, Volume 94, Issue 11, pp 941–944 | Cite as

Yearlong hibernation in a marsupial mammal

  • Fritz GeiserEmail author
Short Communication


Many mammals hibernate each year for about 6 months in autumn and winter and reproduce during spring and summer when they are generally not in torpor. I tested the hypothesis that the marsupial pygmy-possum (Cercartetus nanus), an opportunistic nonseasonal hibernator with a capacity for substantial fattening, would continue to hibernate well beyond winter. I also quantified how long they were able to hibernate without access to food before their body fat stores were depleted. Pygmy-possums exhibited a prolonged hibernation season lasting on average for 310 days. The longest hibernation season in one individual lasted for 367 days. For much of this time, despite periodic arousals after torpor bouts of ∼12.5 days, energy expenditure was reduced to only ∼2.5% of that predicted for active individuals. These observations represent the first report on body-fat-fuelled hibernation of up to an entire year and provide new evidence that prolonged hibernation is not restricted to placental mammals living in the cold.


Australian mammal Energy expenditure Fat storage Prolonged hibernation Unpredictable climate 



I would like to thank Nereda Christian, Rebecca Drury, and Wendy Westman for technical assistance as well as Bronwyn McAllan, Gerhard Körtner, and Chris Pavey for constructive comments on the manuscript. The Australian Research Council supported this work. Permits were provided by the New South Wales National Parks and Wildlife Service and the University of New England Animal Ethics Committee.


