Though Common carp is one of the most widely cultured species in Nepal, there is insufficient supply of fry and fingerlings of common carp. Therefore, the study was conducted with the objective to observe the breeding performance, survival and growth of common carp. Two consecutive experiments were conducted during February to May 2020. First experiment was conducted in four nursery ponds having same area (30m×17m) to observe the breeding performance and growth of hatchlings. 24 kakabans were kept in each pond and brood females and males were released in each pond in a ratio of 1:2 (female: male) i.e. 7 female and 14 male. Each brood fishes were injected with Luteinizing Hormone Releasing Hormone (LHRH A 2 ) @ 2µg/kg body weight for female and @ 1µg/kg body weight to male for induced breeding of common carp. The experimental duration was of 36 days. Second experiment was also conducted in 4 nursery ponds having same area (30m×15m) to observe the survival of fry and the experimental duration was of 50 days. There was no significant difference in water quality parameters (p>0.05) and feeding among the research ponds during the culture period. Water quality parameters were measured on weekly basis. Periodic samplings were done to evaluate the daily weight gain, specific growth rate, survival rate and change in water quality parameters. The average weight gain, daily weight gain and specific growth rate of hatchlings were 0.54 g, 0.02 g/fish/day and 12.16%/day respectively. Similarly the average weight gain, daily weight gain and specific growth rate of fry were 20.43g, 0.41g/fish/day and 7.32%/day respectively. And the average survival rate of common carp fry in fish farm of Dhanusha was 47% at stocking density of 56, 000/ha. Through induced breeding process, the average number of fry produced from 7female having average total weight 19 kg and 14 male having average total weight 28 kg was 1, 38,750.

中文翻译：

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尼泊尔Dhanusha地区鱼类的鲤鱼繁殖性能，成活率和生长性能的研究

尽管鲤鱼是尼泊尔养殖最广泛的物种之一，但鲤鱼的鱼苗和鱼种供应不足。因此，本研究旨在观察鲤鱼的繁殖性能，存活率和生长。在2020年2月至2020年5月之间进行了两次连续实验。第一次实验是在具有相同面积（30m×17m）的四个育苗池中进行的，以观察孵化场的繁殖性能和生长。每个池塘中饲养24只kakaban，每个池塘以1：2（雌：雄）的比例释放雌性和雄性，即7个雌性和14个雄性。向每只亲鱼注入黄体化激素释放激素（LHRH A 2），雌性为2μg/ kg体重，雄性为1μg/ kg体重，以诱导鲤鱼的繁殖。实验时间为36天。在面积为30m×15m的4个育苗池中还进行了第二次实验，观察鱼苗的存活情况，实验持续时间为50天。在养殖期间，研究池塘之间的水质参数和摄食没有显着差异（p> 0.05）。每周测量水质参数。定期取样以评估每日体重增加，比生长率，存活率和水质参数的变化。幼鱼的平均增重，日增重和比生长率分别为0.54 g，0.02 g /鱼/天和12.16％/天。同样，鱼苗的平均增重，每日增重和鱼的比重增长率分别为20.43g，0.41g /鱼/天和7.32％/天。放养密度为56 000 / ha时，Dhanusha养鱼场的鲤鱼平均成活率为47％。通过诱导育种过程，平均总重量为19千克的7头雌性和平均总重量为28千克的14头雄性产生的鱼苗平均数量为1，38,750。