Propagation, proximate and fatty acid compositions of rotifer Brachionus plicatilis fed on yeast cultured in sea water containing liquid from mackerel waste juice

Rotifer was fed on yeast (WY) cultured sea water containing liquid from mackerel waste juice, and its growth was compared with rotifer fed on commercial baker's yeast (BY). Furthermore, proximate and fatty acid compositions of rotifer reared with WY yeast were compared with those of rotifer reared with BY yeast, ω-yeast (ωY) or marine chlorella. A similar density and harvest of rotifer were obtained by cultivation with both WY and BY yeasts. Rotifer fed on WY yeast showed higher ash content than that of rotifer fed on BY yeast, ω-yeast or marine chlorella, but similar moisture, protein, and lipid contents to the groups fed on BY yeast and marine chlorella. On the other hand, rotifer reazed with ω-yeast showed high lipid and low protein contents as compared with those of rotifer reared with WY yeast, BY yeast or marine chlorella. The percentage of ω3 HUFA in total fatty acids of lipid from rotifer reared with WY yeast was similar to that of BY group, but lower than that of ωY and marine chlorella groups.