Fig. 5

Complex IV (Cytochrome c Oxidase) capacity. Panel a: permeabilised heart muscle fibres of Polar cod (B. saida). Panel b: permeabilised heart muscle fibres of NEAC (G. morhua). Different letters within the panels indicate significant differences (p <0.05) between temperature treatments; lower case letters: control PCO₂ (400μatm), upper case letters: high PCO₂ (1170μatm). All values are reported as means ± S.E.M. (for n refer to Table 1). Open symbols: control PCO₂ (400μatm), filled symbols: high PCO₂ (1170μatm). Circles: Polar cod, Squares: NEAC. Blue box: cold shared incubation temperature (3 °C), Red box: warm shared incubation temperature (8 °C) between the two species