Hello, landlord! The white spotted pike grows fast and can leave the pond that year; The predation range is wide, and all fish can be used as bait fish; The suitable water temperature is low, and it can prey on growth from 6℃ to 26℃; The characteristics of tough meat, less thorns, delicious taste and high nutritional value make the white-spotted pike gradually become a high-quality variety to carry out famous aquaculture in ponds all over the country. 1, pond conditions The pond covers an area of 5 mu, the thickness of silt at the bottom of the pond is below 10 cm, and the highest water level can be increased to 2.5 meters. The water source is sufficient, the water quality is convenient for water intake and drainage, and the water quality meets the water standard for fishery culture. It is equipped with 1 to two 3 kW aerators. 2. Preparation before seedling release 15 days before seedling release, drain the water in the pond, and sprinkle the whole pond with 75 kg/mu of quicklime to thoroughly clean the pond and disinfect it, so as to kill pathogenic bacteria and other harmful organisms at the bottom of the pond. After 2-3 days of exposure, the decomposed chicken manure150kg/mu disinfected with quicklime is applied, and 60cm fresh water is added after the whole pond is sprinkled to cultivate natural bait organisms. Sufficient palatable bait fish should be prepared when the white spotted pike fry enter tang qian, and the method of cultivating bait fish in the original pond should be adopted. About May 26th every year, 6,800 carp and crucian carp summer flowers are put as bait fish, with a total stocking amount of 200,000. 3. Stocking of fry Every year around June 4th, 5,000 imported pike fry of 4-6 cm/tail will be mainly raised in ponds, and silver carp and summer flowers will be interplanted to adjust the water quality. 4. Feeding Management (1) Cultivation and feeding of bait fish According to the living habits of white spotted pike, which mainly feeds on carnivorous live bait and the price of fry is high, this experiment adopts the method of feeding live bait in the whole process of breeding. Because different specifications of pike have different specifications for bait fish, in order to avoid mutual damage caused by insufficient supply of bait fish, in the culture experiment, the palatable bait fish was cultivated by applying fertilizer in the original pond before releasing pike, and the bait fish was supplied by combining self-cultivation and outsourcing after stocking pike. In the process of feeding fish and outsourcing culture, microecological agents (such as photosynthetic bacteria) and Chlorella are used to adjust and fertilize the water quality. In the process of culture, the growth of white spotted pike and the number of bait fish stored in the pond are regularly detected to adjust the size and supplementary quantity of bait fish at any time. The size of bait fish fed is generally 1/3 of the body length of white spotted pike, and the supplementary quantity is about 5 palatable bait fish per white spotted pike per day according to the daily intake. (2) Water quality control technology The white spotted pike likes a water environment with fresh water, rich dissolved oxygen and suitable temperature. In the process of culture, with the increase of water temperature and the growth of fish, water is added in time to gradually increase the depth of pool water to more than 2.0 meters; During the high temperature in summer, deep well water is injected into the pond every day to keep the water fresh, and the water temperature is regulated and controlled below 26℃. Regularly use the microecological preparation photosynthetic bacteria to adjust the water quality, the application method is once every 15 days in June, July and August, and the pressurized bottom application and the whole pool sprinkling are carried out alternately, and the dosage is 2.5 kg/mu. In addition, according to the water quality situation, bio-fertilizer, EM stock solution and substrate improver are timely sprayed to keep the pool water "fat, lively, tender and cool" and the dissolved oxygen is above 5mg/L.. (3) The principle of putting prevention first and combining prevention with control should be adhered to in the breeding process of disease control technology. Through the methods of thoroughly cleaning the pond with quicklime for disinfection, soaking and disinfecting the bait fish with 3%-5% salt solution, and regularly using microecological agents to sprinkle all over the pond, no obvious diseases were found in the whole process of culture. The Chinese herbal medicine preparation was sprayed all over the pool for the white-spotted pike with wheel disease, and the effect was good. Regular use of quicklime/KLOC-0.5 to 20 kg/mu in the whole pool for routine disinfection. In the epidemic season of fulminant hemorrhagic disease, it can be seen that there are bleeding spots and dead fish on the body surface of pike, so 10% povidone iodine solution is sprayed all over the pool, 250 to 300 ml/mu.m for two days, and the death is stopped and cured. (4) In daily management, patrol the pond for three times in the morning, at noon and at