Fig. 5.

a–d Net O₂ demand of cod gill Na⁺/K⁺-ATPase (a), H⁺-ATPase (b), HCO₃ ⁻-transporter (c) and Na⁺/H⁺-exchanger (d) (µmol O₂ × gFW⁻¹ × h⁻¹) of cod 4 weeks exposed to low PCO₂ = 550 µatm (L), medium PCO₂ = 1200 µatm (M) and high PCO₂ = 2200 µatm (H) at 10 °C (grey circles) and at 18 °C (black circles), given as means with standard error of the mean. Letters indicate significant differences in net O₂ demand of processes between treatment groups (p < 0.05), n = 10 per treatment