Abstract
The relationship between fourteen demographic variables and home range size of three age classes (adults, subadults and juveniles) was studied in two live-trapped populations of Microtus ochrogaster in eastern Kansas, USA. There was a linear negative association between home range size and density for adult females. There was no correlation between these two variables for other age classes. Home range size of adult and subadult males was positively associated with dispersal rate. A Stepwise Multiple Regression and Principal Component Analysis indicated that different demographic variables were important in a statistical sense in explaining variation in home range size for each age class. The interaction between dispersal and home range size is discussed in the context of population regulation of microtine rodents.
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