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Continuous-time correlated random walk model for animal telemetry data

Citation

Johnson, DS and London, JM and Lea, MA and Durban, JW, Continuous-time correlated random walk model for animal telemetry data, Ecology, 89, (5) pp. 1208-1215. ISSN 0012-9658 (2008) [Refereed Article]


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Copyright Statement

Copyright 2008 by the Ecological Society of America

Official URL: http://www.esajournals.org/loi/ecol

DOI: doi:10.1890/07-1032.1

Abstract

We propose a continuous-time version of the correlated random walk model for animal telemetry data. The continuous-time formulation allows data that have been nonuniformly collected over time to be modeled without subsampling, interpolation, or aggregation to obtain a set of locations uniformly spaced in time. The model is derived from a continuous-time Ornstein-Uhlenbeck velocity process that is integrated to form a location process. The continuous-time model was placed into a state–space framework to allow parameter estimation and location predictions from observed animal locations. Two previously unpublished marine mammal telemetry data sets were analyzed to illustrate use of the model, by-products available from the analysis, and different modifications which are possible. A harbor seal data set was analyzed with a model that incorporates the proportion of each hour spent on land. Also, a northern fur seal pup data set was analyzed with a random drift component to account for directed travel and ocean currents.

Item Details

Item Type:Refereed Article
Keywords:Argos location; Callorhinus ursinus; correlated random walk; harbor seal; integrated stochastic process; kalman filter; marine mammals; northern fur seal; Phoca vitulina; satellite telemetry; state–space model.
Research Division:Mathematical Sciences
Research Group:Statistics
Research Field:Applied Statistics
Objective Division:Environment
Objective Group:Natural Hazards
Objective Field:Natural Hazards in Marine Environments
UTAS Author:Lea, MA (Associate Professor Mary-Anne Lea)
ID Code:52290
Year Published:2008
Web of Science® Times Cited:260
Deposited By:Zoology
Deposited On:2008-06-16
Last Modified:2014-11-24
Downloads:2 View Download Statistics

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