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Figure 1


Fig. 1. Mass-specific O2 consumption rates in Pseudis paradoxus tadpoles and froglets measured at 25°C on exposure to water of variable O2 tension (mean of initial PO2 values) with free access to air. Each point represents the mean ± 1 s.e.m. of N>7 animals staged according to Cais after Gosner (Cais, 1982; Gosner, 1960) and measured individually. The data are pooled into groups of stages representing distinct developmental steps during the larval period. There is no significant effect of O2 tension on the rates; most variability is attributable to developmental stage (F=48.2, P<0.0001).





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