Dietary Zinc and Cobalt Requirements of Fry of Seabass (Lates calcarifer) and Catfish (Clarias batrachus)
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2011
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Israeli Journal of Aquaculture - BAMIGDEH
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Abstract
An 8-week experiment was conducted to determine the cobalt and zinc requirements of fry of seabass (Lates calcarifer) and catfish (Clarias batrachus). Fifteen diets for each fish were formulated with varying concentrations of cobalt and zinc, alone and in combination. The control diet was not supplemented with cobalt or zinc. The diets for L. calcarifer had 45% protein, while the diets for C. batrachus had 30%. The diet that produced the best growth for L. calcarifer (1100%) contained 2.5 mg Co + 45 mg Zn/kg diet and for C. batrachus (1149%) contained 5 mg Co + 30 mg Zn/kg. Growth in the control L. calcarifer was 738% and in the control C. batrachus was 428%. For both species, the food conversion ratios were best in the above diets, 1.17±0.52 for L. calcarifer and 1.40±0.62 for C. batrachus as opposed to 1.89±0.39 and 2.54±0.61 for the respective controls.
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Keywords
Lates calcarifer, Clarias batrachus, cobalt, zinc, diet, Fish culture--Israel--Periodicals., Fish culture--Periodicals., Aquaculture--Israel--Periodicals., Aquaculture--Periodicals.
Citation
P.H. Sapkale and R.K. Singh (2011). Dietary Zinc and Cobalt Requirements of Fry of Seabass (Lates calcarifer) and Catfish (Clarias batrachus). The Israeli Journal of Aquaculture - Bamidgeh, 63, 6 pp.
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6 pages
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