Effect of dietary protein level on caged catfish Clarias lazera, raised under different stocking rates [Egypt]
1986
Hassouna, M.M.E. (Cairo Univ., Fayoum (Egypt). Faculty of Agriculture) | Ishak, M.M. | Omer, E.A. | Shahat, T.
Catfish fingerlings Clarias lazera, averaging 97.9 7g in weight and 18.7 09 cm in length were alloted to 12 treatments in duplicates using 24 floating cirular cages. The treatments were arranged to contain four levels of dietary protein (20, 25, 30 and 40% cp) and three stocking rates of fish (50, 100 and 200 fish/m) in 4x3 factorial design. The fish per cage were maintained in 0.2 m' Nile water from the start of June to August 5. Fish performance, carcass traits and simple economic evaluations were performed. The result revealed that the 20% CP diet was more efficient than the 25, 30 and 40% CP diets regarding fish performance, carcass traits and feed cost per one kg fish or its flesh. As the stocking rate increased as fish performance and carcass traits decreased. However, the net revenue per cage increased to about 4 folds as a result of increasing fish stocking rate from 50 to 200 fish/m'
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