Culture technology and market prospect of white spot pike

White spot pike, also known as "Soviet rocket", is long, up to 137 cm, with a tip of the kiss. It is mainly distributed in the freshwater basins of North America, Europe and Asia. White spot pike is known as "soft gold in fish". The meat is delicious and delicate, with few spines, and it is a delicacy on the table, but at present, the yield of white spot pike is very low, and as a carnivorous fish, white spot pike is not very good to breed, so it is necessary to deeply understand its living habits and breeding methods before deciding whether to breed it or not. The following pro-agricultural network will introduce the breeding methods and prospects of white spot pike for your reference.

I. Life habits

The growth environment of white spot pike is located in freshwater lakes and rivers in middle and high latitudes. It is a cold water fish, and the optimum growth temperature is 22 ℃ ~ 26 ℃. The seedling stage feeds on zooplankton such as rotifers, small cladocera and copepods, and preys on other fish when they are a little older. When the bait is insufficient, it will cannibalize each other and is a large ferocious carnivorous fish. In natural water bodies, the maximum individual weight can be up to 40 kg. Young fish cluster activities, adult fish scattered foraging, rapid and agile action, often active in the aquatic plants.

2. Fish fry cultivation

The larval length of the white spot pike is 8.5-9 mm when it comes out of the membrane and 11-14 mm when the yolk sac is absorbed, which can be transferred to the fry cultivation stage.

1. Cage cultivation: the size of the cage is 1 × 1 meter, and the depth is 0.3 meters. The cage is nailed around with wooden boards, and the bottom of the box is sealed with 40 mesh mesh. The cage can be placed in a large reservoir to require fresh water quality and high dissolved oxygen content; it can also be placed in a large cement pool to require micro-flow of water and maintain high dissolved oxygen content in the water. The stocking density is 1000 ~ 1500 tails / square meter. Feed zooplankton such as rotifer, small cladocera and copepod, and feed wheat dace seedlings with membrane for 1-2 days as bait. Feed 4 times a day, each time should not be too much, each seedling should put 3-5 fodder fish. White spot pike seedlings are easy to die if they are overfed, so pay attention to observe every time you feed the fish to prevent overfeeding. After about 10 days of cultivation, the fry can grow to 3 cm, which should be divided into boxes and thinning in time.

two。 Cement pool cultivation: the water surface area of the cement pool is 10 × 60 square meters and the pool depth is 0.5 square meters. The stocking density per square meter is 100,150. Feed small zooplankton or other fish seedlings that have just emerged from the film, such as wheat dace. In order to raise seedlings in cement ponds, it is necessary to adjust and change water in time to ensure a high amount of dissolved oxygen in water and adequate feed at the same time. When the body length of the fish reaches 4-7 cm, cannibalism will occur if the feed is insufficient, so the fry with a body length of 3 cm to 5 cm must be moved into large ponds for adult fish culture.

3. Pond cultivation: the pond area is about 1-3 mu, the water depth is 1-1.5 meters, and the water had better be drained and irrigated by itself. 15 days before seedling release, the pond was disinfected with 150 kg quicklime per mu and 250 kg 300 kg of manure was applied to cultivate sufficient zooplankton as open feed. Three days before seedling release, soybean milk made of 2-3 kilograms of soybeans per mu was poured into the pond to ensure that there was enough biological feed for feed fish. One day before fish release, 200000 ~ 300000 wheat dace seedlings per mu were used as feed fish for white spot dog fry. Put 20,000 to 30,000 white spot dog fry per mu and feed them every two days after releasing them. Soybean milk is used as feed fish feed, using 2kg soybeans per mu. When the fry grows to 4.5 cm long, it should be netted and transferred into fish ponds in time.

III. Adult fish culture

1. Pond conditions: an area of 580 mu, water depth of 2 meters, sufficient water sources, self-flow drainage and irrigation to ensure that the water temperature can be lowered in the high temperature season. At the same time, water floating lotus is placed on the surface of the pond as shade, and it is best to plant Chinese fir seedlings and other aquatic plants in the pond as a hiding place to prevent cannibalism. two。 Prepare feed: fish white spot dog fry before going down to the pond to prepare sufficient palatable feed fish, body length 5 cm can eat about 6 feed fish. It is generally cultivated in the original pond, that is, it is sterilized before releasing seedlings, fertilized to cultivate feed fish, and when the feed fish grows into 5cm white spot dog fry, 1000 fry are put on each mu.

3. Nurturance management measures: with the growth of white spot pike, the palatable specifications and quantity of feed fish are also increasing, so it is necessary to grasp the feeding in time and separate the size specifications once a month to reduce the phenomenon of leftover food. In the case of adequate feed, fish fry cultured to the end of December, individuals can reach 1 kg, reaching the market specifications.

IV. Disease prevention and control

White spot pike has strong adaptability to the environment and few diseases. If bacterial Gill rot occurs, 0.3 micrograms of dibromohydantoin or 0.3 micrograms of dibromohydantoin can be sprinkled in the whole pool, once a day for two days, the effect is very ideal. At the same time, 0.2 micrograms of you chlorine is used for disinfection every 15 days during the high temperature season, and pay attention to pouring stream or river water into the pond or pool to keep the water quality fresh and the water temperature cool, which is more beneficial to its growth.

Fifth, the price of white spot pike

White spot pike meat is very delicious, good taste, is a rare delicacy. Therefore, the price of white spot pike is higher than that of other fish. The price of white spot pike is about 160 yuan per kilogram. The specific price may vary from region to region, but it is still higher than most fish on the market.

VI. Problems in aquaculture

One of the reasons for the high price of white spot pike is that the yield of white spot pike is low, so what is the reason for the low yield of white spot pike?

First of all, the white spot pike has high requirements for the environment, the water temperature of the living environment should be low, it should be rich in water plants, the water quality should be good, and it is an unpolluted water environment.

The second is the factor of the white spot pike itself, the reproduction ability of the white spot pike is not strong, the growth speed is very slow, and the number of reproduction is small.

In addition, the influence of biological factors, white spot pike is a carnivorous fish, its low fish production is also due to the lack of food chain. It is reported that only one mu of white spot pike can be produced in four mu of land, because three mu of land is used to raise feed fish, which shows the high cost of raising white spot pike.

Finally, there are other factors, such as serious environmental pollution, climate warming and so on, which are not suitable for the production of white spot pike.

After introducing so much knowledge about white spot pike, I wonder if you are interested in this kind of high-quality economic fish culture. At present, large-scale culture of white spot pike has been realized, but the technology is not very mature, especially in the south. Farmers with farming experience are recommended to try again, otherwise it is easy to cause losses.