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Title: Variation of Amino-Acid Composition in Clariasgariepinus and Oreochromis niloticus Cultured in Semi-intensive Fish Tank
Authors: OKONJI, V. A.
Keywords: Fishes
proximate analyses
Oreochromis niloticus
Clarias gariepinus
Issue Date: 2011
Publisher: AQUAFIELD
Series/Report no.: 7;8
Abstract: The proximate and amino-acids composition of the two commercially important freshwater species (Clarias gariepinus and Oreochromis niloticus) cultured under semi-intensive system were determined. Cultured fish specimen was harvested and dried in an oven at temperature of 105oC and taken to the laboratory for analyses. The chemical composition of the fish samples was determined using AOAC methods. The mean contents of protein, moisture, ash and fibre of Clarias gariepinus and Oreochromis niloticus was 60.45% and 60.17%, 12.48% and 12.74%, 3.56% and 2.54%, 1.13% and 0.52% respectively. No significantly difference was noted (P>0.05) between the fish species in these parameters. The mean fat content was significantly higher (P<0.05) for Clarias gariepinus (19.68%) than for Oreochromis niloticus (14.40%). Amino-acids composition from fish sample protein in C. Gariepinus ranged from 0.6859 to 0.7631g/100g and that of Oreochromis niloticus ranged from 0.6300 to 0.6688g/100g. Thus C. gariepinus had higher levels of amino acid than O. niloticus. The most abundant amino-acids in the two fish were Glutamic acid. Aspartic acid, and Leucine. Least amino-acids recorded were Tryptophan and Histidine. The two freshwater fish species contain nine essential amino-acids for body maintenance, improving good health and growth. They include Arginine, Lysine, Methionine, Leucine, Phenylalanine, Threonine, Tryptophan, Histidine and Valine. Pond raised fish were therefore recommended as a rich dietary source of fat, protein and the essential amino-acids for human consumption. However, C. gariepinus was identified to be richer in amino acids.
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