麝鼠配种期胎次对繁殖力的影响

the Effect of Service Period and Foetus Frequency on Capacity in Muskrat

1984～1989年进行了麝鼠家养繁殖观察,1990年做了较为系统的观察和分析,认为东北地区家养麝鼠的繁殖呈年周期变化,配种期在4～8月;5月下旬胎平均产仔6.067±1.751只显著地高于7月下旬4.111±1.616只(P<0.05);6月20日前产出的仔鼠成活率97.33±14.817％极显著地高于7月产出的79.36±39.35％(P<0.001);第一胎的仔鼠成活率94.2％极显著地高于第二胎73.1％(P<0.001)。为探讨其繁殖特点提供了科学依据。

The reproduction of domestic muskrats was observed from 1984 to 1989, and systematically observed and analysed in 1990. we considered that the reproductioe of domestic Muskrats varied with an annual cycle in northeast area, and its service period was from April to August.The average little size of rats calving in the last 10 days of may (6.067±1.751) was higher (P<0.05)than that in the last 10 days of July(4.111±1.616) The survival ratio of the young rats which were born before June 6(97.33±14.817%) was higher (P<0.001)than that in July(79.36±39.35%). The survival ratio of the young rats of the first foetus (94.2%). was higher(P<0.001) than that of the second foetus(73.1%), The paper provide scientific basis for researching the reproductive characteristic of muskrats.