night, observe the fish's feeding, growth, water quality and water level changes, solve problems in time when found, prevent floating heads and flooding the pond, and make a good record of the culture log. 5. Several problems that should be paid attention to (1) Pay attention to the adaptability of water temperature. The white-spotted pike is a sub-cold water fish. Experiments have proved that its fish activity is strong when the water temperature is above 24℃. To maintain excessive metabolism, it is necessary to maintain sufficient dissolved oxygen content and good water quality. Therefore, the cost of breeding in high temperature season increases, and the individual growth of fish is slow. As soon as the high temperature season is over, it will enter the stage of rapid growth, that is, the temperature is suitable in autumn and winter, and the feeding is vigorous, so the feeding amount should be appropriately increased. (2) Regularly use microecological agents (such as photosynthetic bacteria) to adjust water quality. Through the management of aquaculture production, it is concluded that pike with white spots likes water with fresh water quality, high dissolved oxygen and little organic matter, and its transparency is kept at about 35 cm. Therefore, it is the key to the success of aquaculture to adjust the water quality and create a good growth environment for it. Splash photosynthetic bacteria regularly, the water color is changeable, the pool water is always "fat, lively, tender and cool", the fish's anti-stress ability and immunity are enhanced, the incidence rate is low, and the food intake is vigorous. In addition, combined with the cross-throwing of substrate improver, EM stock solution and biological fertilizer and water element, the circulating renewal of pool water is ensured. Note: The dead time of white spotted pike in low dissolved oxygen environment is very short, so it is unlikely to be rescued by adding oxygen after finding its floating head. Therefore, it is necessary to maintain a high dissolved oxygen content in the water body and maintain the normal physiological needs of pike. (3) Low-temperature culture can fill the blank of winter culture in cities and counties. The white-spotted pike originated from Irtysh River basin in Xinjiang, belonging to sub-cold water fish. It was introduced and transplanted to Jixian County in Tianjin in the southeast, and the growth period was prolonged, so that the white-spotted pike kept growing slowly under the condition of sufficient feed in winter. Therefore, appropriate bait fish were put in the white-spotted pike wintering pool to ensure sufficient bait fish in winter, prevent individual white-spotted pike from killing each other and improve the wintering survival rate of white-spotted pike. At the same time, fill the blank of pond cultivation in winter idle period in districts and counties of this city. (4) Feeding live bait fish to improve the survival rate of fry. The white pike is a large carnivorous and fierce fish, and it must eat live bait. It is suggested that the method of feeding live bait fish should be adopted to improve the survival rate of fry at present. The most favorite bait fish for pike is its body length 1/3, and the daily intake can be calculated as about 5 palatable bait fish per pike. (5) Adjust the water temperature and density during transportation, pay special attention to the treatment of the fish body after mechanical damage during transportation, and adjust the water temperature step by step, so as not to rush. Special attention should be paid in the process of temperature regulation. The fish will start to kill each other on the second day after being shipped back. It is necessary to arrange the density reasonably, do a good job in grading specifications, and ensure that the bait fish is sufficient. (6) Pay close attention to the change of pond water temperature. Although pike is a wide-temperature fish, it has been proved by practice that when the temperature exceeds 24℃, its activity is obviously intensified, and its temperament is unstable, which is easy to cause fights and accidental injuries. Therefore, it is necessary to pay close attention to the change of pond water temperature in the process of breeding pike. In high temperature season, the pond water level can be raised to more than 2 meters, or the pond culture density can be reduced, or a grape trellis can be built on the south bank of Xiangyang to shade and cool down, and ecological culture can be carried out. (7) Live bait fish should be healthy and germ-free. The white-spotted pike is a fierce fish. The main sources of bait fish are small crucian carp, carp, silver carp, summer flowers and wild miscellaneous fish. It is found that the parasitic infection rate of white-spotted pike is high in culture. After analysis and detection, the pathogen is related to the bait fish. Therefore, attention should be paid to check whether the bait fish carries pathogenic bacteria before throwing the bait fish, and the fish body must be soaked and disinfected before throwing the bait fish every time to avoid infecting the white-spotted pike with pathogens. Hope to adopt, thank you!