Technical points: Vallis yellow sturgeon is native to dry and tributaries of the Yangtze River and is a high-quality, high-grade fish.
1, broodstock cultivation: 2-3 acres of pro-fish ponds, fresh water, drainage and irrigation facilities. Each mus of 100-125 kilograms of broodstock, 150 grams of females and 350 grams of males. Regularly feed broken pieces of fish and pay attention to frequently changing oxygen.
2, artificial reproduction: breeding season, select the gonads developed a good broodstock, divided into two injection of high efficiency oxytocin mixture, flushing, induced spawning. Once the effect time is up, the broodstock will be inseminated artificially. The fertilized eggs adhere to the hatchery stencil and the water is inflated and hatched.
3, seed cultivation: the first hatchling fry in a small cement pool or a small cage, with egg yolk slurry to eat. Afterwards, animal feeds such as rotifers, branches and copepods were fed. When the fry grows to 1.5cm, the lower earth pool is cultivated according to the conventional method and fed with refined artificial compound feed or fish paste.
4, adult fish farming: pond main support: put 6-8cm species of 2500-3000 tail per acre, take flowers, white bream species 250. Ponds store 1.5-2m of water to keep the water fresh. It is fed with special compound feed or mash and feed. Carefully raised for the first anniversary, adult fish size up to 150-400 grams; cage culture: fish reared per square meter of fish cages 6-8cm fish species 200-300 tail, feeding specialized feed, or quail, cockroach feed, Or fish, conventional management, the first anniversary of breeding can reach 150-400 grams of high-quality commercial fish specifications.
Wartfish stingrays are not tolerant of hypoxia and require slightly higher dissolved oxygen requirements than the four major fishes. It is more sensitive to trichlorfon and malachite green fishery medicine. Therefore, it is necessary to do a good job in water quality management and prudent pesticide application.
The main technical and economic indicators: The pond is mainly cultivated with stingray, which can reach 250-350 kilograms per mu. According to the current market price of 24 yuan/kg, the output value is about 6000-7000 yuan, which is higher than the current conventional breed breeding per acre. Increase income from 1000-2000 yuan.
Appropriate demonstration and promotion scope: Vallissula is a wide temperature, animal and omnivorous fish, suitable for the promotion of breeding in the province's entire province. As long as the water is fresh and pollution-free ponds, lakes and reservoirs, it can be cultivated or released.
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