One group of fish was fed with food containing 40% Casein (H group);another group was fed with food containing 20% Casein (L group).

• 一组鱼喂含40%25酪蛋白的饵料（H组），一组鱼喂含20%25酪蛋白的饵料（L组），饵料的总能量相同；