Eye diameter, body length, and clutch size measurements for D. obtusa isolated from Knobby Knees Pond, Congaree National Park, South Carolina

Eye diameter (um), body length (um), and clutch size (number of eggs) measurements on a wild population of Daphnia obtusa from Knobby Knees (KNB) Pond, Congaree National Park, South Carolina. Each data row corresponds to the associated measures for a single D. obtusa from KNB Pond. Clutch size was measured from living individuals within 36 hours of capture. Animals were immediately preserved in ethanol and marked following clutch counts. Eye diameter and body length were then measured on preserved individuals.