Shol・tCbmmunication The Fatty VariationAcid Composition Characteristic of Docosahexaenoic Acid Contentof a Highly Migratory Fish , with Seasonal in Lipid of Bonito ( Eutdynnus pelamis )

Studies of lipids of marine organisms show that fish and shellfish can be a unique source of n-3 polyunsaturated fatty acids such as icosapentaenoic a id (EPA) and docosahexaenoic acid (DHA), otherwise not provided by terrestrial oils,`) but, the amounts ofDHA in their lipids differ grcatly with species as well as the season. The usual variation of fatty acid composition is considered to be the result of