After bred for 15 days,they were rand omized into 3 groups for anti fatigue experiment(n=15,swimming time),anti hypo xia ability(n=15) and determination of hemoglobin(n=10).

• 喂养15d后,分成3组进行抗疲劳实验(n=15,游泳时间),抗缺氧能力(n=15),血红蛋白的测定(n=10)。