University Of Tasmania

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Thermal dependence of locomotor performance in two cool-temperate lizards

journal contribution
posted on 2023-05-17, 06:14 authored by Gaby, MJ, Besson, AA, Bezzina, CN, Caldwell, AJ, Cosgrove, S, Cree, A, Haresnape, S, Hare, KM
Temperate-zone ectotherms experience varying or very low ambient temperatures and may have difficulty in attaining preferred body temperatures. Thus, adaptations to reduce the thermal dependence of physiological processes may be present. We measured the optimal temperature range for sprint speed and compared it with the selected body temperatures (Tsel) of two sympatric, cool-temperate lizards: the diurnal skink Oligosoma maccanni and the primarily nocturnal gecko Woodworthia (previously Hoplodactylus) ‘‘Otago/Southland’’. We also investigated whether time-of-day influenced sprint speed. Contrary to results for other reptiles, we found that time-of- day did not influence speed in either species. For each species, the optimal temperature range for sprinting and Tsel overlapped, supporting the ‘thermal coadaptation’ hypothesis. However, the optimal range of temperatures for speed is not always attainable during activity by either species, which have limited opportunities to attain Tsel in the field. The thermal sensitivity of sprint speed in these two species does not appear to have evolved to fully match their current thermal environment. More data on cold- adapted species are needed to fully understand physiological adaptation in ectotherms.


Publication title

Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology










School of Natural Sciences



Place of publication

175 Fifth Ave, New York, USA, Ny, 10010

Rights statement

Copyright 2011 Springer-Verlag

Repository Status

  • Restricted

Socio-economic Objectives

Assessment and management of Antarctic and Southern Ocean ecosystems