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Effects of Different Treatments of Dietary Soybean Meal And Phytase on The Growth And Mineral Deposition In African Catfish Clarias gariepinus

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Author(s): Nwanna, L.C | O.A Fagbenro | A.O. Adeyo

Journal: Journal of Animal and Veterinary Advances
ISSN 1680-5593

Volume: 4;
Issue: 12;
Start page: 980;
Date: 2005;
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Keywords: Treated soybean meal | phytase | African catfish | growth | mineral deposition

ABSTRACT
Aquafeed is a major source of phosphorus (P) that results in eutrophication and pollution of water-ways. This study was conducted to investigate the effectiveness of treatments of dietary soybean mean (SBM) and phytase in improving the growth of African catfish (Clarias gariepinus) and mineral concentration; and in reducing environmental P loadings. SBM was prepared as raw (untreated), oven-dried, cooked, toasted or soaked in water. Same 8000 Units of phytase (Ronozyme P (5000) CT) kg-1 diet was added to each of the differently prepared SBM before mixing with other ingredients to prepare 40% protein diets. Diet 1 contained untreated SBM without phytase; diet 2 contained untreated SBM with phytase; diet 3 had oven-dried SBM plus phytase; diet 4 contained cooked SBM plus phytase; diet 5 contained toasted SBM with phytase, diet 6 had soaked SBM with phytase. The diets were administered to African catfish (7.0?1.09 g) at 5% of their body weight daily in two equal instalments. After 77 days of feeding, results indicate that the mean weight gain (MWG) of fish fed diets 4 and 5 was higher (p

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