Estimating overlap of daily activity patterns from camera trap data
 M. S. Ridout,
 M. Linkie
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Data from camera traps that record the time of day at which photographs are taken are used widely to study daily activity patterns of photographed species. It is often of interest to compare activity patterns, for example, between males and females of a species or between a predator and a prey species. In this article we propose that the similarity between two activity patterns may be quantified by a measure of the extent to which the patterns overlap. Several methods of estimating this overlap measure are described and their comparative performance for activity data is investigated in a simulation study. The methods are illustrated by comparing activity patterns of three sympatric felid species using data from camera traps in Kerinci Seblat National Park, Sumatra.
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 Title
 Estimating overlap of daily activity patterns from camera trap data
 Journal

Journal of Agricultural, Biological, and Environmental Statistics
Volume 14, Issue 3 , pp 322337
 Cover Date
 20090901
 DOI
 10.1198/jabes.2009.08038
 Print ISSN
 10857117
 Online ISSN
 15372693
 Publisher
 SpringerVerlag
 Additional Links
 Topics
 Keywords

 Circular data
 Clouded leopard (Neofelis diardi)
 Golden cat (Catopuma Temminckii)
 Kernel density estimation
 Overlap coefficient
 Sumatran tiger (Panthera Tigris)
 Trigonometric sum distribution
 Authors

 M. S. Ridout ^{(1)}
 M. Linkie ^{(2)}
 Author Affiliations

 1. Institute of Mathematics, Statistics and Actuarial Science, University of Kent, CT2 7NF, Canterbury, Kent, U.K.
 2. Durrell Institute of Conservation and Ecology, University of Kent, CT2 7NR, Canterbury, Kent, U.K.