关键词: 大仓鼠, 黑线仓鼠, 种群动态, 繁殖

Abstract: The population dynamics of ratlike hamster (cricetulus triton)and striped hamster (cricetulus barabensis) has been studied in northern Huaibei River, Anhui, during 1982 to 1988, The results are as follows: The peaks of the seasonal numbers of ratlike hamster in the fluctuation curve varies from year to year. There were three peaks(Mar., July, Oct.) in higher-number year, two (July, Oct) in middle-number year and one (Oct., or Nov.) in lower-number year,. for striped hamster, there were two-(Apr., Aug) in higher-number year and one (Mar. to May) in lower-number year. The annual number variations of the former and the latter in 8 years(from 1981-1988) are in figure 3 in the fluctuation curve respectively. The reproductive periods of ratlike hamster and striped hamster in this area last 7 months(Apr. to Oct.) and 10months(feb. to Nov) respectively, and both of them have two peaks during reproduction(one in spring and the other in autumn). Analysis showed that the pregnancy rate of the former is remarkably positive correlated with the number in this year(correlation coefficient r value is 0.894)and that of the latter only affects the numbers of the next year( r value is 0.919).

Key words: Ratlike hamster, Cricetulus triton, Striped hamster, Cricetulus barabensis, Population dynamic, Reproduction