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Effect of dietary protein and lipid levels and protein–energy ratio on growth indices, feed utilization and body composition of freshwater prawn, Macrobrachium rosenbergii (de Man 1879) post larvae
Author(s) -
Goda Ashraf M AS
Publication year - 2008
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2008.01947.x
Subject(s) - macrobrachium rosenbergii , prawn , biology , protein efficiency ratio , zoology , feed conversion ratio , composition (language) , factorial experiment , macrobrachium , food science , body weight , decapoda , fishery , crustacean , endocrinology , linguistics , philosophy , mathematics , statistics
A grow‐out experiment was designed to determine the effect of different dietary protein, lipid levels and protein–energy (P:E) ratio on growth performance and feed utilization of the freshwater prawn, Macrobrachium rosenbergii post larvae (PL) culture in pond net enclosures (hapa, 3.75 m −3 each) for 12 weeks (84 days). The experimental treatments were assigned in triplicate. Six test diets were formulated to contain three different protein levels (300, 350 and 400 g kg −1 diet) and two lipid levels (100 and 140 g kg −1 diet) in a factorial manner (3 × 2) to provided six different dietary P:E ratio: 16, 17, 18, 19, 20 and 21 mg CP kJ −1 g −1 ). The result showed that the highest significant ( P ≤0.05) survival rate, growth indices and feed utilization were observed for M. rosenbergii PL fed a diet with a P:E ratio of 17 mg CP kJ −1 g 1 , whereas, the lowest value was recorded for prawns fed a diet with a P:E ratio of 20 mg CP kJ −1 g −1 . Whole body contents of protein and lipid were highest ( P ≤0.05) when fed diets with 21 and 17 mg CP kJ −1 g −1 respectively. Concerning dietary protein levels, the highest ( P ≤0.05) values for survival and growth indices were observed for PL fed a diet containing 300 g kg −1 diet protein. The same trend was observed for PL fed a diet with 100 g kg −1 diet lipid level, irrespective of dietary protein levels. A diet containing 300 g kg −1 protein and 100 g kg −1 lipid with a dietary P:E ratio of 17 mg CP kJ g −1 is recommended to stimulate growth performance and nutrients utilization efficiency of M. rosenbergii PL.