PT  - JOURNAL ARTICLE
AU  - Ephraim M. Hanks
AU  - Devin S. Johnson
AU  - Mevin B. Hooten
TI  - Reflected Stochastic Differential Equation Models for Constrained Animal Movement
AID  - 10.1101/152017
DP  - 2017 Jan 01
TA  - bioRxiv
PG  - 152017
4099  - http://biorxiv.org/content/early/2017/06/19/152017.short
4100  - http://biorxiv.org/content/early/2017/06/19/152017.full
AB  - Movement for many animal species is constrained in space by barriers such as rivers, shore-lines, or impassable cliffs. We develop an approach for modeling animal movement constrained in space by considering a class of constrained stochastic processes, reflected stochastic differential equations. Our approach generalizes existing methods for modeling unconstrained animal movement. We present methods for simulation and inference based on augmenting the constrained movement path with a latent unconstrained path and illustrate this augmentation with a simulation example and an analysis of telemetry data from a Steller sea lion (Eumatopias jubatus) in southeast Alaska.