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

摘要： 1983—1985年,作者在北京农田区研究了大仓鼠的种群生态。获得标本1101号(♀497,♂604),解剖、观察、测量、记录雌雄生殖系统的变化及繁殖特征。对大仓鼠的雌雄性比、平均胎仔数、怀孕率等作了分析。结果:春季出生的雌鼠,两个月左右即达性成熟,并参加繁殖,在7月以后出生的雌鼠当年不参加繁殖。越冬鼠一年可繁殖2—3次。在数量较高的1983年,性比(♂/♀)为1.33,平均胎仔数为9.24;数量次高的1984年,性比为1.20,平均胎仔数为9.29;数量较低的1985年,性比为0.95,平均胎仔数为9.94。在数量较低的年份,大仓鼠种群的各项繁殖指标均优于数量较高的年份。

关键词: 大仓鼠, 种群生态, 繁殖