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Figure 4


Fig. 4. 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. 32, 32 p.p.t. acclimated controls; 10 intact, intact crabs transferred to 10 p.p.t. for 7 days; 10 sham, intact crabs transferred to 10 p.p.t. and given daily injections of filtered seawater; 10 inj, intact 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. Asterisks indicate statistical differences in G4 vs 32 p.p.t. controls; different letters indicate statistical differences in G8 across treatments at P<0.05.





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