Abstract:

We use the ratio between body weight without viscera and body length without viscera as the body weight/length without viscera index (KWL′). We analyzed the body weight/length without viscera index of 285 samples of Apodemus chevieri (138 female, 147 male) which were captured in Dafang County, Guizhou provience from 2008 to 2010. The body weight/length without viscera index were between 1.38 g/cm and 3.32 g/cm. The average is (1.90±0.32) g/cm. The results show that there is significant variation in the index between male and female and the variation in different environment is not significant. There is significant variation in the index among different age groups. The body weight/length without viscera index increased with the growth of population age. The body weight/length without viscera index varied significantly by season and the change trend is spring>autumn>summer>winter. The body weight/length without viscera index is closely related with population reproduction. This can be used as reference to forecast the changes of population density.