Amino Acid Composition Of Three Species Of Nigerian Fish: Clarias Anguillaris, Oreochromis Niloticus And Cynoglossus Senegalensis

摘要

An investigation into the concentrations of amino acids in three species of Nigerian fish: Clarias anguillaris,Oreochromis niloticus and Cynoglossus senegalensis was carried out.The most abundant amino acid was Clu (108-118 mg/g crude protein) and Leu was the most abundant essential amino acid (58.0-64.7 mg/g crude protein).While total amino acid content was 618-637 mg/g crude protein,the total essential amino acid content was 300-317 mg/g or 48.6-50.0% with His but 283-299 mg/g crude protein or 45.8-47.0% without His.The limiting amino acid was Thr for C.anguillaries and C.senegalensis but Val for O.niloticus whereas Phe + Tyr scores were greater than 1.0 (1.06-1.21) in all the fish samples.Significant differences existed between the contents of essential amino acids and non-essential amino acids at p＜0.05 in all the fish samples.Percentage contents of total neutral amino acids ranged from 52.2-54.9%; for total acidic amino acids the range was 26.9-29.6% and for total basic amino acids the range was 17.7-18.2%.