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The chemical compositions of fishes vary and are closely related to feed intake, migratory swimming and sexual changes in connection with spawning. The nutritive composition of many marine, estuarine and fresh water fishes were determined and have been implemented in fish consumption. Nutritive composition of Dussumieria acuta and Sardinella brachysoma were not yet determined and the present study was dealt with these fishes. Fatty acids, Vitamins (fat soluble and water soluble) and Minerals were quantified. Palmitic acid showed its higher level in both species (5.78 and 3.89%) in D. acuta and S. brachysoma, respectively). Water-soluble vitamins were higher in D. acuta and fat-soluble vitamins showed higher percentage availability in S. brachysoma. Calcium was the predominant mineral in both fishes and can be consumed by humans for bone strength. The finding has proved with strong evidence that both the fishes undertaken for the present study are rich in most of the nutrients essential for proper health maintenance of humans.
Parasitic attack commercially important fishes are a matter of great concern. Parasites were collected from the Nagapattinam coastal environment, Southeast coast of India. The concentration of protein in the muscles shows variation among the isopods parasites. The muscle proteins from 5 species of isopods parasites was studied, among the species maximum protein content of 18.26% was observed in Nerocila loveni and the minimum protein content of 3.44% was noticed in Catoessa boscii. After the Sodium Dodecyl Sulphate-Polyacrylamide Gel Electrophoresis (SDS-PAGE), their clear bands were detected in the gel that represents proteins from five species of isopods. The present study reported for the first time that muscles proteins of isopods were isolated and considered for protein quantification and identification.