Abstract
-The thermal ecology of Sceloporus jarrovi was studied in the Chiricahua Mountains of southeastern Arizona at different elevations and times of year. Mean body temperature (Tb) was 31.8 C (range 6.6-38.8 C). Mean air temperature (Ta) was 20.6 C (range 5.0-36.2 C). The slope of the regression of Tb on Ta was 0.37. Winter Tbs were lower than summer Tbs. Low elevation lizards had higher Tbs than high elevation lizards. Males and females had similar Tbs. Pregnant females had lower Tbs than nonpregnant females. Pregnant females also had a lower slope for the Tb on Ta regression than nonpregnant females. Body temperatures of pregnant females at early stages of pregnancy (November) were not significantly different from pregnant females at late stages of pregnancy (May). Sceloporus jarrovi maintained lower Tbs than the sympatric lizard Sceloporus scalaris. These two species have different Tb on Ta regressions.
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