Brian J. Burke, North Carolina State University, Box 7617, Raleigh, NC 27607

Abstract. Few predation models that simulate effects on prey survival and size structure also predict the corresponding effects on predator growth and size structure. To make this linkage, I parameterized a bioenergetics model for Paralichthys lethostigma. Weight-dependent maximum consumption rates were determined experimentally. Flounder (60-190 mm) were placed in a 10-L container, acclimated for seven days, and fed five mummichogs (Fundulus heteroclitus) per day for seven days. The relationship was best described by the equation Cmax = 0.1993*W-^0.31 (R²=0.72, n=19), where C max was measured in g/g/day and W was weight in grams. Weight-dependent respiration rates were also determined by placing flounder (140-300 mm) in a 16-L closed respirometer and measuring oxygen concentrations at 5-min. intervals. Weight-dependent respiration rates were best described by the equation Resp = 0.596*W-^0.4008 (R²=0.52, n=8) where Resp was measured in g O₂ /g/day and W was weight in grams. All remaining parameters were taken from existing literature. This energetics model was tested using data from two independent feeding and growth trials. Food consumption predicted by the model from growth data matched reasonably well with observed consumption data. The model can predict growth of 60-300 mm southern flounder over a wide range of temperatures and feeding rates.