Fig. 2. Rates of oxygen consumption of trout hepatocytes after 30 min of incubation under isosmotic (control; 284 mosmol l^–1), hyposmotic (hypo; 166 mosmol l^–1) and hyperosmotic (hyper; 465 mosmol l^–1) conditions. Data are expressed as % of the mean of the control and are presented as means + S.E.M. of 12 (hyposmotic exposure) and 11 (hyperosmotic exposure) paired experiments. *P<0.05 compared with controls.