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Multiple-Species Models for True Abundances Allowing for Heterogeneity of Capture Between and Within Species

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abstract
In any ecological community, the probabilities for observance (capture) of individual animals often differ both within and between species. Previous research involving multiple species' abundances have largely ignored this fact. In this paper, we explore the use of finite mixture modeling to quantify species' true abundances within a population while allowing for unknown differences in the individuals' capture probabilities. This modeling also allows us to develop diversity and evenness measures based on true abundances of species. Our methods are shown to be applicable in both the capture/recapture and removal sampling settings. We demonstrate our methods with a fisheries removal example; our techniques are then applied to several other fisheries data sets. We evaluate our methods on a series of test data sets we constructed using empirical probabilities of capture. Finally, multiple simulations were run to create data sets from generating models and check the main features of the models, especially abundance estimates and species' parameters.
subject
capture-recapture
finite mixtures
species abundances
contributor
Dixon, Kari Crowell (author)
Norris, James L (committee chair)
Berenhaut, Kenneth S (committee member)
Erway, Jennifer (committee member)
date
2013-08-23T08:35:15Z (accessioned)
2013 (issued)
degree
Mathematics (discipline)
10000-01-01 (liftdate)
embargo
forever (terms)
identifier
http://hdl.handle.net/10339/39016 (uri)
language
en (iso)
publisher
Wake Forest University
title
Multiple-Species Models for True Abundances Allowing for Heterogeneity of Capture Between and Within Species
type
Thesis

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