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A flexible movement model for partially migrating species

March 30, 2022

We propose a flexible model for a partially migrating species, which we demonstrate using yearly paths for golden eagles (Aquila chrysaetos). Our model relies on a smoothly time-varying potential surface defined by a number of attractors. We compare our proposed approach using varying coefficients to a latent-state model, which we define differently for migrating, dispersing, and local individuals. While latent-state models are more common in the existing animal movement literature, varying coefficient models have various benefits including the ability to fit a wide range of movement strategies without the need for major model adjustments. We compare simulations from the models for three individuals to illustrate the ability of our model to better describe movement behavior for specific movement strategies. We also demonstrate the flexibility of our model by fitting several individuals whose movement behavior is less stereotypical.

Publication Year 2022
Title A flexible movement model for partially migrating species
DOI 10.1016/j.spasta.2022.100637
Authors Elizabeth Eisenhauer, Ephraim M. Hanks, Matthew Beckman, Robert Murphy, Tricia A. Miller, Todd E. Katzner
Publication Type Article
Publication Subtype Journal Article
Series Title Spatial Statistics
Index ID 70230117
Record Source USGS Publications Warehouse
USGS Organization Forest and Rangeland Ecosystem Science Center