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Infanticide and other reproductive strategies in the collared lemming, Dicrostonyx groenlandicus

Abstract

COMPETITION among males for females may continue after mating1. For example, postfertilisation competition among males occurs in many primates2. In rodents, unfamiliar (or strange) males can block pregnancy (Bruce effect) either before3–9 or after7,9 implantation. Here, we report on postparturition effects of unfamiliar males in the collared lemming (Dicrostonyx groenlandicus) and discuss the significance of these effects on reproductive strategies in this species.

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