Protein Source for Fish Feed-III. Inclusion of Defatted Soybean Meal in Diet for Fingerling Yellotail.

Abstract

A feeding trial was performed with the fingerling yellowtail Seriola quinqueradiata to evaluate several kinds of defatted soybean meal as a partial substitute for fish meal in the diet. Fish fed on diets including up to 20% commercially available defatted soybean meal showed just as good growth and feed efficiency as that fed on the control diet free from soybean meal and high in fish meal, while feeding with a 30% soybean meal diet appreciably depressed the performance. No marked differences were observed in the general composition of the fish body and the hematological characteristics among the groups, although the concentration of plasma zinc decreased as the soybean meal levels of the diets increased.