Fig. 3

Effects of normoxia (white bars) and hypoxia (black bars) below the LOS on plasma parameters. Antioxidant activity (a), cortisol (b) and Igf-I (c). Data are presented as the mean ± SEM (n = 7–8). Statistically significant differences between normoxic and hypoxic fish are indicated (*P < 0.05, **P < 0.01; two-way analysis of variance (ANOVA) followed by the Holm-Sidak test)