Opportunistic hibernation by a free-ranging marsupial

J. M. Turner, L. Warnecke, G. Körtner, F. Geiser

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Knowledge about the thermal biology of heterothermic marsupials in their native habitats is scarce. We aimed to examine torpor patterns in the free-ranging western pygmy-possum (Cercartetus concinnus), a small marsupial found in cool temperate and semi-arid habitat in southern Australia and known to express aseasonal hibernation in captivity. Temperature telemetry revealed that during two consecutive winters four out of seven animals in a habitat with Mediterranean climate used both short (<24h in duration) and prolonged (>24h) torpor bouts (duration 6.4 ± 5.4h and 89.7 ± 45.9h, respectively). Torpor patterns were highly flexible among individuals, but low ambient temperatures facilitated torpor. Maximum torpor bout duration was 186.0h and the minimum body temperature measured was 4.1°C. Individuals using short bouts entered torpor before sunrise at the end of the active phase, whereas those using prolonged torpor entered in the early evening after sunset. Rewarming from torpor usually occurred shortly after midday, when daily ambient temperature increased. We present the first quantitative data on a marsupial species expressing opportunistic hibernation during winter in the wild, and show that torpor use in C.concinnus is strongly influenced by small-scale microclimatic conditions.

Original languageEnglish
Pages (from-to)277-284
Number of pages8
JournalJournal of Zoology
Volume286
Issue number4
DOIs
Publication statusPublished - 01 Apr 2012

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torpor
hibernation
resting periods
marsupial
Metatheria
ambient temperature
habitat
habitats
duration
winter
temperature
body temperature
captivity
telemetry
Mediterranean climate
heat
Biological Sciences

Cite this

Turner, J. M. ; Warnecke, L. ; Körtner, G. ; Geiser, F. / Opportunistic hibernation by a free-ranging marsupial. In: Journal of Zoology. 2012 ; Vol. 286, No. 4. pp. 277-284.
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Opportunistic hibernation by a free-ranging marsupial. / Turner, J. M.; Warnecke, L.; Körtner, G.; Geiser, F.

In: Journal of Zoology, Vol. 286, No. 4, 01.04.2012, p. 277-284.

Research output: Contribution to journalArticle

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