author(s)
A Rajbongshi, A Ali, M Chakravarty, M Deka, H Mazumdar and S Baishya

abstract
A study was conducted to evaluate the effect of Ovaprim on induced breeding of Magur (Clarias batrachus) in FRP hatcheries H-1, H-2 and H-3 installed in three farms of Nalbari district, Assam for survival of magur larvae. The Ovaprim hormone was found to be efficient in breeding operations of the hatcheries in dose combinations as 1.35±0.15, 1.95±0.15 and 1.16±0.17 used in H-1, H-2 and H-3 respectively. It was obvious that the average relative fecundity, body weight and ovulation percentage in H-2 hatchery were higher compared to H-1 and H-3 which is mainly due to proper feeding and nutrition. The highest % normal larvae was observed in H2 hatchery which was 67.72±13.01 which is due to the effect of different doses of Ovaprim during induced breeding of Magur. The study revealed that FRP hatcheries can be a potential tool for induced breeding and quality seed production of Magur.