The artificial reproduction technology of carp

Rouge fish commonly known as burned oysters, yellow row and so on. It is mainly distributed in China's Yangtze River and Lancang River regions. It is a unique endangered species of fish in China and has high economic value and academic research value. It is listed as a national Grade II protected animal. The shape of the rouge fish is unique and its color is distinctive. In particular, the juvenile fish is unique in appearance and colorful in color. Its dorsal fins resemble sails. They swim quietly. The rouge has large individuals, fast growth, gentle tameness, wide appetite and strong resistance to diseases. It is both ornamental and edible. The excellent breeds have won the Silver Award at the Singapore International Wild Ornamental Fish Fair. The full artificial reproduction technique of the pond is now described as follows: Artificial propagation techniques 1. Collection and cultivation of broodstock The genus of mullet is currently very rare and broodstock can only be collected from artificially cultivated groups. The criteria for selecting broodstock are: males older than 5 years old and females older than 7 years old; full-bodied, robust, full scales without disease; 7-8 kg weight is preferred. Before the broodstock goes to the lower pool, it is briefly bathed with salt or potassium permanganate solution. Usually, about 0.06 hectares of broodstock is reared at a weight of about 7-8 kg per 0.067 hectare. It can be used with about 100 tails of large size bream and bream. The feed is mainly leeches, and some animal protein side materials such as fish gills, snail meat, earthworms, and mealworms are supplemented in small quantities. The amount of feed should be controlled about 20 days before spawning to avoid over-fertilization in the broodstock production season. Daily management must pay great attention to water quality regulation and disease prevention. 2, artificial oxytocin and incubation 1 oxytocin. The breeding period of rouge fish is about 20 days before and after the convulsion to the vernal equinox. The mature standard for broodstock is: the male fish gently presses the abdomen with milky white semen and flows into the water. The abdomen of the female fish is swollen and the eggs excavated with an egg digger are neat, plump and scattered, with a diameter of more than 2 mm. Male to female ratio is 1:1 or 1:2. Usually use a variety of mixed hormone injections, the dose is: females per kg injection LRH-A 10-70 micrograms, HCG500-2000IU, DOM 2-6 millitons, plus a small amount of pituitary, male dose halved. Well-proven broodstock can be injected at one time, and it is advisable to start with a low-dose and then a high-dose, which is divided into two or three injections, with a 24-hour interval between injections. Pro-fish always have appropriate water stimulation during production. 2 Insemination and incubation. After 20 hours of injection of the last needle of the cod fish oxytocin, it takes about half an hour to inspect it and find that the eggs should be artificially squeezed and inseminated immediately. Generally, it takes 3-4 times before hatching. The fertilized eggs can be inflated in the aquarium by hydrostatic hatching; they can also be incubated in the microfluidic water in the hatching tanks; they can also be hatched in the hatchery tanks in aeration, and the best results are obtained in the last method. In the pre-hatch period, eggs are soaked daily with a disinfecting solution for about 10 seconds to prevent waterborne mildew. On the day of filming, drug use should be stopped to avoid injury.

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