Breeding chorus indices are weakly related to estimated abundance of Boreal Chorus Frogs

Copeia
By: , and 

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Abstract

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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Publication type Article
Publication Subtype Journal Article
Title Breeding chorus indices are weakly related to estimated abundance of Boreal Chorus Frogs
Series title Copeia
DOI 10.1643/CH-10-190
Volume 3
Year Published 2011
Language English
Publisher American Society of Ichthyologists and Herpetologists
Publisher location New York, NY
Description 7 p.
First page 365
Last page 371
Country United States
State Colorado
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