  1. Arendt T, Stieler J, Strijkstra AM, Hut RA, Rüdiger J, Van der Zee EA, Harkany T, Holzer M, Härtig W (2003) Reversible paired helical filament-like phosphorylation of tau is an adaptive process associated with neuronal plasticity in hibernating animals. J Neurosci 23:6972–6981PubMedGoogle Scholar
  2. Arnold W (1993) Energetics of social hibernation. In: Carey C, Florant GL, Wunder BA, Horwitz B (eds) Life in the cold: ecological, physiological and molecular mechanisms. Westview, Boulder, CO, pp 65–80Google Scholar
  3. Bladon RV, Dickman CR, Hume ID (2002) Effects of habitat fragmentation on the demography, movements and social organisation of the eastern pygmy-possum (Cercartetus nanus) in northern New South Wales. Wildl Res 29:105–116CrossRefGoogle Scholar
  4. Boyer BB, Barnes BM (1999) Molecular and metabolic aspects of mammalian hibernation. Bioscience 49:713–724CrossRefGoogle Scholar
  5. Buck CL, Barnes BM (2000) Effects of ambient temperature on metabolic rate, respiratory quotient, and torpor in an arctic hibernator. Am J Physiol 279:R255–R262Google Scholar
  6. Carey HV, Andrews MT, Martin SL (2003) Mammalian hibernation: cellular and molecular responses to depressed metabolism and low temperature. Physiol Rev 83:1153–1181PubMedGoogle Scholar
  7. Dausmann KH, Glos J, Ganzhorn JU, Heldmaier G (2005) Hibernation in the tropics: lessons from a primate. J Comp Physiol B 175:147–155PubMedCrossRefGoogle Scholar
  8. Degen AA, Kam M (1995) Scaling of field metabolic rate to basal metabolic rate in homeotherms. Ecoscience 2:48–54Google Scholar
  9. Fisher KC, Manery JF (1967) Water and electrolyte metabolism in heterotherms. In:Fisher KC, Dawe AR, Lyman CP, Schönbaum E, South FE (eds) Mammalian hibernation III. Oliver and Boyd, Edinburgh, pp 235–279Google Scholar
  10. French AR (1985) Allometries of the duration of torpid and euthermic intervals during mammalian hibernation: a test of the theory of metabolic control of the timing of changes in body temperature. J Comp Physiol B 156:13–19PubMedCrossRefGoogle Scholar
  11. Florant GL (1998) Lipid metabolism in hibernators: the importance of essential fatty acids. Am Zool 38:331–340Google Scholar
  12. Geiser F (1993) Hibernation in the eastern pygmy possum, Cercartetus nanus (Marsupialia: Burramyidae). Aust J Zool 41:67–75CrossRefGoogle Scholar
  13. Geiser F (2004) Metabolic rate and body temperature reduction during hibernation and daily torpor. Annu Rev Physiol 66:239–274PubMedCrossRefGoogle Scholar
  14. Geiser F, Kenagy GJ (1988) Duration of torpor bouts in relation to temperature and energy metabolism in hibernating ground squirrels. Physiol Zool 61:442–449Google Scholar
  15. Geiser F, Hiebert SM, Kenagy GJ (1990) Torpor bout duration during the hibernation season of two sciurid rodents: interrelations with temperature and metabolism. Physiol Zool 63:489–503Google Scholar
  16. Körtner G, Geiser F (1995) Effect of photoperiod and ambient temperature on activity patterns and body weight cycles of mountain pygmy-possums, Burramys parvus (Marsupialia). J Zool (London) 235:311–322Google Scholar
  17. Körtner G, Geiser F (1998) Ecology of natural hibernation in the marsupial mountain pygmy-possum (Burramys parvus). Oecologia 113:170–178CrossRefGoogle Scholar
  18. Körtner G, Geiser F (2000) The temporal organization of daily torpor and hibernation: circadian and circannual rhythms. Chronobiol Int 17:103–128PubMedCrossRefGoogle Scholar
  19. Millesi E, Prossinger H, Dittami JP, Fieder M (2001) Hibernation effects on memory in European ground squirrels. J Biol Rhythms 16:264–271PubMedCrossRefGoogle Scholar
  20. Nicol SC, Andersen NA (2007) Rewarming rates and thermogenesis in hibernating echidnas. Comp Biochem Physiol A Mol Integr Physiol (in press)Google Scholar
  21. Schmidt-Nielsen K (1997) Animal physiology. Cambridge University Press, Cambridge, MAGoogle Scholar
  22. Song X, Körtner G, Geiser F (1997) Thermal relations of metabolic rate reduction in a hibernating marsupial. Am J Physiol 273:R2097–R2104PubMedGoogle Scholar
  23. Strahan R (1983) Pygmy possums and feathertail glider. In: Strahan R (ed) Complete book of Australian mammals. Angus and Robertson, Sydney, p 158Google Scholar
  24. Thomas DW, Geiser F (1997) Periodic arousal in hibernating mammals: is evaporative water loss involved? Funct Ecol 11:585–591CrossRefGoogle Scholar
  25. Thomas DW, Dorais M, Bergeron J-M (1990) Winter energy budgets and cost of arousal for hibernating little brown bats, Myotis lucifugus. J Mammal 71:475–479CrossRefGoogle Scholar
  26. Turbill C, Körtner G, Geiser F (2003) Natural use of torpor by a small, tree-roosting bat during summer. Physiol Biochem Zool 76:868–876PubMedCrossRefGoogle Scholar
  27. Wang LCH (1978) Energetics and field aspects of mammalian torpor: the Richardson’s ground squirrel. In: Wang LCH, Hudson JW (eds) Strategies in cold. Academic, New York, pp 109–145Google Scholar
  28. Willis JS (1982a) The mystery of periodic arousal. In: Lyman CP, Willis JS, Malan A, Wang LCH (eds) Hibernation and torpor in mammals and birds. Academic, New York, pp 92–103Google Scholar
  29. Willis JS (1982b) Intermediary metabolism in hibernation. In: Lyman CP, Willis JS, Malan A, Wang LCH (eds) Hibernation and torpor in mammals and birds. Academic, New York, pp 124–139Google Scholar
  30. Willis CKR, Brigham RM, Geiser F (2006) Deep, prolonged torpor by pregnant, free-ranging bats. Naturwissenschaften 93:80–83PubMedCrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  1. 1.Centre for Behavioural and Physiological Ecology, ZoologyUniversity of New EnglandArmidaleAustralia

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