EFFECT OF CADMIUM ON ANTIOXIDANT ENZYME ACTIVITIES OF THE JUVENILE Eniocheir sinensis

Immersing the juvenile crabs (Eniocheir sinensis) in 2.0 mg/ L CdCl2 water, antioxidant enzyme activities of hep-atopancrea were assayed at 6, 12, 24.48, 72 and 96 h.The results showed that the enzyme activities were all decreased at first. The activity of SOD was increased 22.3% compared with control group at 72 h ; The activity of CAT was increased at 48 h, then it was decreased again, at last it got the horizontality. The change of the activity of GPx was just the same as the SOD. It is concluded that the antioxidant enzyme activities of hepatopancrea were highly sensitive to Cd2 +. So they have indicating values for Cd water pollution in early stages.