Abstract
With the reference to Nopporo field example in the previous report (Higuchi and Hayashi, 2005), it is possible to simulate a population of more than 100/ha through Leslie matrix with high birth rate, for instant 3.0, and the same survival rate as in Nopporo example in each cohort. In this connection, birth rate is : 'average number of embryo' (5.0)×'ratio of female to male' (0.5)×'time of pregnancy per month' (1.0〜1.5)=2.25〜3.75, moreover with 'pregnancy rate per female' (0.0〜1.0), adjusting to actual birth number. Monthly age class structure is a vector which is projected through Leslie Matrix with pertinent growth rate and survival rate from the former month vector, and is useful for the index of population growth in the red-backed vole.
