Abstract
We measured activity temperature range and resting metabolic rate in the lacertid lizards Lacerta vivipara (a cool temperate species) and Podarcis hispanica (warm temperate). Both species thermoregulate behaviorally over only a narrow range of body temperatures and have very similar activity temperature ranges. Resting metabolic rate of L. vivipara is significantly higher than that of P. hispanica over the temperature range 5-35 C. In addition, Ql, values for the resting metabolic rate of L. vivipara are lower than those for P. hispanica. We suggest these differences in the resting metabolic rate of the two species are related to the longer periods spent at low temperatures by L. vivipara.
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