The Effect of Artificial Light on Orientation of Hatchling Loggerhead Sea Turtles (Caretta caretta)

Emily S. Wooley, Louis E. Keiner, Scott L. Parker, H. Erin Rickard, and Eric T. Koepfler

Ichthyology & Herpetology 112: 328–338

Supplemental Fig. 1. Satellite radiance values for (A) the extent of light pollution present in the Grand Strand Region of South Carolina and (B) the relatively low levels of light pollution present in areas surrounding Myrtle Beach. Relatively low levels of artificial light were used to create a baseline of sampling for this study.

Supplemental Fig. 2. Light pollution groups calculated by two-step cluster analysis based on observed radiance values present at time of emergence under new moon conditions. Artificial light pollution conditions represent three of the four lighting conditions sea-finding behavior is examined under, with the fourth group encompassing emergences that occurred under partial or full moon phases when moonlight was present.