China's vast inland waters, numerous lakes and reservoirs, about 9.5 million hectares, and most of the water quality is excellent, bait resources are very rich, suitable for the development of silverfish, since 1979, Yunnan Dianchi transplantation of Lake Taihu new silverfish success, rapid promotion in the country, the formation of transplantation boom. Abiotic factors: suitable water temperature 15-17 O C, life cycle temperature 3982-6430 O C, spawning water temperature 0.5-9.6 O C. Transparency 20-350cm, area from 600-6000 ha, water depth 2-15m, substrate with hard bottom, silt, sand and gravel, dissolved oxygen 5mg/l or more, PH 6.5-9.2, alkalinity 1.2-14mg/l, hardness 2.5mg/l or more, alkalinity 1.2-9.2mg/l, hardness 2.2mg/l, alkalinity 1.2-9.2mg/l, hardness 1.2mg/l, hardness 1.2mg/l. 14mg/l, hardness 2.3-7.8mg/l, nitrate 0.056-1.92mg/l, phosphate 0.033-0.15mg/l, silicate 1.22-4.9mg/l.

Biological factors: fish zones are simple, and there are small vacant habitats, especially in the middle and upper layers of the water column can not be too saturated, the level of the general fish monoculture is 12- 250kg/ha is appropriate. 250kg/ha is appropriate, the number of fish species to 12-36 species is good, but also pay attention to sometimes populations, if the zooplankton and small fish and shrimp as the main food of the pelagic fish, may constitute a limitation on the development of silverfish populations. Silverfish body small delicate, swimming ability is relatively weak, the horse mouth fish genus, Gan fish genus and bleak genus and other pelagic ferocious fish, its degree of predation is larger, must be intensity fishing control its number.

Because the Yangtze River silverfish pre-feed on zooplankton, so the water body should have a high biomass, general phytoplankton in 162mg/l, zooplankton in 1.2mg/l or more, small fish and shrimp is the Yangtze River between the silverfish late bait, so it should be protected its resources, to leave the appropriate proportion.

All in all, it is required that the water level of the transplanted waters is relatively stable, the water quality is fresh and pollution-free, the physical and chemical properties are moderate, there are vacant habitats in the ecosystem, especially in the middle and upper water bodies, the zooplankton resources are relatively rich, and the middle and upper layers of the ferocious fishes are relatively few, and there are suitable breeding places. 1、Transplantation of fertilized eggs

(1)Transportation: The fertilized eggs of silverfish in the Yangtze River have strong adaptive ability, and experiments have shown that whether it is oxygenated and sealed transportation, or not oxygenated and open mouth transportation, as well as other modes of transportation can be used. Generally speaking, plastic bags are used to seal and ship the eggs oxygenated and 500,000 eggs are loaded in each bag; or plastic bottles are used to load and ship the eggs, and 100,000 eggs are loaded in each bottle (Coca-Cola bottles), and the density of the eggs is taken into consideration according to the time of transportation. Density, in the process of transportation must pay attention to the temperature difference and try to shorten the time to improve the survival rate.

(2)Placement: The fertilized eggs in the otolith emergence period and the young fish in the internal and external mixed nutrient period can hatch and survive normally under the situation of water temperature dropping 6-8.5 O C. Therefore, the above two phases can be put into the water, because the whole process of embryonic development of the silverfish is carried out under the water, so the place of placement should be chosen to avoid the wind, the sunny shore of the place of 1-2 meters deep, and it is required that the place of placement of the water bottom to the muddy or gravel bottom is good, and the rotifers and other rotifer are not good for the water. The bottom is good, and rotifers and other small bait organisms are more abundant in the cove is the best, to choose the placement point, in order to avoid improper placement caused by the failure of the placement of the first egg bag immersed in the water, assimilation of the temperature, to be the difference in temperature is less than 2 O C, will be fertilized eggs slowly and uniformly poured into the water.

Using the net box incubation, net box specifications are generally 1 × 1 × 0.3m appropriate, easy to operate and manage, with fine gauze or 80 mesh nylon sieve silk cloth production, the upper cover with a sparse mesh cloth to much, to be silverfish fry hatch automatically swim out, put the eggs in the density of generally 500,000 particles / m 2, sunk into the underwater 2m, according to the water quality situation regularly check the development of fish eggs and scrubbing the net box, to avoid oxygen deprivation.

2, adult transplantation

The Yangtze River silverfish due to the body surface scale, a small delicate, the temperature at 20 degrees out of the water quickly die, in order to find out the Yangtze River silverfish live transplantation technology, through the aquaculture company's efforts to practice the technical staff, and finally found an ideal method of fishing and transportation, that is, the low-temperature purse seining fishing and transportation, the effect is very satisfactory, many reservoirs are using this technology to obtain the success of transplantation, and only two years ago, the fish was transplanted to the reservoir. The effect is very satisfactory, many reservoirs are using this technology to obtain successful transplantation, and only two years that is the formation of fishing production.