2. Materials and methods
2.1. Experimental diets
Using white fish meal, soybean meal and wheat gluten meal as main
protein sources, fish oil and soybean oil as main lipid source, nine
isonitrogenous (50% crude protein) and isolipidic (12% crude lipid)
practical diets were formulated to contain 26.38%, 35.18% and 43.73%
soybean meal as replacement of 30%, 40% and 50% fish meal protein