PMID: 9634177Jun 20, 1998Paper

Daily and seasonal rhythms in selected body temperatures in the Australian lizard Tiliqua rugosa (Scincidae): field and laboratory observations

Physiological Zoology
Bruce T Firth, Ingrid Belan

Abstract

This study examined daily and seasonal activity and thermoregulatory behaviour of the sleepy lizard, Tiliqua rugosa, a large, diurnally active temperate-dwelling Australian lizard, in the field and laboratory. Activity temperatures in the field were compared with those selected by lizards in laboratory thermal gradients in order to assess the extent to which endogenous versus exogenous factors contribute to seasonal variations in thermoregulatory behaviour. In the field, lizards are most active in late winter-spring (August-November), during which their activity varies from mostly unimodal on days of mild temperature to bimodal on hot days. In late spring-summer (November-January), activity is largely restricted to early morning, and at all other seasons sleepy lizards are rarely active. The winter-spring activity of sleepy lizards is constrained by low environmental temperatures, as lizards at these seasons have low body temperatures in the field but higher temperatures in laboratory thermal gradients. The lower temperatures selected in the laboratory in the summer-autumn months suggest the avoidance of high ambient temperatures and general inactivity in the field at these times. Thermal selection in the laboratory at the eigh...Continue Reading

Citations

Jul 30, 2008·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·David J EllisIngrid Belan
Aug 31, 2010·Behavioral Ecology and Sociobiology·Stephan T LeuC Michael Bull
Aug 31, 2013·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Susana Clusella-Trullas, Steven L Chown
Aug 13, 2015·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Colin E SandersWilliam K Milsom
Apr 26, 2007·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·David J EllisIngrid Belan
Apr 9, 2011·Behavioral Ecology and Sociobiology·Stephan T LeuC Michael Bull
Jul 22, 2005·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Frank Seebacher
Jun 21, 2015·Applied and Environmental Microbiology·Sandra K ParsonsDavid M Gordon
Mar 3, 2021·Conservation Physiology·Kathleen N IveyEmily Taylor

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