Use of plant proteins in diet for seabass (Lates calcarifer)
1995
Juadee Pongmaneerat | Mali Boonyaratpalin (National Institute of Coastal Aquaculture, Songkhla (Thailand))
Use of soybean meal and corn gluten meal as substitution of fishmeal in diet for seabass (Lates calcarifer) was evaluated. Soybean meal and corn gluten meal at ratio of 5:3 were used to replace fish meal in the control diet at levels of 25 percent, 50 percent, 75 percent and 87.5 percent in diet 2, 3, 4 and 5, respectively. Five diets containing 37 percent protein were formulated to be iso-nitrogenous and iso-caloric. Four replications of fish with initial body weight of 0.9 g were fed each diet for 10 weeks to satiation leavel. Growth, feed gain ratio and protein efficiency ratio of fish fed diet with 25 percent replacement of fish meal were similar to the control diet. While the 50 percent fish meal replaced diet gave the comparable feed gain ratio but showed lower weight gain than that of control diet, due to the lower feed intake. However, replacement of fish meal at 75 percent and 87.5 percent significantly reduced growth and feed performances. The lowest survival and protein digestibility were observed in fish fed 87.5 percent fish meal replaced diet. Therefore, it was suggested that soybean meal and corn gluten meal can be used, respectively, at levels of 17 percent and 10 percent in diet (50 percent replacement of fish meal). Higher inclusion of these two plant protein meals significantly reduced growth and feed performances in seabass.
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