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Effect of different antioxidants supplementation (g/kg diet) on changes of superoxide dismutase (SOD; (A)); catalase (CAT; (B)); glutathione-S-transferase (GST; (C)) and glutathione peroxidase (GSH-Px; (D)) activities as a percent of the control in testes homogenate of Nile tilapia, O. niloticus. GE, ginseng extract; TT, Tribulus terrestris extract; DPPG, date palm pollen grains. (n = 15) ns: non-significant, 0.05–0.001 indicates t-test significant levels of actual parameter values.
