Effect of supplementation with enzyme complex to non-fish meal diet in adult red sea bream Pagrus major

Abstract

The effect of supplementation with an enzyme complex (produced by solid state fermentation, SSF) to a non-fish meal diet for adult red sea bream was evaluated. The SSF complex contained protease, amylase, xylanase, β-glucanase, pectinase, cellulase, and phytase. A fish meal based diet (50% fish meal, FM50) was used as the control diet, also a non-fish meal diet (FM0) was used as the basal diet, formulated with corn gluten meal, soy protein concentrate, and defatted soybean meal. SSF complex was supplemented to the non-fish meal diet at a level of 0.13% (FM0S). Adult red sea bream weighing 328.8 g on average, were fed the experimental diets for 16 weeks. Depression of the daily feed intake was observed in fish fed FM0 diet (P < 0.05), on the other hand, daily feed intake in fish fed FM0S was improved to the same level as FM50 group. Growth was highest in fish fed FM0S diet. After feeding, the gastric evacuation rate and plasma triglyceride level from fish fed FM0S respectively were faster and higher than fish fed FM0. These results suggested that supplementation with SSF complex to a non-fish meal diet enhances feed intake and growth in adult red sea bream.