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Figure 5


Fig. 5. 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. and transferred to 10 p.p.t. for 7 days. 32, 32 p.p.t. acclimated controls; 10 intact, intact crabs transferred to 10 p.p.t. for 7 days; 10 ESA, eyestalk ablated crabs transferred to 10 p.p.t. and assayed after 7 days; 10 ESAinj, eyestalk ablated crabs transferred to 10 p.p.t. and given daily injections of eyestalk extract taken from `donor' crabs acclimated to 32 p.p.t. Values are means ± s.e.m. (N=6–9). T=12°C. Different letters indicate statistical differences at P<0.05 in G8 across treatments.





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