Figure 1.

CO₂ avoidance in Atlantic cod after long-term exposure to control water or high pCO₂ water. Mean time (%) that juvenile Gadus morhua spent in the control water (550 μatm CO₂) when presented with the choice of control water or high pCO₂ water (1170 μatm CO₂); n_control = 19 and n_CO2 = 12. Fish from both acclimation groups were tested: the control fish and the long-term CO₂-exposed fish. Both treatment groups displayed equally strong avoidance (p = 0.0001). The data represent the mean ± SEM.