Fig. 1. Effects of a laboratory simulation of summer and winter conditions on (A) oxygen consumption (_O2), (B) breathing frequency (fB), and (C) percent time spent active of captive juvenile green turtles. Filled bars represent simulated summer conditions (T_W=26°C, photoperiod 14 h:10 h light:dark) and open bars represent simulated winter conditions (T_W=17°C, photoperiod 10.25 h:13.75 h light:dark). Variables were measured during exposure to summer conditions before and after the winter simulation (26-pre and 26-post, respectively) and after 8 weeks and 16 weeks exposure to winter conditions (17-8w and 17-16w, respectively). There was no statistically significant difference in _O2 (P=0.059), fB (P=0.288) or percent time spent active (P=0.400) between treatment groups. N=5 for all treatment groups except 26-post, in which N=4.