Fig. 1. Changes in the activity of antioxidant enzymes catalase (A), SOD (B) and GPx (C) in the lungs of the bearded dragon Pogona vitticeps during late development, at hatch and in the adult. Values are units mg^–1 protein and are means ± S.E.M. In all cases N=4–6, except in C, where ‘pip’ and ‘hatch’ data points are N=2 and N=1, respectively. Pairs of symbols (*, and ) indicate points that are significantly different from one another (P<0.05). In C, indicates that adult GPx activity is significantly higher than at any other stage of development.