Home-range size as a predictor of mating systems in Microtus

Breeding populations of Microtus pennsylvanicus and M. ochrogaster were studied for approximately 4 weeks each in central Pennsylvania and south-central Illinois, respectively. Identical radio-telemetric and live-trapping techniques were combined in each study to examine the possible causes of interspecific and intraspecific variation in range size. M. pennsylvanicus exhibited sexually diethic ranging behavior, whereas M. ochrogaster […]