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Annual reproduction patterns in populations of two sympatric species ofPeromyscus

Authors
Journal
Behavioral Biology
0091-6773
Publisher
Elsevier
Publication Date
Volume
23
Issue
3
Identifiers
DOI: 10.1016/s0091-6773(78)91463-3

Abstract

Data on annual recruitment patterns were gathered for two sympatric species of Peromyscus: P. leucopus noveboracensis and P. maniculatus gracilis. One-hectare grids were trapped in a mixed deciduous forest in northwestern Massachusetts. Results for all four dependent variables (pregnancy, nonpregnancy, molting, and body weights) indicated a bimodal pattern of recruitment for P. leucopus noveboracensis and a unimodal pattern for P. maniculatus gracilis. Several alternative explanations involving recent sympatry of the two species and possible competition are discussed.

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