Seasonal Variation of amino acid in the muscles of Labeo rohita

Fish protein is referred to as quality protein which is being rich in essential amino acids with a high digestibility value. Fish muscles are the cheapest source of animal protein with amino acids which are required in human diet for good health. The present study is aimed to find out seasonal variations in essential and non-essential amino acids in the muscles of a local fresh water fish Labeo rohita. The seasonal categories used were: Winter, Pre-monsoon, Monsoon and Postmonsoon. It was found that among the essential amino acids, the level of Phenylalanine, Lysine, Leucine, Arginine, Valine, Isoleucine, Histidine, and Tryptophan were at their highest level in monsoon season while the level of Threonine and Methionine were at maximum level in premonsoon season. Among the non-essential amino acid, the level of Glutamic acid, Aspartic acid, Tyrosine, Alanine, Proline and Serine were maximum in monsoon season while the level of Cysteine was maximum in winter season.