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Body temperatures of quiescent Sator grandaevus in nature

abstract1 (full description below): Copeia 1968:622-623.
Body Temperatures.. PDF/Acrobat file     SoulĂ©, M.E.

Sator grandacvus, a sccloporine lizard endemic to Cerralvo Island in the Gulf of California, Mexico, seemi to have a characteristic thermal response during periods of peak environmental temperatures. Activity during the early afternoon is markedly diminished and search reveals individuals perched in the shade of bushes and trees. These apparently quiescent lizards have body temperatures approaching the ambient air temperatures and below those of active lizards. This putative response was noted during a study of Sator from 24 October to 9 November 1961 on Cerralvo Island. Compared to other sceloporine lizards, Sator occupies a great many habitats including sand dunes, thick vegetation, and rocky arroyos.