OMEGA-3-FATTY-ACIDS IN FRESH-WATER FISH FROM SOUTH BRAZIL

Lipid and fatty acid levels in the edible flesh of 17 freshwater fish from Brazil's southern region were determined. Analyses of fatty acid methyl esters were performed by gas chromatography. Palmitic acid (C-1 6:0) was the predominant saturated fatty acid, accounting for 50-70% o f total saturated acids. Oleic acid (C-18:1 omega 9) was the most abun dant monounsaturated fatty acid. Linoleic acid (C-18:2 omega 6), linol enic acid (C-18:3 omega 3), and docosahexaenoic acid (C-22:6 omega 3) were the predominant polyunsaturated fatty acids (PUFA). The data reve aled that species such as truta, barbado, and corvina were good source s of eicosapentaenoic acid (C-20:5 omega 3) and docosahexaenoic acid ( C-22:6 omega 3), and that most freshwater fish examined were good sour ces of PUFA omega 3.