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Figure 2


Fig. 2. Carbonic anhydrase activity (µmol CO2 mg protein–1 min–1) in anterior (G4, black bars) and posterior (G8, gray bars) gills of green crabs acclimated to 32 p.p.t. 32, 32 p.p.t. acclimated controls; Sham, intact crabs injected daily with filtered seawater for 7 days; ESA, eyestalk ablated crabs assayed after 7 days; ESA-inj, eyestalk ablated crabs injected daily with eyestalk extract and assayed after 7 days. Values are means ± s.e.m. (N=6–10). T=12°C. Asterisks indicate statistical differences at P<0.05 in G4 and G8 vs the corresponding gill in the 32 p.p.t. controls.