NIH小鼠生长繁殖性能的观察

目的 在稳定的饲养环境条件下，观察NIH小鼠生长繁殖能力。方法 从生产大群中，随机抽取20笼，统计产仔数，计算其繁殖能力。其中10笼母鼠各带10只仔鼠，另10笼母鼠各带8只仔鼠。分别测试其出生重，1、2．3周龄体重增长比较，统计离乳成活率。结果 NIH小鼠平均产仔数为10．85，带8只仔鼠离乳时体重比带10只仔鼠体重每只重1．74g。离乳成活率也高出8．25％。结论 NIH小鼠繁殖能力强，生长繁育快，母鼠哺乳8只时更明显。

Observation of NIH Mice Growth and Fecundity

Objective To observe the growth and fecundity of NIH mice under a stable raising condition.Methods 20 cages of mice were randomized for the observation, that is ,10cages each comtained a seed mouse with eight young mice (group 1)and the other 10 cages, a seed mouse with ten (group 2).Results NIH mice produced 10.85 mice on average. The average weight of young mice was 1.74g more with higher survival rate of 8.25% in group 1 than group 2.Conclusion NIH mice showed strong fecundity and fast growth, especially when a seed mouse fed eight young mice.