A STUDY OF VITAMIN-E ABSORPTION IN ROTIFE R AND COD LARVAE AND THE EFFECT OF DHA CONTENT IN ROTIFER FOR COD LARVAE

An experiment was conducted to determine the absorption of vitamin E ( VE, alpha-toc.) in rotifer and cod larvae, and the effect of DHA conte nt in rotifer on the dropsy rate of cod larvae. In this experiment, ro tifers were enriched with dry shark eggs supplemented with different l evels of three types VE, such as DL-alpha-toc. acetate, DL-alpha-toc. free, or D-alpha-toc. free. It was shown that D-alpha-toc. free was ac cumulated in rotifer more efficiently than DL-alpha-toc. free. Cod lar vae can convert DL-alpha-toc, acetate to a free type of VE, but its ab sorption was low compared with the free type of VE. Furthermore, it wa s also found that the occurrence of dropsy rate in cod larvae reduced when the DHA content in rotifer was increased.