Fecundity Variation of Labeo rohita (Hamilton, 1822) in Lentic Freshwater Systems in Purnea District, Bihar, India

The appropriateness of any fish species for successful culture and seed production depends upon proper growth reproduction and it also needs strong management. The present study was conducted to investigate the fecundity (Egg laying capacity) of an Indian Major Carp, Labeo rohita (Ham) in pond condition in district Purnea, Bihar. Female brood fishes were identified and purchased from permanent fishermen. Fishes were dissected out and fecundity was estimated by using standard technique and formula. Length and body weight of the fishes were measured systemically. Average mean of length and weight of fishes was recorded as 39.28 (±0.39) cm and 800.8±52.59 gm respectively. Mean weight of the ovaries was found around 158.05±13.80 gm. The absolute fecundity was also determined of the selected fishes. The absolute fecundity was 135192 which ranged from 114047 to 166549. The fecundity of Labeo rohita was found to be increased with the increase of ovary weight. The highest fecundity was seen in the month of June in compared to other three months. Ovary weight has been considered as a better index to measure the fecundity of fish species as depicted by the present investigation.