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The utilization of l - ascorbic acid in catfish diets cultured at different stocking densities [electronic resource].

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Sayed, S. H

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Language: English Summary language: Arabic Description: p.2755-2764Other title:

الاستفادة من حمض الاسكوربيك فى علائق القراميط النيلى المستزرعة بكثافات مختلفة [Added title page title]

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Mansoura University journal of agricultural sciences, 2006 v. 31 (5) [electronic resource].

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In: Mansoura University Journal of Agricultural Sciences 2006.v.31(5)Summary: A 14 weeks growth trial was conducted in Central Laboratory for Aquaculture Research. Abbassa to estimate the adequate L- ascorbic acid (A.A) requirement of catfish (Clarias gariepinus Burchell) diets and its effect on the growth rate, feed utilization, concentration of AA in fish tissues and chemical composition of whole fish. A.A supplemented at 50, 100, and 150 mg / Kg - purified diet, respectively. Each diet was fed to triplicate groups with initial average body weight of 150.55g /fish. Fish were stocked at 20 and 30 fish/m³ within the three vitamin C levels. Results indicated that, the adequate dietary A.A concentration for optimum growth of catfish was 100 mg/kg diet, and the highest growth rate, feed utilization, chemical composition of fish at lower stocking density (20 fish/m³). It could be concluded from the present study that, the optimum concentration of vitamin C in catfish diet was 100mglkg which gave the highest growth rates with no clinical signs at low or high stocking densities (20 or 30 fish/m³ , i .e .3 - 4.5 g fish/ I) .

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A 14 weeks growth trial was conducted in Central Laboratory for Aquaculture Research. Abbassa to estimate the adequate L- ascorbic acid (A.A) requirement of catfish (Clarias gariepinus Burchell) diets and its effect on the growth rate, feed utilization, concentration of AA in fish tissues and chemical composition of whole fish. A.A supplemented at 50, 100, and 150 mg / Kg - purified diet, respectively. Each diet was fed to triplicate groups with initial average body weight of 150.55g /fish. Fish were stocked at 20 and 30 fish/m³ within the three vitamin C levels. Results indicated that, the adequate dietary A.A concentration for optimum growth of catfish was 100 mg/kg diet, and the highest growth rate, feed utilization, chemical composition of fish at lower stocking density (20 fish/m³). It could be concluded from the present study that, the optimum concentration of vitamin C in catfish diet was 100mglkg which gave the highest growth rates with no clinical signs at low or high stocking densities (20 or 30 fish/m³ , i .e .3 - 4.5 g fish/ I) .

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