Gps 72h

We located telemetered turtles using a receiver (R-1000, Communication Specialists) and Yagi antenna once per week during the active season (May–September), every 2 wk during overwinter ingress (October–November) and egress (March–April), and once per month for the remainder of the overwintering period (December–February). At each location, we determined the coordinate position (≤7-m accuracy) using GPS units (GPS 72H, Garmin) and plotted locations on maps using ArcMap v10.2.2 (ESRI, Redlands, CA). We estimated annual home range size (100% minimum convex polygon) for each turtle using Geospatial Modelling Environment (Beyer 2012 ) and Program R v4.2.1 (R Core Team 2017 ) as extensions of ArcMap v10.2.2. We measured movement rates as Euclidian distances between sequential locations divided by the number of days elapsed between observations. We only used years when the turtle was tracked for the entire annual cycle in space use and movement analyses. We estimated annual home range size and movement rates repeatedly in individual turtles for various durations, including over 4 yr (n = 4), 5 yr (n = 7), 6 yr (n = 13), 7 yr (n = 5), and 8 yr (n = 9).