Fig. 1

Effect of dietary copper level on SGR, liver Cu content, liver and serum Cu-Zn SOD activities of coho salmon (Oncorhynchus kisutch) fed the experimental diets for 10 weeks. (A) SGR; (B) Liver Cu content; (C) liver Cu-Zn SOD activities; (D) serum Cu-Zn SOD activities. The optimal dietary copper requirement were 5.41 mg/kg, 5.29 mg/kg, 5.92 mg/kg and 5.55 mg/kg, respectively. Each point represents the mean of three replicates.