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    Author(s): Paul Stephen Corn; Erin Muths; Amanda M. Kissel; Rick D. Scherer
    Date: 2011
    Source: Copeia. 2011(3): 365-371.
    Publication Series: Scientific Journal (JRNL)
    Station: Rocky Mountain Research Station
    PDF: View PDF  (211.15 KB)

    Description

    Call surveys used to monitor breeding choruses of anuran amphibians generate index values that are frequently used to represent the number of male frogs present, but few studies have quantified this relationship. We compared abundance of male Boreal Chorus Frogs (Pseudacris maculata), estimated using capture-recapture methods in two populations in Colorado, to call index values derived from automated recordings. Single index values, such as might result from large monitoring efforts, were unrelated to population size. A synthetic call saturation index (CSI), the daily proportion of the maximum possible sum of index values derived from multiple recordings, was greater in larger populations, but the relationship was not highly predictive.

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    Citation

    Corn, Paul Stephen; Muths, Erin; Kissel, Amanda M.; Scherer, Rick D. 2011. Breeding chorus indices are weakly related to estimated abundance of boreal chorus frogs. Copeia. 2011(3): 365-371.

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    Keywords

    Boreal Chorus Frogs, Pseudacris maculata, call saturation index (CSI)

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