Bayesian modeling and example code
We used JAGS (Plummer, 2003) , accessed with the jagsUI package (Kellner, 2014) in R v. 3.2.3 (R Core Team 2016), to run the spatial mark-recapture analysis. Estimates were calculated from 4,500 MCMC samples, taken from 3 chains run for 5,000 iterations, thinned by 3, following a burn-in of 500. Below is the code we used to fit our spatial mark-recapture model with telemetry data to a population of coastal martens in central Oregon.
Supplemental summary of Pacific marten location data
Summary of location data collected by individual Pacific marten (Martes caurina). We collected spatial locations (Lxns) on marten when they were radio collared (Tracking period) with either a G10 snap technology GPS unit (27g, Advanced Telemetry Systems, “ATS”), a M1820 VHF unit made by ATS (27g; “VHF”), or a Quantum 4000 micro-mini GPS unit made by Telemetry Solutions (41-44g, “TS”). Location data were collected in the Oregon Dunes Recreation Area between October 2015 and January 2016. We estimated territories using 99% Local Convex Hulls (LoCoH) and here we report distance from territory center to the furthest edge of their territory (Radius).
Percent cover associated with marten GPS locations in the Oregon Dunes
Percent forest cover (vegetation height >1 m estimated from LiDAR) within a 100 m moving radius of spatial locations collected using VHF and GPS telemetry of martens in coastal Oregon from October 2015 to January 2016. The average lower quantile combined with the demonstrated forested amount within home ranges were used to inform thresholds for territory mapping.
Supplemental meta-analysis of technical articles relating North American marten density and home range size
Technical articles that included the keywords “marten”, “density”, “territory”, and “home range”. Of the >75 papers reviewed for North American martens (Martes americana, M. caurina), four reported both home range sizes and density. Territories were estimated using either 100% Minimum Convex Polygons (MCP) or time-influenced Local Convex Hulls (t-LoCoH). Reported densities were either minimum known alive (MNKA) or calculated with spatial mark-recapture (SMR). Studies were conducted in Maine, USA (Payer and Harrison 1999), central British Columbia, Canada (Poole et al. 2004), New Hampshire, USA (Siren et al. 2016), and Quebec, Canada (Godbout and Ouellet 2010).