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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
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 Two previously unpublished marine mammal telemetry data sets were analyzed to illustrate use of the model, by-products available from the analysis, and different modifications which are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 |
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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: | Environmental Policy, Climate Change and Natural Hazards |
Objective Group: | Natural hazards |
Objective Field: | Natural hazards not elsewhere classified |
UTAS Author: | Lea, MA (Professor Mary-Anne Lea) |
ID Code: | 52290 |
Year Published: | 2008 |
Web of Science® Times Cited: | 410 |
Deposited By: | Zoology |
Deposited On: | 2008-06-16 |
Last Modified: | 2014-11-24 |
Downloads: | 2 View Download Statistics |
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