Foraging density distributions were represented by utilization
distribution (UD) contours, indicating areas within which
tracked turtles spent 50%, 75%, 95% and 100% of their presumed foraging
at-sea time. The 100% and 50% UD are interpreted as overall
distribution of foraging areas and core foraging areas of turtles during
the tracking period, respectively (González Carman et al., 2012).
Data on plastic debris distribution and green turtle foraging areas
were plotted together using ArcGIS 10.1 (CopyrightESRI) to visually
explore green turtle exposure to plastic debris while foraging in
the Río de la Plata.