关键词: 大仓鼠, 种群生态, 繁殖

Abstract: This paper reports the population breedimg eoology of greater long-tailed hamster (Cricetulus triton) in Beijing agricultural area from 1983 to 1985. 1101 specimens (497♀, 604♂) were collected, dissected, measured.The variation of reproductive system of males and females was observed and recorded.The sex ratio, the testis weight and length of males, the reproductive characteristics of females, the reproductive indices, and the litter size in different years were studied.The life-span of greater long-tailed hamster is about one year. The male reach es sex maturity when the testis weight is more than 1.5g. The female youngs born in spring reach sex maturity in two months and attend reproduction immediately, the youngs born after July can not reach sex maturity this year. Overwintering females can reproduct 2-3 times one year.

Key words: Greater long-tailed hamster, Cricetulus triton, Population ecology, Breeding