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Detection of Wood Frog Egg Masses and Implications for Monitoring Amphibian Populations

Citation

Rick D Scherer, Detection of Wood Frog Egg Masses and Implications for Monitoring Amphibian Populations: .

Summary

Annual counts of egg masses have been promoted as an appropriate state variable for monitoring populations of some amphibian species. However, if some egg masses are not detected and detectability changes over time, the use of egg mass counts is unreliable. Variation in counts of egg masses may be indicative of variation in actual abundance or variation in detectability. I used closed capture–recapture models to estimate detection probability and evaluate potential sources of variation in the detectability of Wood Frog (Rana sylvatica) egg masses in a pond in Rocky Mountain National Park in 2003 and 2004. Model selection results and model-averaged estimates provided evidence that detection probability varied between years. However, [...]

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Rick D Scherer

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  • Upper Colorado River Basin

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From Source - Mendeley RIS export <br> On - Tue May 10 10:19:05 CDT 2011

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Title Citation Detection of Wood Frog Egg Masses and Implications for Monitoring Amphibian Populations

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