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      Dispersal of deer mice, Peromyscus maniculatus : Proximal causes and effects on fitness

      Oecologia
      Springer Nature

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          Abstract

          Dispersal of deer mice, Peromyscus maniculatus, was measured as immigration to and emigration from two control areas, and as immigration to a removal area. The number of mice dispersing was linearly related to the densities on the control areas, while the proportion of the population dispersing (rate of dispersal) was correlated primarily with the rate of increase of control populations. High rates of dispersal were also associated with a breakdown of the established social structure in the spring and fall. Dispersing animals were compared to residents with respect to sex ratio, weight, age, and breeding condition. The types of animals dispersing varied seasonally: light-weight, non-breeding males dispersed in the spring and summer; juveniles and breeding males dispersed at the end of the breeding season; and light-weight mice of both sexes dispersed over the winter. It is proposed that the animals that dominated the dispersal samples each season were moving in response to social pressure from residents, or local limitations of some resource, and thus, that dispersal was adaptive for the individuals concerned. Some tests of the hypotheses concerning resource limitation are suggested.

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          Most cited references16

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          Population Responses to Patchy Environments

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            Disturbance, Patch Formation, and Community Structure

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              Genetic Polymorphism in Heterogeneous Environments

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                Author and article information

                Journal
                Oecologia
                Oecologia
                Springer Nature
                0029-8549
                1432-1939
                1978
                1978
                : 32
                : 2
                : 171-193
                Article
                10.1007/BF00366070
                28309396
                9cb59b4b-3dbd-4e90-8bef-30fbe603674f
                © 1978
                History

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