with the fish fed on control diet containing fish meal as the protein source. ... tion of fish meal in the diets of various ..... Booth, M.A., G.L.Allan, J.Frances and S.
Indian J. Fish., 50(4) : 509-518, Oct.-Dec., 2003
509
Effect of replacement of fish meal with processed soybean on growth, digestibility and nutrient retention in Mugil cephalus (Linn.) fry ALOK KALLA, S.K.GARG, C.P. KAUSHIK*, A.R.T.ARASU** AND G.S. DINODIA Department of Zoology and Aquaculture, Laboratory of Aquaculture Management, CCS Haryana Agricultural University, Hisar - 125 004, India *Department of Environmental Science and Engineering, Guru Jambheshwar University, Hisar-125 001, Haryana, India ** Central Institute of Brackishwater Aquaculture (CIBA-ICAR), Chennai
ABSTRACT Mugil cephalus fry were maintained in glass aquaria filled with inland saline groundwater (15 ppt), and fed on one of the ten (1-10) isonitrogenous diets (energy contents 16.43 kJg-1 to 16.83 k Jg-1) formulated with and without supplementing mineral premix and amino acids (MPA). Fish meal was replaced with equal proportion of hydrothermically processed full fat soybean (Glycine max) at four inclusion levels (25, 50, 75 and 100 g kg-1 of diet). Growth performance was evaluated by feeding the fish once only @ 5% BW d-1 maintained under laboratory conditions (LD 12:12 at 200C) for 70 days. Studies have revealed that growth, per cent gain in body weight, specific growth rate (SGR % d1), apparent protein digestibility (APD%), protein effeciency ratio (PER), gross protein retention (GPR) and gross energy retention (GER) increased with increase in the inclusion levels of soybean (upto 75g kg-1 of diet) in comparison with the fish fed on control diet containing fish meal as the protein source. Carcass of such fish also had high contents of protein, fat and energy, while those of moisture and ash contents remained significantly (P
