title: Leveraging constraints and biotelemetry data to pinpoint repetitively used spatial features.
abstract: Satellite telemetry devices collect valuable information concerning the sites visited by animals, including the location of central places like dens, nests, rookeries, or haul-outs. Existing methods for estimating the location of central places from telemetry data require user-specified thresholds and ignore common nuances like measurement error. We present a fully model-based approach for locating central places from telemetry data that accounts for multiple sources of uncertainty and uses all of the available locational data. Our general framework consists of an observation model to account for large telemetry measurement error and animal movement, and a highly flexible mixture model specified using a Dirichlet process to identify the location of central places. We also quantify temporal patterns in central place use by incorporating ancillary behavioral data into the model; however, our framework is also suitable when no such behavioral data exist. We apply the model to a simulated data set as proof of concept. We then illustrate our framework by analyzing an Argos satellite telemetry data set on harbor seals (Phoca vitulina) in the Gulf of Alaska, a species that exhibits fidelity to terrestrial haul-out sites.
authors.affiliation: Department of Fish, Wildlife, and Conservation Biology, Colorado State University, 1474 Campus Delivery, Fort Collins, Colorado, 80523, USA.
authors.forename: Brian M
authors.initials: BM
authors.lastname: Brost
authors.affiliation: Department of Fish, Wildlife, and Conservation Biology, Colorado State University, 1474 Campus Delivery, Fort Collins, Colorado, 80523, USA.|Colorado Cooperative Fish and Wildlife Research Unit, Colorado State University, 201 J.V.K. Wagar Building, 1484 Campus Delivery, Fort Collins, Colorado, 80523, USA.|Statistics Department, Colorado State University, 102 Statistics Building, Fort Collins, Colorado, 80523, USA.
authors.forename: Mevin B
authors.initials: MB
authors.lastname: Hooten
authors.affiliation: Alaska Department of Fish and Game, P.O. Box 115526, Juneau, Alaska, 99811, USA.
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Small
mesh_terms: D000413:Alaska; D000818:Animals; D004463:Ecology; D004784:Environmental Monitoring / Q000379:methods*; D046049:Phoca; D013686:Telemetry
keywords: 
  Phoca vitulina
  ; Bayesian analysis; Dirichlet process; basis function; data fusion; harbor seal; hierarchical model; integrated data model; mixture model; nonparametric; temporal dependence