Abstract

This study aimed to determine the proximate composition and fatty acid profile of edible tissues of Capoeta damascina reared in freshwater and brackish water. The Juveniles of freshwater originating C. damascina were acclimated to brackish water of different salinities (6, 12, and 24g/l); and grown in same conditions as their counterparts in freshwater. Increase in salinity led to higher moisture and lower lipid content (P<0.05) in muscle, but had no marked impact (P>0.05) on proximate composition of liver. In both tissues, the contents of total polyunsaturated fatty acids (PUFAs) and n-3 PUFAs were significantly (P<0.05) increased, while the content of total monounsaturated fatty acids (MUFAs) was significantly decreased (P<0.05) by increase in salinity. The contents of eicosapentanoic acid (EPA, 20:5 n-3), docosahexanenoic acid (DHA, 22:6 n-3), and arachidonic acid (20:4 n-6) were significantly increased (P<0.05), while linoleic acid (18:2 n-6) and α-linolenic acid (18:3 n-3) were significantly decreased (P<0.05) by salinity. Considering the contents of fatty acids in 100g of edible portions, fillets of C. damascina reared in 6 and 12g/l salinities as well as freshwater group were good sources of n-3 PUFAs particularly EPA and DHA.

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