Phenotypic data for all viable hatchlings collected for this study. Carapace and plastron measurements (in mm) and mass was measured for both the 2015 and 2016 cohort. Locomotor performance data on a 1m track was measured for the 2016 cohort only. Locomotor data (latency time, total time, initial speed, average speed, and max speed) is averaged across trials for each individual