Fig. 1. V^·_O2 (mlkg^-1h^-1) at two temperatures for Chrysemys picta and Apalone ferox. Values represent means + S.E.M. For C. picta, N=11 at 25°C and all P_O2 values, N=4 at 15°C at normoxia, and N=5 at 15°C for hypoxia and hyperoxia. For A. ferox, N=9 at 25°C for normoxia and hypoxia and N=6 for hyperoxia; at 15°C, N=6 for normoxia and hypoxia, and N=5 for hyperoxia. Vertical columns represent mass-specific total ._O2. The shaded area represents the non-pulmonary contribution and the unshaded area represents the pulmonary contribution. See text for statistical analysis.

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