For most of the vitamin, clinical symptoms of deficiencies are difficult to recognize or are not manifested externally.
The estimated dietary quantitative for vitamin C to be approximately 60-150 mg/kg.
There is a little information on vitamins A and C. Most of the B group vitamins are needed by Macrobrachium rosenbergii , plus C and E.
The precursor of A may be needed but not the vitamin itself, e.g. carotene in phytoplankton can serve as a source of synthesis of A.
Just like in fishes the primary sign of vitamin deficiency in Macrobrachium rosenbergii are poor growth and high mortality rate.
Macrobrachium rosenbergii most probably obtain a portion of their vitamin requirements from the nutrients of the pond.
However normally vitamins premixes used in Macrobrachium rosenbergii diets vary widely. The application of vitamin to diets without prior knowledge of requirements may be wasteful. If added in excess vitamin can be toxic or antagonistic in prawn.
Vitamin requirements for Macrobrachium rosenbergii
