Behavioral interactions of adult females of the common shrew (Sorex araneus) with conspecifics on familiar territory

Abstract

Interactions of overwintered females with conspecifics (> or = 5 days) on familiar territories were studied experimentally. In interactions of the resident females with unfamiliar overwintered females (28 experiments), there were no differences related to the reproductive status of both parties. Between the behavior of the residents and aliens, there were no significant differences, except the refusals of contacts--and aliens had more of it. Identification and affiliative behavior and the presence of ritualized aggression was noted. There was little direct aggression. Females were sharply aggressive toward the overwintered males (23 experiments) regardless of their reproductive status. Males tried to avoid contacts. Identification and affiliative behavior were rare. Toward yearlings (25 experiments), females that participated in reproduction were aggressive (direct aggression prevailed) and singles (9 experiments) were not.