Fig. 5. Specific activity of the Na+/K+-ATPase in homogenates
obtained from gills perfused with isosmotic (Isosucrose) or with
Hyposmotic saline. Isosucrose: 1045 mosmol l-1;
Hyposmotic: 698.6 mosmol l-1. Mean ± S.E.M. of five values
are given in each column. Asterisk indicates statistical difference
(P<0.05).