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Point Transect Sampling Along Linear Features

Point Transect Sampling Along Linear Features Summary Distance sampling is a widely used methodology for assessing animal abundance. A key requirement of distance sampling is that samplers (lines or points) are placed according to a randomized design, which ensures that samplers are positioned independently of animals. Often samplers are placed along linear features such as roads, so that bias is expected if animals are not uniformly distributed with respect to distance from the linear feature. We present an approach for analyzing distance data from a survey when the samplers are points placed along a linear feature. Based on results from a simulation study and from a survey of Irish hares in Northern Ireland conducted from roads, we conclude that large bias may result if the position of samplers is not randomized, and analysis methods fail to account for nonuniformity. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Biometrics Wiley

Point Transect Sampling Along Linear Features

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References (25)

Publisher
Wiley
Copyright
© 2010, The International Biometric Society Peterson Institute for International Economics
ISSN
0006-341X
eISSN
1541-0420
DOI
10.1111/j.1541-0420.2009.01381.x
pmid
20105157
Publisher site
See Article on Publisher Site

Abstract

Summary Distance sampling is a widely used methodology for assessing animal abundance. A key requirement of distance sampling is that samplers (lines or points) are placed according to a randomized design, which ensures that samplers are positioned independently of animals. Often samplers are placed along linear features such as roads, so that bias is expected if animals are not uniformly distributed with respect to distance from the linear feature. We present an approach for analyzing distance data from a survey when the samplers are points placed along a linear feature. Based on results from a simulation study and from a survey of Irish hares in Northern Ireland conducted from roads, we conclude that large bias may result if the position of samplers is not randomized, and analysis methods fail to account for nonuniformity.

Journal

BiometricsWiley

Published: Dec 1, 2010

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