Research Project Report
Abstract
The social structure of a mammalian species is a basic feature of its life history. Although a knowledge of the social system is prerequisite to understanding various reproductive and endocrinologic phenomena seen by other workers studying Microtus, Mus, and Peromyscus in the laboratory, behavior and sociality of Microtus in the field have been overlooked because they are difficult to study and because emphasis in microtine research has been placed on the microtine population "cycle". Project Number 183.