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    Distinguishing the Endangered Stephens' Kangaroo Rat (Dipodomys stephensi) from the Pacific Kangaroo Rat (Dipodomys agilis)

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    Subject
    Stephens' Kangaroo Rat; Dipodomys stephensi; Pacific Kangaroo Rat; Dipodomys agilis
    Author
    Price, Mary V.; Kelly, Patrick A.; Goldingay, Ross L.
    Journal Title
    Scas: Bulletin of the Southern California Academy of Sciences
    Volume
    91
    Issue
    scas/vol91/iss3; 3
    Metadata
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    URI
    https://scholar.oxy.edu/handle/20.500.12711/9225
    Abstract
    Efforts to conserve the endangered Stephens' Kangaroo Rat have been complicated by its morphological similarity to the sympatric Pacific Kangaroo Rat. We used discriminant analysis of a variety of morphometric characters to develop a protocol for distinguishing these two species in the field. The species differ significantly in skull, hair, and external metric characters measured on live specimens. Discriminant analysis indicated that the two species can be distin- guished more successfully on the basis of weight, ear length, and head shape than on the basis of hair characters alone. We outline a simple and effective protocol for identifying live-captured specimens using ear length and postorbital head width.
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