Studies on the Utilization of Full-Fat Soybean and Solvent Extracted Soybean Meal in a Complete Diet for Rainbow Trout

Abstract

An experimental feeding trial was conducted with rainbow trout to compare the nutritive value of five commercially avaiable soybean meals (puffed full-fat soybean, toasted full-fat soybean, hexane extracted soybean, extruded hexane extracted soybean and alcohol extracted soybean) as a partial replacement for Peruvian fish meal in a practical ration. The dietary level of Peruvian fish meal was reduced from 35% to 10% and the level of soybean meal increased from 0% to 50%, replacing up to 75% of the Peruvian fish meal protein, with no adverse effects on overall growth performance or feed utilizatin efficiency. There was no apparent difference between treatments on the basis of the five soybean meals tested. The results are discussed in the light of possible anti-nutritional factors present within soybean.