高山姬鼠种群的繁殖特征

摘要

The reproduction of population of Apodemus chevieri in Dafang county of Guizhou province was investigated during 1996～1998. A to ta1 of 520 specimens were collected and dissected,among which 264 were female a nd 256 male.In main propagating season,the mean pregnancy rate,litter size and reproductive index were 18.62%,6.03 and 0.6846，respectively.The fluctuations of the rate of testis in serotum were identical with the rate of female pregnan cy.%报道了1996～1998年贵州大方县高山姬鼠的种群繁殖特征。共解剖标本520只，雌鼠264只，雄鼠256只。主要繁殖期在4～9月，研究期间平均怀孕率为18.62%，平均胎仔数为6.03只，繁殖指数0.6846，每年4～5月和8～9月为两次妊娠高峰。雄鼠睾丸下降率季节变化与雌鼠怀孕率季节变化呈同步变动趋势