Abstract:

From 1996 to 2008, we analyzed the change law of population reproductive parameters of Apodemus chevrieri in Dafang County, Guizhou Province. The results show that the population reproduction of Apodemus chevrieri has obvious seasonal periodic fluctuation. The main reproduction period is from April to September and the two peak of pregnancy are from April to May in spring and from August to September in autumn. During the study period, a total of 1080 specimens (556 females, 524 males) were anatomized. The population sex ratio (♀/♂), average catch rate, average Litter size, average reproductive index and average rate of scrotal testis were 1.06, 20.63%, 5.92, 0.67 and 72.05%, respectively. Seasonal changes of male rate of scrotal testis and female pregnancy rate were synchronous in trend. There is variation in population reproductive parameters in different years, month and seasons. Between different age groups, there was significant variation in population reproductive parameters. With the growth of population age, population reproductive capacity increased continuously. There was significant geography variation in population reproductive parameters.