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A new mixture model for capture heterogeneity

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We propose a mixture of binomial and beta–binomial distributions for estimating the size of closed populations. The new mixture model is applied to several real capture–recapture data sets and is shown to provide a convenient, objective framework for model selection. The new model is compared with three alternative models in a simulation study, and the results shed light on the general performance of models in this area. The new model provides a robust flexible analysis, which automatically deals with small capture probabilities.

Keywords: Beta; Capture; Logistic; Mixture of binomials; Population size estimation; binomial; normal; recapture

Document Type: Research Article


Affiliations: University of Kent, Canterbury, UK

Publication date: September 1, 2008

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