The biochemical effects of TCS on the activity of SOD, CAT, POD,
and MDA in the viscera of A. fulica are depicted in Fig. 4. Compared
with the control, the SOD activity in the treatments above
14 mg kg1 was significantly induced with increasing TCS concentration
after a 14-d exposure (p < 0.05; ANOVA; Fig. 4A). The activity
of SOD in the treatments above 24 mg kg1 was significantly
enhanced after a 28-d exposure (p < 0.01; ANOVA; Fig. 4A).