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Figure 1


Fig. 1. Representative trace of body temperature (Tb) and selected ambient temperature (Ta) of two different lizards (P. vitticeps) allowed to thermoregulate inside an electronic temperature-choice shuttle box. Traces are plotted for the 4.5 h acclimation period and the subsequent 7.5 h of exposure to (A) 21% O2 and (B) 5% O2. Arrow denotes the onset of hypoxia at 12:00 h. Arrowhead represents the moment at which 5% oxygen was reached (12:30 h).