The Research of Age Structure and Sex Ratio of Anourosorex squamipes

[Objective] The aim was to study the age structure and sex ratio of Anourosorex squamipes and lay a foundation for group quantity forecasting.[Method] 929 Anourosorex squamipes(434♂,495♀) captured from March 2005 to February 2006 in the suburbs of Nanchong City,Sichuan,were divided into four age groups,the age structure,sex ratio and seasonal dynamics of 12 months were analyzed.[Result] The seasonal variation of the age structure display: from December 2005 to February 2006,the population density is very low and the subadult group(I) was dominant,from April to September 2005,the most dominant group was the second adult group(Ⅲ).Except captured subadult male group(I) slightly more than females,slightly more females captured in other groups,the overall number of female is slightly more than males(♂/♀ 0.88),but the chi-square test showed no significant differences with 1∶1 in each age group.During investigation,the sex ratio of each month is fluctuations between 0.64-2.00(♂/♀).Significantly more females captured than the male in September(21,46.67%).[Conclusion] The subadult group(I) dominated population in winter.Sex ratio in each age group was in line with the ratio of 1∶1.