Fig. 2. White muscle PCr (A) and pH_i (B) following exercise (white bars) and exposure to hypoxia (striped bars) in carp acclimated to 15 or 25°C. Phosphocreatine levels are normalized to the sum of PCr and P_i, and expressed relative to normoxic/resting controls. NMR data were collected at the fishes' acclimation temperature. Each bar represents mean + s.e.m. Significant differences (P<0.05) between exercise and hypoxia at a given temperature are indicated by + (two-way ANOVA). From left to right in each panel, N=7, 7, 10 and 6.