Abstract
1. 1.|Capacity for thermal acclimation of oxidative metabolism was examined in five species of tropical anurans. Animals were acclimated at 20 or 30°C, and their routine rates of oxygen consumption determined at 20 and 30°C. 2. 2.|Acclimation had little effect on oxygen consumption in four of five species; by contrast, Rana erythrae showed significant inverse acclimation of metabolism and a remarkably high temperature coefficient (Q 10) of metabolism. 3. 3.|Prolonged acclimation (27 days) did not affect oxygen consumption of Bufo marinus. 4. 4.|Of 29 species of amphibians examined to date (7 tropical, 22 temperature zone), all temperate-zone species show significant acclimation of metabolism; all but one tropical species show no acclimation.
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