Abstract
Torpor use differs among heterothermic species and data comparing populations of a single hibernating species at different latitudes could reveal how animals adapt to different climates. I investigated variables of torpor in free-ranging Nyctophilus bifax, a hibernating subtropical/tropical insectivorous microbat, during winter from a subtropical region and a tropical region. Mean torpor bout duration was significantly shorter and mean minimum skin temperature of torpid bats was significantly higher in the tropical population in comparison to the subtropical population. In both populations torpor bout duration was negatively correlated with ambient temperature and the slope of this relationship differed significantly (P = 0.02) between the populations when examined under the same thermal conditions. The differences found in these variables of torpor were most likely due to regional differences in weather and insect abundance and suggest that populations of heterothermic mammals can adapt or acclimatize to the local climate of the habitat that they occupy, even when thermal conditions are mild.
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References
Barclay RMR, Lausen CL, Hollis L (2001) What’s hot and what’s not: defining torpor in free-ranging birds and mammals. Can J Zool 79:1885–1890
Bartholomew GA (1982) Body temperature and energy metabolism. In: Gordon MS (ed) Animal physiology: principles and adaptations. MacMillian Publishing Co. Inc., New York, pp 333–406
Boyles JG, McKechnie AE (2010) Energy conservation in hibernating endotherms: Why “suboptimal” temperatures are optimal. Ecol Model 221:1644–1647
Boyles JG, Seebacher F, Smit B, McKechnie AE (2011) Adaptive thermoregulation in endotherms may alter responses to climate change. Integr Comp Biol 51:676–690
Brack V Jr (2007) Temperatures and locations used by hibernating bats, including Myotis sodalis (Indiana bat), in a limestone mine: implications for conservation and management. Environ Manage 40:739–746
Chruszcz BJ, Barclay RMR (2002) Thermoregulatory ecology of a solitary bat, Myotis evotis, roosting in rock crevices. Funct Ecol 16:18–26
Cory Toussaint D, McKechnie AE, van der Merwe M (2010) Heterothermy in free-ranging male Egyptian free-tailed bats (Tadarida aegyptiaca) in a subtropical climate. Mamm Biol 75:466–470
Dunbar MB, Brigham RM (2010) Thermoregulatory variation among populations of bats along a latitudinal gradient. J Comp Physiol B 180:885–893
Fenn AM, Zervanos SM, Florant GL (2009) Energetic relationships between field and laboratory woodchucks (Marmota monax) along a latitudinal gradient. Ethol Ecol Evol 21:299–315
French AR (1985) Allometries of the durations 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 156:13–19
Geiser F (2004) Metabolic rate and body temperature reduction during hibernation and daily torpor. Annu Rev Physiol 66:239–274
Geiser F (2006) Energetics, thermal biology, and torpor in Australian Bats. In: Zubaid A, McCracken GF, Kunz TH (eds) Functional and evolutionary ecology of bats. Oxford University Press, New York, pp 5–22
Geiser F, Brigham RM (2000) Torpor, thermal biology, and energetics in Australian long-eared bats (Nyctophilus). J Comp Physiol B 170:153–163
Geiser F, Ferguson C (2001) Intraspecific differences in behaviour and physiology: effects of captive breeding on patterns of torpor in feathertail gliders. J Comp Physiol B 171:569–576
Geiser F, Kenagy GJ (1988) Torpor duration in relation to temperature and metabolism in hibernating ground squirrels. Physiol Zool 61:442–449
Geiser F, Körtner G (2010) Hibernation and daily torpor in Australian mammals. Aust Zool 35:204–215
Geiser F, Mzilikazi N (2011) Does torpor of elephant shrews differ from that of other heterothermic mammals? J Mammal 92:452–459
Geiser F, Stawski C (2011) Hibernation and torpor in tropical and subtropical bats in relation to energetics, extinctions, and the evolution of endothermy. Integr Comp Biol 51:337–348
Hall M (1832) On hybernation. Philos T Roy Soc Lond 122:335–360
Hock RJ (1951) The metabolic rates and body temperatures of bats. Biol Bull 101:289–299
Körtner G, Geiser F (2000) Torpor and activity patterns in free-ranging sugar gliders Petaurus breviceps (Marsupialia). Oecologia 123:350–357
Park KJ, Jones G, Ransome RD (2000) Torpor, arousal and activity of hibernating greater horseshoe bats (Rhinolophus ferrumequinum). Funct Ecol 14:580–588
Rambaldini DA, Brigham RM (2008) Torpor use by free-ranging pallid bats (Antrozous pallidus) at the northern extent of their range. J Mammal 89:933–941
Ransome RD (1971) The effect of ambient temperature on the arousal frequency of the hibernating greater horseshoe bat, Rhinolophus ferrumequinum, in relation to site selection and the hibernation state. J Zool 164:353–371
Speakman JR, Thomas DW (2003) Physiological ecology and energetics of bats. In: Kunz TH, Fenton MB (eds) Bat Ecology. University of Chicago Press, Chicago, pp 430–492
Stawski C (2010) Ecology and thermal physiology of an insectivorous bat restricted to subtropical and tropical Australia. Dissertation, University of New England
Stawski C, Geiser F (2010) Seasonality of torpor patterns and physiological variables of a free-ranging subtropical bat. J Exp Biol 213:393–399
Stawski C, Geiser F (2011) Do season and distribution affect thermal energetics of a hibernating bat endemic to the tropics and subtropics? Am J Physiol 301:R542–R547
Stawski C, Turbill C, Geiser F (2008) Prolonged torpor use during winter by a free-ranging bat in subtropical Australia. In: Lovegrove BG, McKechnie AE (eds) Hypometabolism in animals: hibernation, torpor and cryobiology. University of KwaZulu-Natal, Pietermaritzburg, pp 353–360
Stawski C, Turbill C, Geiser F (2009) Hibernation by a free-ranging subtropical bat (Nyctophilus bifax). J Comp Physiol B 179:433–441
Turbill C, Geiser F (2008) Hibernation by tree-roosting bats. J Comp Physiol B 178:597–605
Zervanos SM, Maher CR, Waldvogel JA, Florant GL (2010) Latitudinal differences in the hibernation characteristics of woodchucks (Marmota monax). Physiol Biochem Zool 83:135–141
Acknowledgments
I thank Fritz Geiser for help and for constructive comments on the manuscript. For their help with this project I would also like to thank Alexander Foster, Gerhard Körtner, Anaïs LeBot, Alexander Riek, Margaret and Mike Stawski, and Christopher Turbill. This project was funded by an Australian Postgraduate Award, Bat Conservation International, Jagiellonian University, and the University of New England.
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Stawski, C. (2012). Comparison of Variables of Torpor Between Populations of a Hibernating Subtropical/Tropical Bat at Different Latitudes. In: Ruf, T., Bieber, C., Arnold, W., Millesi, E. (eds) Living in a Seasonal World. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-28678-0_9
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DOI: https://doi.org/10.1007/978-3-642-28678-0_9
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