Early ontogenic development of the fatty acid composition in seabass (Dicentrarchus labrax) eggs and juveniles from captive broodstocks

Authors : Serap Tan, Musa Bulut, Soner Bilen

Pages : 5-9

View : 17 | Download : 8

Publication Date : 2014-07-24

Article Type : Research Paper

Abstract :In the present study, effects of different diets on the fatty acid composition of hatched seabass insert ignore into journalissuearticles values(Dicentrarchus labrax); at after fertilization of the egg insert ignore into journalissuearticles values(E);, and yolk sac insert ignore into journalissuearticles values(Y); stages have been investigated. In the study, the fish were fed with Artemia insert ignore into journalissuearticles values(A);, Artemia-microparticulate mix insert ignore into journalissuearticles values(AMD); and microparticulate diet insert ignore into journalissuearticles values(M);. According to the results of the study, the levels of total PUFAs in the total lipid insert ignore into journalissuearticles values(TL); were significantly higher in eggs insert ignore into journalissuearticles values(E); insert ignore into journalissuearticles values(P<0.05); compared to the other groups. 14:1, 15:1, 17:1 and 22:1n 9 and also aracidonic acid and docosaksaneoic acid could not be detected in Artemia but detectable in E and Y groups. During the development stages, polyunsaturated fatty acids insert ignore into journalissuearticles values(PUFA);, arachidonic insert ignore into journalissuearticles values(20:4n6 ArA);, eicosapentaenoic insert ignore into journalissuearticles values(20:5n-3, EPA); and docosahexaenoic acid insert ignore into journalissuearticles values(22:6n-3, DHA); were decreased significantly insert ignore into journalissuearticles values(P<0.05); till the AMD stage. ArA, EPA and DHA were used as energy sources by Dicentrarchus labrax larvae. Total n-3 content showed the highest levels at the AMD stage, which was followed by the M, E, Y and A stages, respectively. EPA/DHA ratio was the highest in the AMD group insert ignore into journalissuearticles values(P>0.05);. In the study, seabass fatty acid composition at different growth stages was affected by diet composition. After feeding stage especially in the AMD and M groups, essential fatty acids were provided from diets.
Keywords : Eggs, Fatty acids, Larvae, Total lipid, Yolk sac stage, Seabass