Abstract No significant difference in growth or percentage mortality was observed among groups of fingerling yellow perch (Perca flavescens) fed four experimental diets. The amount of whole-body fat was positively associated with the amount of dietary fat and metabolizable energy. The amount of whole-body ash was negatively associated with the amount of dietary protein and positively associated with the amount of dietary nitrogen-free extract. The amount of whole-body protein and moisture did not differ significantly among groups fed the various diets.