Survival and Dispersal of Young White-Footed Mice Born in Nest Boxes

Thirty-nine litters of white-footed mice were followed from birth in nest boxes until establishment of home ranges in an isolated, 2-ha woodlot

T. R. Goundie

2006

Scholarcy highlights

  • Thirty-nine litters of white-footed mice were followed from birth in nest boxes until establishment of home ranges in an isolated, 2-ha woodlot
  • The sex ratio at birth was significantly biased toward males in the spring and females in the fall
  • Mothers were significantly heavier in spring than in fall
  • 39 of 97 pups were weaned, while in the fall only 8 of 67 were weaned
  • After three weeks of age the expectation of further life was more than 9 weeks for spring-born and less than 3 weeks for fall-born mice
  • Young left the nest at an average age of 5.6 weeks
  • These small dispersal distances, coupled with a near absence of immigration and low spring populations, suggest the possibility of inbreeding

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