Fig. 1. Carbonic anhydrase activity (A; µmol CO₂ mg protein^–1 min^–1) and mRNA expression (B; relative amounts) in anterior (G4, black bars) and posterior (G8, gray bars) of green crabs acclimated to 32 p.p.t. salinity vs eyestalk ablated crabs at 32 p.p.t. for 7 days. Values are means ± s.e.m. (N=6–8). T=12°C. Asterisks indicate statistical differences in G8 from the 32 p.p.t. controls