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The effects of survey protocol on detection probabilities and site occupancy estimates of summer breeding anurans

The effects of survey protocol on detection probabilities and site occupancy estimates of summer... The effects of survey protocol on detection probabilities and site occupancy estimates of summer breeding anurans Michelle M. Gooch 1 , Aubrey M. Heupel 1,2 , Steven J. Price 1,3 and Michael E. Dorcas 1 1 Department of Biology, Davidson College, Davidson, North Carolina 28035-7118, U.S.A. 2 Present address: Dept. Nat. Resource Ecology and Management, Iowa State University, Ames, Iowa 50011, U.S.A. 3 Corresponding author; e-mail: sjprice@davidson.edu Abstract. Recent declines in amphibian populations have created an urgent need for large-scale, long- term monitoring efforts and many anuran monitoring programs have been established that utilize calling surveys. Calling surveys can be effective monitoring tools; however, differences among survey protocols may bias survey results. Failure to take into account detection probabilities when monitoring anurans can lead to inaccurate inferences about site occupancy, since non-detections in survey data do not necessarily mean that a species is absent unless the probability of detection is 1. We used a likelihood-based method, in the form of the computer program PRESENCE, to estimate detection probabilities and site occupancy rates for summer-breeding anurans in the Western Piedmont of North Carolina. Using detection data from calling surveys, we evaluated how detectability and site occupancy for five anuran http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Herpetology Brill

The effects of survey protocol on detection probabilities and site occupancy estimates of summer breeding anurans

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Publisher
Brill
Copyright
© 2006 Koninklijke Brill NV, Leiden, The Netherlands
ISSN
1570-7539
eISSN
1570-7547
DOI
10.1163/157075406776984211
Publisher site
See Article on Publisher Site

Abstract

The effects of survey protocol on detection probabilities and site occupancy estimates of summer breeding anurans Michelle M. Gooch 1 , Aubrey M. Heupel 1,2 , Steven J. Price 1,3 and Michael E. Dorcas 1 1 Department of Biology, Davidson College, Davidson, North Carolina 28035-7118, U.S.A. 2 Present address: Dept. Nat. Resource Ecology and Management, Iowa State University, Ames, Iowa 50011, U.S.A. 3 Corresponding author; e-mail: sjprice@davidson.edu Abstract. Recent declines in amphibian populations have created an urgent need for large-scale, long- term monitoring efforts and many anuran monitoring programs have been established that utilize calling surveys. Calling surveys can be effective monitoring tools; however, differences among survey protocols may bias survey results. Failure to take into account detection probabilities when monitoring anurans can lead to inaccurate inferences about site occupancy, since non-detections in survey data do not necessarily mean that a species is absent unless the probability of detection is 1. We used a likelihood-based method, in the form of the computer program PRESENCE, to estimate detection probabilities and site occupancy rates for summer-breeding anurans in the Western Piedmont of North Carolina. Using detection data from calling surveys, we evaluated how detectability and site occupancy for five anuran

Journal

Applied Herpetology – Brill

Published: Jan 1, 2006

Keywords: NORTH CAROLINA; FROG; MONITORING PROGRAM; PRESENCE; ANURAN CALLING SURVEY

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