Ooni tilapia seed production technology

The breeding pond can be a cement pond or an earth pond. The area of ​​the cement pond is about 100 square meters, and the area of ​​the earth pond is between 1 mu ~ 3 mu. The selected broodstock should have obvious species characteristics and sexual characteristics, strong physique, normal color, thick body and high back. 1.The edge of the dorsal fin of Nile tilapia is black, the throat and chest are light brown, the lower half of the body is white, and there are D: XVI～XVII, 12～13 Anal fin A: 2.Olia tilapia has a red edge on its dorsal fin, a gray-white throat and chest, and a dark purple-gray vertical band on the side of the body9~D: XV～XVI, 11～13 Anal fin A: Hybrid breeding can be carried out when the water temperature rises above 22℃ every spring. Hot spring water or factory waste water can also be used to increase the water temperature to carry out cross breeding earlier. After selecting the broodstock, soak and disinfect the broodstock in 3% salt water, and then put it into the breeding tank for natural cross-breeding.
Generally, seedlings begin to appear 20 days after the parent fish enter the pond. If seedlings are found, use a soft quilt net to catch 2 times ~1.Preparation work before stocking the seedlings. The seedlings are cultivated in a special seedling cultivation pond, and 20 days~3 days later, the seedling cultivation tank begins to be filled with new water to a depth of 60cm, and fermented cow manure, pig manure or chicken manure 300kg/mu ~ 400kg/mu is used as base fertilizer to cultivate water quality. In daily management, we should insist on patrolling the pond every morning and evening, pay attention to fish activities and changes in water quality, regulate the water quality, and keep the water quality " fat, lively, tender and refreshing".