Brown, P.B., Twibell, R.G.
Abstract:
An experiment was conducted to determine the dietary arginine requirement of juvenile yellow perch (Perca flavescens). The basal diet contained 33 g crude protein/100 g diet (23 g crude protein supplied by crystalline L-amino acids and 10 g cure protein supplied by casein and gelatin). Eight dietary treatments contained graded levels of L-arginine-HCl ranging from 0.44 to 1.84 g/100 g dry diet in gradation of 0.2 g/100 g diet. Diets were maintained isonitrogenous with L-glutamic acid. Diets were fed to triplicate groups of fish with an initial weight of 11 g. Dietary arginine significantly affected weight gain and feed efficiency, but not survival. Quadratic regression analysis of weight gain and feed efficiency data indicated the dietary arginine requirement to be 1.61 and 1.41 g/100 g diet, respectively. The authors offer a practical recommendation of 1.41 g L-arginine-HCl/100 g diet for juvenile yellow perch fed purified diets.
(Pardue University, Daprt. of Forestry and Natural Resources, 1159-Forestry Building, West Lafayette, Indiana 47907-1159)
***************