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Flexible and practical modeling of animal telemetry data: hidden Markov models and extensions

Roland Langrock, Ruth King, Jason Matthiopoulos, Len Thomas, Daniel Fortin and Juan M. Morales
Ecology
Vol. 93, No. 11 (November 2012), pp. 2336-2342
Published by: Wiley
Stable URL: http://www.jstor.org/stable/41739305
Page Count: 7
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Abstract

We discuss hidden Markov-type models for fitting a variety of multistate random walks to wildlife movement data. Discrete-time hidden Markov models (HMMs) achieve considerable computational gains by focusing on observations that are regularly spaced in time, and for which the measurement error is negligible. These conditions are often met, in particular for data related to terrestrial animals, so that a likelihood-based HMM approach is feasible. We describe a number of extensions of HMMs for animal movement modeling, including more flexible state transition models and individual random effects (fitted in a non-Bayesian framework). In particular we consider so-called hidden semi-Markov models, which may substantially improve the goodness of fit and provide important insights into the behavioral state switching dynamics. To showcase the expediency of these methods, we consider an application of a hierarchical hidden semi-Markov model to multiple bison movement paths.

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