Barracuda seed cultivation techniques
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Barracuda, also known as meat sticks, red-eye fish, its salt, a wide range of temperature, sea water, brackish water or pure water can survive, is omnivorous fish based on plant food. Its optimum growth temperature range is 1 °C ~ 30 °C, and the optimum temperature is 12 °C ~ 25 °C. Barracuda can be cultured not only in seawater and brackish water but also in freshwater ponds, reservoirs and lakes. Barracudas can either be raised or mixed with freshwater fish, crabs, and shrimps. This can not only effectively use the bait in the pond, but also increase the yield by about 10% per mu without increasing the amount of feed. It is an effective way to increase the efficiency of aquaculture, and it is a breed that has great potential for market development. First, the pond conditions 1. Pond selection area of ​​4 acres to 10 acres, water depth of 1 meter to 1.5 meters, bottom sludge depth of 15 cm. The position of the fish pond should be leeward and sunny, with a rectangular slope ratio of 1:2 to 1:2.5. The fish pond should be close to the water source, with smooth drainage and irrigation, fresh water, sufficient water and no pollution. 2. When the fish pond clearing seedlings enter the pond 20 days before the selection, when sunny, dry the pool water, cut off the poolside weeds, remove excess silt, rinse the bottom of the pond, and expose it for several days, providing a good living environment for the barracuda culture. 3. Drug clear pond with 100 kilograms of lime slurry after the pond Quanchiposa, pool bottom and pool slope should be uniformly spilled, completely kill the enemy in the fish pond and various pathogens. 4. Water injection Fertilizer seedlings shall be injected into the fresh river water 10 days before entering the pool. When the water is injected, a double-layer filter shall be used for strict filtration to prevent wild fish, shrimp or enemy organisms from entering the pond. After water injection, 100 kg to 200 kg of swine manure or chicken manure is applied per acre pond to cultivate zooplankton such as rotifers, Cladocera, copepods, etc., so that the snails can feed into the natural bio baits that are adequate and palatable after entering the pool. To improve the natural productivity of fish ponds. The amount of fertilization and fertilization time can be flexibly controlled according to the weather, water temperature, water quality, etc., and generally about 6 days before the fish enters the pond. Second, the fry released by the fry is originally a saltwater fish. Before entering fresh water, it must be fully desalinated. The desalination time must be more than 20 days, and the salinity should be 3 or less. The fry should be kept in the pool for more than 2 days before transport. 1. The fry transport fry transport water temperature should be 16 °C ~ 23 °C, using specifications for 70 cm 40 cm plastic bags plus fresh water transport, each bag of 1500 ~ 2500 fry. The transportation water should be fresh, the organic content is low, and it should be transported by vans at night after being sealed with oxygen. Transport time is controlled within 3 hours and the survival rate of fry can reach 100%. 2. Adjust the temperature of the fry into the pond after long-distance transport. After reaching the pond mouth, do not enter the pool directly. You should put the fry bag into the pool water for about 15 minutes. After the water temperature inside and outside the bag is uniform, the fry bag is opened again, and the fry is slowly placed into the pool when the windward position is selected. 3. Stocking density Barracuda summer fish breeding and stocking density, mainly based on fish species out of pond specification requirements, pond conditions, bait fertilizer supply conditions and the level of breeding techniques and other conditions. General stocking specifications range from 3000 to 4000 pigs per kilogram, and 7,000 to 9,000 pigs can be stocked per mu, and then can be cultivated into fingerlings of 12 cm to 16 cm in size. Generally stocked with fry, complete scales, uniform specifications, no injury and the same batch of fry. 4. The principle of nesting is to make full use of the pond's natural biological feed to improve the natural productivity of fish ponds. The fish ponds can also be used for raising summer fish or grass carp in proper amount. Generally, 2000 to 3000 tails are stocked per acre. In order to avoid culturing fish species and barracudas for bait, water quality and space, two principles must be mastered in the cultivation of barracuda species: (1) Any fish that conflicts with the barracuda in its habitat, food habits, and water quality Class, not polyculture. (2) In order to improve the cultivation of barracuda fish species, the barracuda summer flowers should be stocked in advance to promote the rapid growth of the main fish. Third, feeding bait 1. bait species Barracuda food is very wide, belonging to omnivorous fish-based food bait. In artificial breeding conditions, can be fed vegetable cake, rice bran, bean cake powder, peanut powder, small trash fish, silkworm cocoon or specialized artificial feed and so on. 2. Feeding method According to the habit of barracudas prefering low light, clusters, and fresh water quality, in order to feed bait, it is necessary to achieve “four sets