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Thermal dependence of locomotor performance in two cool-temperate lizards

Citation

Gaby, MJ and Besson, AA and Bezzina, CN and Caldwell, AJ and Cosgrove, S and Cree, A and Haresnape, S and Hare, KM, Thermal dependence of locomotor performance in two cool-temperate lizards, Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology, 197, (9) pp. 869-875. ISSN 0340-7594 (2011) [Refereed Article]


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Copyright Statement

Copyright 2011 Springer-Verlag

Official URL: http://www.springerlink.com

DOI: doi:10.1007/s00359-011-0648-3

Abstract

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.

Item Details

Item Type:Refereed Article
Keywords:diel, Oligosoma, speed, squamate, Woodworthia, lizard, skink, gecko, locomotor performance, ectotherm, body temperature
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Behavioural Ecology
Objective Division:Environment
Objective Group:Ecosystem Assessment and Management
Objective Field:Ecosystem Assessment and Management at Regional or Larger Scales
Author:Caldwell, AJ (Mrs Mandy Caldwell)
ID Code:69903
Year Published:2011
Web of Science® Times Cited:11
Deposited By:Zoology
Deposited On:2011-05-24
Last Modified:2013-01-16
Downloads:0

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