
Fig. 1. Carbonic anhydrase specific activity in gills (A), intestine (B), kidney (C) and blood (D) of C. hamatus, T. bernacchii and A. anguilla. Values are expressed as means ± S.E.M. of 8 experiments. **P<0.01, *P<0.05 by ANOVA. aDifference between C. hamatus and T. bernacchii; bdifferences between C. hamatus and A. anguilla; cdifferences between T. bernacchii and A. anguilla.