Under semi-intensive culture condition, the activities of pepsin, tryptase and amylase of re-feed shrimp changed like above feeding frequency and feeding rate.

• 半精养模式中，经饥饿再投喂后仔虾的胃蛋白酶、类胰蛋白酶和淀粉酶活力均随饥俄天数的增加呈现先上升后下降的趋势；