiotheriid <i>Dromiciops gliroides</i>
dc.typeartículo
dc.volumen174
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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