3.6.2. Techniques for vitamin C enrichment
The vitamin C content of rotifers reflects the dietary ascorbic acid (AA) levels both after
culture and enrichment (Table 3.6.).
For example, rotifers cultured on instant baker’s yeast contain 150 mg vitamin C/g-1 DW, while for Chlorella-fed rotifers contain 2300 mg vitamin C/g-1 DW.
Within commercial marine fish hatcheries a wide range of products are
used for the culture and subsequent boosting of rotifers (Table 3.6.).
In general commercial-scale enrichment is scoring lower than laboratory enrichment.
Problems of operculum deformities currently occurring in Mediterranean gilthead seabream hatcheries might be related to the changes in live food production management and reduced vitamin
C levels.