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Figure 8


Fig. 8. Carbonic anhydrase activity (µmol CO2 mg protein–1 min–1) in anterior (G4, black bars) and posterior (G8, gray bars) of green crabs acclimated to 32 p.p.t. and transferred to 10 p.p.t. for 4 days. 32, 32 p.p.t. acclimated controls; 10-4days, intact crabs assayed after 4 days at 10 p.p.t.; 10 inj1x, intact crabs given a once daily injection of eyestalk extract from `donor' crabs acclimated to 32 p.p.t.; 10 inj2x, intact crabs given twice-daily injections of eyestalk extract from `donor' crabs acclimated to 32 p.p.t. Values are means ± s.e.m. (N=6-7). T=12°C. Asterisk indicates statistical difference at the 0.05 level of significance in G4 from 32 p.p.t. control. Different letters indicate statistical differences at P<0.05 in G8 across treatments.





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