Fig. 2

State IV^* of permeabilised heart muscle fibres of (a) Polar cod (B. saida) and (b) NEAC (G. morhua). Different letters within panels indicate significant differences (p <0.05) between temperature treatments; lower case letters: control PCO₂ (400μatm), upper case letters: high PCO₂ (1170μatm), * indicates significant differences (p <0.05) between CO₂ groups at the same temperature. 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