The Effects of Seasons and Different Feeds on Fatty Acid Composition in Fillets of Cultured Gilthead Sea Bream (Sparus aurata L.) and European Sea Bass (Dicentrarchus labrax L.) in Turkey

Authors : Mustafa YILDIZ, Erdal ŞENER, Metin TİMUR

Pages : 133-141

View : 21 | Download : 6

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Dietary and seasonal effects on the fatty acid composition in the fillets of sea bream Sparus aurata and sea bass Dicentrarchus labrax were studied. Samples of the fish and feed were taken at 4 fish farms on the Aegean coast of Turkey during the summer, winter and spring seasons of 2004. The 2 commercial pelleted feeds insert ignore into journalissuearticles values(A and C); and 2 commercial extruded feeds insert ignore into journalissuearticles values(B and D); used in the fish farms were analyzed. There were not significant differences among the seasonally fatty acid composition in feed and fish samples except for MUFA insert ignore into journalissuearticles values(monounsaturated fatty acid); in the fillets of sea bream. Sea bream fillets had significantly higher total MUFA concentration in winter samples insert ignore into journalissuearticles values(33.5 ± 1.40%); than summer insert ignore into journalissuearticles values(32.0 ± 0.37%); and spring insert ignore into journalissuearticles values(31.8 ± 0.87%); samples insert ignore into journalissuearticles values(P < 0.05);. Predominant fatty acids of all feeds and fish fillets were 14:0, 16:0, 18:0, 16:1n-7, 18:1n-9, 18:2n-6, 20:5n-3 insert ignore into journalissuearticles values(eicosapentaenoic acid, EPA); and 22:6n-3 insert ignore into journalissuearticles values(docosahexaenoic acid, DHA);. The feeds generally had ArA insert ignore into journalissuearticles values(arachidonic acid); level ranging from 0.6% to 0.9% of the total fatty acids. Fatty acid composition in fish fillets generally reflected the fatty acid composition of the feeds. The changes in fatty acid composition of the fillets indicate that the MUFA were probably dispensable for sea bream and sea bass. EPA, DHA and ArA levels in the commercial feeds were adequate for both fish species. The results of this study indicated that both fish species were as a good source of n-3 HUFA in different seasons.
Keywords : Gilthead sea bream and European sea bass, different feeds, Seasonal effect, fatty acids in fillet