The effectiveness of Bayesian state-space models for estimating behavioural states from movement paths

Beyer, Hawthorne L., Morales, Juan M., Murray, Dennis and Fortin, Marie-Josee (2013) The effectiveness of Bayesian state-space models for estimating behavioural states from movement paths. Methods in Ecology and Evolution, 4 5: 433-441. doi:10.1111/2041-210X.12026


Author Beyer, Hawthorne L.
Morales, Juan M.
Murray, Dennis
Fortin, Marie-Josee
Title The effectiveness of Bayesian state-space models for estimating behavioural states from movement paths
Journal name Methods in Ecology and Evolution   Check publisher's open access policy
ISSN 2041-210X
Publication date 2013-05
Year available 2013
Sub-type Article (original research)
DOI 10.1111/2041-210X.12026
Volume 4
Issue 5
Start page 433
End page 441
Total pages 9
Place of publication Oxford, United Kingdom
Publisher Wiley-Blackwell
Collection year 2014
Language eng
Abstract Bayesian state-space movement models have been proposed as a method of inferring behavioural states from movement paths (Morales et al. 2004), thereby providing insight into the behavioural processes from which patterns of animal space use arise in heterogeneous environments. It is not clear, however, how effective state-space models are at estimating behavioural states. We use stochastic simulations of two movement models to quantify how behavioural state movement characteristics affect classification error. State-space movement models can be a highly effective approach to estimating behavioural states from movement paths. Classification accuracy was contingent upon the degree of separation between the distributions that characterize the states (e.g. step length and turn angle distributions) and the relative frequency of the behavioural states. In the best case scenarios classification accuracy approached 100%, but was close to 0% when step length and turn angle distributions of each state were similar, or when one state was rare. Mean classification accuracy was uncorrelated with path length, but the variance in classification accuracy was inversely related to path length. Importantly, we find that classification accuracy can be predicted based on the separation between distributions that characterize the movement paths, thereby providing a method of estimating classification accuracy for real movement paths. We demonstrate this approach using radiotelemetry relocation data of 34 moose (Alces alces). We conclude that Bayesian state-space models offer powerful new opportunities for inferring behavioural states from relocation data.
Keyword Classification accuracy
Correlated random walk
Global positioning system
Mechanistic movement model
Telemetry
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online: 14 February 2013.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Biological Sciences Publications
 
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