Induction of triploidy was very effective in producing sterile fish, as has been
reported in some species of cyprinids such as grass carp,and common carp preliminary study conducted by Na-Nakorn and Legrand 1992. indicated that cold
shock of 158C applied immediately after activation and lasting 10 or 15 min, induced
more than 90% triploidy in Thai silver barb, but hatching rate was low. Thus, the cold
shock conditions have not been optimized for Thai silver barb and the study on the
performance of triploid fish still needs to be assessed.