marginally non-significantP = 0.074
The decline in aerobic scope was driven by a marginally non-significant decline of maximum oxygen consumption rates in the high and extreme high p CO 2 treatments (ANOVA, F 3 , 28 = 2.574, P = 0.074) and no significant difference in routine oxygen uptake rates (ANOVA, F 3 , 28 = 0.850, P = 0.479) across the p CO 2 treatments ( S4 Fig ).