Table 9.

SOD and CAT activities in the viscera of fish exposed to 5.5mg/L and 0.5 mg/L of CuSo₄.5H₂O and control at the end of every 24h exposure and 96h.

Concentration of Toxicant (mg/L)	Duration of Exposure (h)	Enzyme Assayed	Control X̄ ± SD (mg/g dry wt of Tissue)	Experiment X̄ ± SD (mg/g dry wt of Tissue)	% Change	Result
5.5 (n=5)	24	SOD	0.513 ± 0.08	0.48 ± 0.03	−6.43	P>0.05
	24	CAT	2.44 ± 0.10	1.65 ± 0.02	−32.78	P<0.05
	96	SOD	0.513 ± 0.08	0.201 ± 0.02	−60.83	P<0.001
	96	CAT	2.44 ± 0.10	0.693 ± 0.04	−71.57	P<0.001
± 0.55 (n=5)	24	SOD	0.175 ± 0.08	0.169 ± 0.001	−3.42	P>0.05
	24	CAT	0.329 ± 0.08	0.281 ± 0.008	−14.58	P<0.01
	96	SOD	0.175 ± 0.08	0.95 ± 0.007	−45.37	P<0.001
	96	CAT	0.329 ± 0.08	0.125 ± 0.010	−61.75	P<0.001