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    Geographic Variation in Vocalizations of California Chipmunks Tamias obscurus and T. merriami

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    Subject
    Geographic Variation; Vocalizations; California; Chipmunks; Tamias obscurus; T. merriami
    Author
    Blankenship, Daniel J.; Brand, Leonard R.
    Journal Title
    Scas: Bulletin of the Southern California Academy of Sciences
    Volume
    86
    Issue
    scas/vol86/iss3; 3
    Metadata
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    URI
    https://scholar.oxy.edu/handle/20.500.12711/9481
    Abstract
    Vocalizations of chipmunks were analyzed from isolated mountain ranges of California to determine the extent of interspecific and intraspecific variation in chip calls. For calls recorded, based on five measurements per emission, the two species showed significant differences in vocal parameters measured from sonagrams. Significant intraspecific variation in chip calls suggests that populations of chipmunks have achieved a level of divergence in chip calls in some cases equivalent to differences between populations belonging to different species. The terminal pulse is first described for Tamias merriami, along with a presentation of the previously undescribed T. obscurus vocalization pattern.
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