1995 Volume 43 Issue 4 Pages 511-520
Feeding experiments were performed to investigate the combined use of several protein sources as partial replacement for fish meal in a newly developed soft-dry pellet (SDP) for juvenile and adult yellowtail, Seriola quinqueradiata. The fish weighing 42 g and 140 g on average were fed theexperimental diets containing 20-25% deffated soybean meal (SBM), 5-15% corn gluten meal (CGM) and 12% meat meal (MM) in combination (replacing 54-62% of fish meal) or soy protein concentrate (SPC; replacing 85% of fish meal) for 44 and 146 days, respectively. Palatability of the experimental diets was not influenced by inclusion of these alternative protein sources. The growth rate and feed gain ratio, and the results of hemochemical assessment showed no marked differences among the dietary treatments in both size of fish. This might be due to the elevated levels of protein and digestible energy of the experimental diets being comparable to those of the control fish meal diet. The experimental diet with 50% SPC showed feed performance and physiological condition slightly inferior to the control.
Thus, the results from the present study have indicated that fish meal could be replaced up to 62% by combinations of SBM, CGM and MM in the SDP for both juvenile and adult yellowtail without any adverse effect.
