PARTIAL AND COMPLETE REPLACEMENT OF FISH MEAL WITH SOYBEAN MEAL IN DIETS OF NILE TILAPIA (OREOCHROMIS NILOTICUS) AND MULLET (MUGIL CEPHALUS) REARED IN POLYCULTURE SYSTEM.
Abdel Monem M. Yones.
Abstract
Production of Nile tilapia (Oreochromis niloticus) and mullet (Mugil cephalus) as affected with dietary protein source in polyculture system was compared. Four experimental diets were formulated to contain (25.3±0.16) crude protein. Diet 1 was free from soybean meal, while fish meal was replaced at 50, 75 and 100 % levels with soybean meal in diets 2, 3 and 4, respectively. The dietary treatments were carried out in 4 earthen ponds each of total area of 5 feddans (2.1 ha). The diets were offered at 3% rate of body weight (B.W), at two times a day. The ponds were prepared and fertilized by 1200kg/h chicken manure, 150 kg/h super phosphate and 60kg/h urea. The growth performance parameters was significantly different (p
Key words: Diet; Fish meal; Soybean meal; Polyculture; Oreochromis niloticus; M cephalus.
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