Abstract:

In order to study the effects of starvation stress on the antioxidant ability of tilapia that had been fed with Sophora flavonoids (SF), 400 fish were divided into 5 groups with 4 replicates in each group. Tilapia with average weight of (11.52±2.85) g per tail, were exposed to dietary SF at concentrations of 0, 200, 400, 800 and 1600 mg/kg for 7 weeks, then were starved for 1 d, 8 d, 15 d to measure the content of malonaldehyde (MDA), the total antioxidation capacity (T-AOC), and the activity of superoxide dismutase (SOD) and catalase (CAT) of the tilapia’s hepatopancreas. The results showed that 200 to 1600 mg/kg dietary SF significantly decreased the content of the MDA and the activity of CAT of the experimental groups (P＜0.01), and significantly increased the level of the T-AOC (P＜0.01) and the activity of the SOD (P＜0.05)of the experimental group. The antioxidant ability of tilapia increased with the increase of the level of dietary SF, and the group fed with 1600 mg/kg SF was the best. The results indicated that the ability of the oxidation resistance under starvation stress could be enhanced by adding SF in feed of tilapia.