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1 June 2011 Using a General Index Approach to Analyze Camera-Trap Abundance Indices
Andrew J. Bengsen, Luke K.-P. Leung, Steven J. Lapidge, Iain J. Gordon
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Abstract

The lack of variance estimates constrain the utility of abundance indices calculated from camera-trap data. We adapted a General Index model, which allows variance estimation, to analyze camera-trap observations of feral pigs (Sus serofa) for population monitoring in a tropical rainforest. We tested whether the index would respond to population manipulation, and found that it decreased by 57% following removal of 24 pigs and remained low in the following period. Our method is useful for monitoring other large animals in difficult landscapes, and the model can be used to enhance the value of existing data sets.

© 2011 The Wildlife Society.
Andrew J. Bengsen, Luke K.-P. Leung, Steven J. Lapidge, and Iain J. Gordon "Using a General Index Approach to Analyze Camera-Trap Abundance Indices," Journal of Wildlife Management 75(5), 1222-1227, (1 June 2011). https://doi.org/10.1002/jwmg.132
Received: 9 February 2010; Accepted: 16 November 2010; Published: 1 June 2011
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KEYWORDS
abundance index
Camera trap
feral pig
remote monitoring
Sus scrofa
wet tropics
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