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This study was explored the supplementary of vitamin E on reproduction of tilapia. Five vitamin E supplements (0, 40, 80, 120 and 160 mg/kg) were tested for 90 days. Results: The SGR, GSI and ovarian maturity of female were the highest at Group 120 mg/kg, and the FCR was the lowest. The SGR, GSI and testis maturity of male were the highest at Group 160 mg/kg, and the FCR was the lowest. The levels...