1. The source of the broodstock is the fine-skinned summer fish species introduced from the state of Parana, Brazil. After three years of pond feeding and wintering in the greenhouse, broodstock are grown into sexually mature broodstock. Some broodstock from the offspring can also be selected to grow into broodstock.
2. The broodstock used for broodstock selection must be bred from the fine-scale tick population cultivated in monoculture ponds. Individuals who have achieved sexual maturity, good growth performance, and no physical injury should be selected as broodstock. The weight requirements of the broodstock: the female fish amounted to more than 4 kg and the male fish amounted to more than 3 kg. The average age is 3-7 years old. The broodstock that meets the above conditions has excellent reproductive conditions, and has a high rate of inducing rate, fertilization rate, and hatching rate. The broodstock should be optimized by year-by-year elimination.
2. The broodstock used for broodstock selection must be bred from the fine-scale tick population cultivated in monoculture ponds. Individuals who have achieved sexual maturity, good growth performance, and no physical injury should be selected as broodstock. The weight requirements of the broodstock: the female fish amounted to more than 4 kg and the male fish amounted to more than 3 kg. The average age is 3-7 years old. The broodstock that meets the above conditions has excellent reproductive conditions, and has a high rate of inducing rate, fertilization rate, and hatching rate. The broodstock should be optimized by year-by-year elimination.
Ningbo Cland Medical Instruments Co., Ltd. , https://www.ruipumedical.com