Effect of replacing fish meal and soybean meal by sweet lupin supplemented with methionine in diets on the produvtive performance of blue tilapia fish (Oreochromis aureus) [electronic resource].

Includes reference.

In an experiment carried out in the fish wet lab of the Faculty of Agriculture, Ain Shams University. 360 fish fingerlings (Oreochromis aureus) with an average initial weight of 3g/fish were used. The fish were randomly distributed in 18 twenty liter fiberglass tanks (20 fish each). The tanks were a part of closed system provided with biological and mechanical filters to keep constant water quality in all tanks. Water temperature was kept constant at 270 C throughout the experimental period (8 weeks) by an electrical thermo regulated heaters (4kW). Six experimental diets were formulated to contain 31% crude protein and 4150 cal gross energy/kg, where diet 1 (control) contains fish meal and soy bean meal as a main sources of protein in the diet. In the second diet, soybean meal protein was replaced by sweet lupin protein to test the effect of replacing soybean meal by sweet lupin, and diets 3, 4, 5 and 6 were designed to include only plant protein sources (soybean meal and sweet lupin) supplemented with 0, 0.3, 0.6 or 0.9 % DL-methionine, respectively.

Summary in Arabic.

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