Vol. 15 No. 2
Induced breeding of Vietnam koi (Anabas cobojius, Hamilton, 1822) under controlled conditions at Murshidabad district, West Bengal
Author(s): S. PATRA, P. K. PATHAK, A. ROY, A. TALEB, P. S. ROY, A. MAJI AND U. ROY
Abstract: Air-breathing fish culture is an age-old practice but at present these high value fishes are commercially culture in different area of West Bengal. Vietnam koi, a new variety of exotic koi, native to Vietnam getting tremendous popularity in different parts of West Bengal due to its quick increase in body weight. Murshidabad Krishi Vigyan Kendra under take programme on popularization of new breed air-breathing fish through demonstration programme during 2014 to 2015. By culturing this species farmer’s were getting 150g to 200g body weight within 3-4 months and the market price of was Rs. 250-300 per kg. Realizing the huge demand of quality fish seed, KVK Murshidabad successfully under took the breeding programme of this species at KVK farm. In this breeding programme gonadoprim hormone used as inducing agents in different doses i.e. 0.25ml, 0.30ml, 0.35ml kg-1 of body weight for male and 0.35ml, 0.45ml, 0.50ml kg-1 of body weight for female. Among the different doses 0.45 ml kg-1 of body weight for female and 0.3 ml kg-1 of body weight for male was observed as the minimum effective dose of gonadoprim hormone. Relative fecundity of Vietnam koi was recorded 80000-100000 nos. of egg kg-1 body weight of female, fertilization rate was 90- 95% and hatching rate was 85-90 % in 28-290C temperature in hapa under cemented tank. The spawn were reared in nursery pond using hapa where 70-80% survival rate of larvae was recorded.
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