Fig. 6. Time course of changes in gill enzyme activities (glycogen phosphorylase, GPase; pyruvate kinase, PK; hexokinase, HK; and glucose 6-phosphate dehydrogenase, G6PDH) in gilthead sea bream acclimated to hyperosmotic (A) or hypo-osmotic (B) conditions. Fish were transferred for 14 days from seawater (SW) to (A) hypersaline water (HSW; closed circles) or (B) low salinity water (LSW; closed circles). Further details as in legend of Fig. 1. Note the different y-axis scales in A and B.