of decisionsâ€: (1) The quality feeding should be palatable. The powdery bait should be fresh, not decay, and be sterilized with salt water with a salinity of 40. With the bait requirements of animal protein content must be above 37%, and according to the fish body specifications, to grasp a reasonable feeding grain size, and to be ready to feed now, can not be put aside for a long time. (2) Quantitative According to different growing seasons and fish body specifications, scientifically formulate the amount of bait throughout the year. The early stage of the fish fry entering the pool is a period of rapid growth of the barracuda, which is dominated by powdery bait. The daily feeding is 2 to 3 times, and the feeding amount is 3% to 4% of the barracuda's body weight. In the hot season, the water temperature is higher, the water in the pool at night is prone to lack of oxygen, and the barracuda is also prone to various fish diseases. It is mainly fed with bait, and it is fed twice daily, and the feeding amount is 2% to 3% of the barracuda weight. %, take care not to let the fish eat night food. Falling water temperature in autumn, barracuda is not easy to get sick, can be fed day and night, to increase its weight, to create conditions for barracuda wintering, daily feeding is 3 to 4 times, feeding amount is 4% to 5% of barracuda weight . (3) Positioning domesticated barracudas to concentrate on food intake is the key to breeding barracuda seedlings. Barracuda is a medium- and high-level fish. The food table can be placed shallow and made of lu plates or mesh sheets. After the summer flower enters the pool, it begins feeding and domesticating on the second day. After 7 days, the barracuda can develop the habit of centralized and fixed feeding, which can minimize the waste of food. (4) Timing In the growing season, feeding should adhere to the principles of early feeding, late stopping and a few times. Each feeding should have a fixed time, usually between 8:00 am and 9:00 am, feeding 1/3 of the amount of bait throughout the day; from 17:00 to 18:00, 2/3 of the amount of bait is fed throughout the day. Fourth, the water quality management Barracuda Xi fresh water, during the cultivation should maintain long-term fertilization, live, cool. When the fish is in the pool, keep the water depth at 60 centimeters or so to help increase the water temperature and promote the growth of natural food organisms. During the middle period of cultivation, the water depth is kept between 80 centimeters and 120 centimeters. In the later period of culture, the water depth is kept between 120 centimeters and 160 centimeters. During the growing season, the new water is generally changed every 15 days, and about 30% of the pool water is changed every time. When changing the water, some of the bottom old water should be drained, and then the new water should be injected so that the sun can irradiate the water body as deeply as possible, making the entire water body an oxygen-enriched area, so as to promote the rapid growth of the barracuda. Fifth, fertilization and fertilization can promote the growth and reproduction of natural food and improve the natural productivity of fish ponds. In addition to the application of basal fertilization, during the aquaculture process, fertilizers should be top-dressed in a timely and appropriate manner in accordance with pond water quality and transparency, so that the body of water can maintain a certain degree of fat for a long time, and the natural bait of barracuda can be increased. Generally, fertilizer is applied once every 20 days, and chicken manure or pig manure is applied from 100 kg to 200 kg per mu. Six, disease prevention and control of aquaculture, barracuda is not prone to major diseases, but to do a good job of prevention of fish diseases. When the summer flowers are stocked, the fish body is soaked in saline solution with a salinity of 30 minutes for 5 minutes to 10 minutes to ensure that the lower pool summer flowers have a good constitution. Every 20 days, each pond is poured with 20 kg of quicklime and the whole pool is splashed to disinfect the body of water and prevent fish diseases. Normally, baits such as salt and allicin are regularly added to feeds and fed for 7 days. The main predators of barracuda are crawfish, crabs, and carnivorous fish. Once discovered, they should be removed immediately. VII. Daily Management 1. The patrol pond will be patrol the pond three times a day in the morning, middle and evening to observe the pond water quality, barracuda feeding, floating head and disease, etc., to remove the weeds from the pond, keep the pond clean, and keep a good record of breeding. To solve problems found in time. 2. The temperature-reducing barracuda is a saltwater fish. When the water temperature is above 35°C in the summer, the barracuda is difficult to adapt to. The pool water level should be raised to the maximum height and the water should be changed in time to reduce the water temperature. 8. After the winter passes through the pond and the winter season, the weather turns cold and the water temperature drops, and the barracuda's ability to move is correspondingly weakened. At this time, feeding should be stopped. After about 1 week, select the sunny net and pond, count according to the specifications, and put it into the wintering pond for winter.