The white-spotted pike, belonging to the order Pterophylla, Pseuda subfamily, Pelidae, Pteropus, is distributed in Asia, Europe and North America. It is only produced in the Irtysh River Basin in the north of Xinjiang in China. The pike is tough, stout, and delicious, and it is a popular economic fish. Now introduce its breeding technology as follows.
First, living habits
Pike lives in the waters of cold regions. It is a cold-water fish with a suitable temperature range of 0°C to 30°C and an optimum growth temperature of 22°C to 26°C. At the seedling stage, zooplankton such as rotifers, small horned horns, and copepods feed on, and they prey on other fish. When food is insufficient, it will eat itself and it is a large ferocious carnivorous fish. In natural water, the largest individual can weigh up to 40 kg. Juvenile fish cluster activities, adult fish scattered for food, rapid and agile, often active in aquatic grass.
Second, fry cultivation
The length of larvae was 8.5-9 mm when the white-tailed pike had just emerged from the membrane, and it was 11-14 mm when the yolk sac was absorbed. At this point, the larval length can be transferred to the fry cultivation stage.
1. Cultivation of cages: cages are 11 meters deep and 0.3 meters deep. The cage was nailed with wooden boards and the bottom of the box was closed with a 40 mesh screen. The cages can be placed in large ponds and require fresh water in the ponds and high dissolved oxygen. They can also be placed in large cement pools and require micro-flow of the pool water to keep the dissolved oxygen in the water body high. Stocking densities range from 1000 to 1,500 tails per square meter. Feed zooplankton such as rotifers, small clarinets, and copepods for feed, and feed them with bait for 1 to 2 days. Feed 4 times a day. The amount of each feed should not be too high. It is advisable to feed 3 to 5 fish feeds per tail. If the puppies of the puppies are full of food and cause death, they should be watched every time they are fed to prevent overfeeding. After 10 days of cultivation, the fry can grow to 3 cm.
2. Cultivation of cement pools: The cement pool covers an area of ​​1,060 square meters with a pool depth of 0.5 square meters. The stocking density per square meter is 100 to 150. Feed small-scale zooplankton or other fish seedlings that have just filmed out, such as wheat bran. The cement pool nursery should adjust the water change in time to ensure that the dissolved oxygen in the water body is higher, and at the same time ensure sufficient feed. When the body of the fish is as long as 4-7 cm, if there is insufficient feed, self-inflicted food will occur, so the fry 3 to 5 cm in length must be moved into the pond for spawning.
3. Pond cultivation: The pond area is about 1 to 3 mu and the water depth is 1 to 1.5 meters. The water can best be drained and drained. 15 days prior to planting, 150 kg of quicklime clear pond was used for disinfection and 250-300 kg of manure was applied to cultivate sufficient zooplankton for open feed. Three days before the release of seedlings, soybean milk ponds made of 2 to 3 kg soybeans per mu are used to ensure that there is sufficient biological feed for feed fish to feed. One day before the fish was released, 200,000 to 300,000 wheat aphid seedlings were used as feed fish for the white spotted dogfish fry. Papaver frutescens seedlings 2-30000, put every two days after the seedlings should be fed once, soy milk for feed fish feed, soybeans with 2 to 3 kg per acre, when the fry grow to 4.5 cm body length, it is timely Pulling the net into sparsely aquaculture ponds.
Third, adult fish breeding
1. Pond conditions: an area of ​​5 to 8 acres, water depth of 2 meters, adequate water, drainage and irrigation, to ensure that the water temperature can be lowered in the hot season. At the same time, water ponds are placed on the surface of the pond for shading. It is best to plant pine seedlings and other aquatic plants in the pool as shelters to prevent self-inflicted phenomena.
2. Prepare the feed: fish pond fish seedlings before the next pond to prepare enough palatable feed fish, body length 5 cm can feed 6 or so feed fish. Generally used for the cultivation of the original pond, that is, disinfection before the release of seedlings, fertilization and cultivation of feed fish, until the feed fish grow into 5 to 6 when the Chaozhou into the 5 cm long white spotted dog fry, mu 1000.
3. Cultivation management measures: With the growth of pike, the required palatability and quantity of feed fish are also increasing. It is necessary to grasp the feeding in a timely manner. Simultaneously, the net size will be separated once a month to reduce the residual food phenomenon. In the case of adequate feed, the fry were cultured until the end of December, and individuals could reach 1 kg to meet the market specifications.
IV. Disease Prevention
Pygmy is more adaptable to the environment and has fewer diseases. In the event of bacterial gizzard disease, 0.3 micrograms of Chlorine Chloride or 0.3 micrograms of dibromohydantoin can be used for spillage. Once a day for two days, the effect is very satisfactory. At the same time, in the high-temperature season, every 15 days with a net disinfection of 0.2 micrograms of chlorine, while paying attention to the pond or pool to flush the stream or river water, keep the water cool, the water temperature is cool, more conducive to its growth.
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