The use of summer leisure sun greenhouses or plastic greenhouses to raise amberjack squid is a new project that has broadened the application of sheds and improved the utilization rate of sheds in the past 12 or so years. According to the survey, the annual output value of the acres of sheds can reach around 30,000 yuan, and the maximum value can reach 50,000 yuan. The specific feeding techniques are:
1. Characteristics of eight-sacked mackerel The eight-sacked mackerel was originally named Calyx vulgaris, a new fingerling from Egypt. Because it had eight beards, the masses called it octopus.
(a) Features. The head of amberjack squid is more square-shaped than the beard squid of our country. It has a large body and a conical shape. The pectoral fin is a hard thorn, and the body has black spots and greyish white cloud spots. The chest and abdomen are white, and the mouth crack is wider. Because it also has an auxiliary respirator in addition to the sputum, it can take oxygen directly from the air.
(b) Characteristics.
1. Resistant to hypoxia and anti-pollution. Octased fish can grow normally in water environments where other fish cannot survive. It was determined that when the amount of dissolved oxygen in the water is less than 0.1228 ppm, it can still live normally by swallowing air uptake.
2. Resistant to high water temperature, hi shallow water. The suitable water temperature for the growth of amberjack was 25-30°C. It grew slower than 15°C, and died below a temperature of 7°C. The depth of water should be 75-100 cm, which is too deep and the sun is not in the end, which is unfavorable for growth and development.
3. Extensive food. Octased octopus is an omnivorous fish that feeds both animal and plant foods. However, in natural waters, it mainly feeds animal foods such as plankton, shrimp, and insects. Under artificial rearing conditions, feeding of animal and plant feeds may be sufficient, but feeding of animal feeds grows faster. Vegetable foods include bean cakes, peanut cakes, cornmeal, and drum skins. Animal feedstuffs include various miscellaneous insects that grow in the water, various wastes from slaughter plants (spots), and dead cat litters and dead livestock and poultry.
4. Can feed densely, grow fast and produce high yield. Since amberjack catfish is resistant to hypoxia, it is also a bottom fish. Because of its habit of colony, it can be kept at a high density. General mu can be stocked 6000-7000 tails. As long as the feed is sufficient, the weight can be increased by 150 grams per month, and the weight of the monomer can reach 500-750 grams in 4 months.
5. Strong disease resistance, less incidence. In addition, the amberjack eel has a gentle temperament and does not make holes. Therefore, it is also possible to use plastic sheets to prevent leakage.
Second, breeding techniques (a) to build fish ponds and water disinfection and fertilization use plastic solar greenhouses, plastic middle and large sheds during summer leisure feeding amberjack catfish, the former winter cucumber, summer squash, or winter and spring cucumber, pumpkin squatting is appropriate; The latter uses cauliflower, kale and fast-growing vegetables, which are suitable for the first meal that can be eaten in mid-May. From the perspective of the structure of the shed, the unsupported greenhouses before the slope were the most advantageous. If there are pillars under the front slope of a greenhouse or plastic shed, the pillars must first be removed (but not removed from the arches and sheds). Each wall in front of the center pillar and under the front edge should be used for 1 metre high bricks (bricks). Earth is needed outside the wall to support the wall). The same high dry brick walls can also be erected at the two gables. However, if the original old gable meets the requirements, it may not be rebuilt. When constructing a fish pond, you can build dry bricks, or you can dig a pit 33 centimeters deep, use the soil that has been dug out to cultivate around, and make the pits reach 1 meter deep; or you can dig and add bricks and bricks. Then, the floor of the pool is leveled and loosened, the roots are picked up, and finally a whole piece of plastic shed film (which can be artificially bonded when insufficient) is used to lay the bottom of the pool, and the four sides are lifted and attached to the wall to cover the top of the wall. Press it down with soil, then spread a layer of 8-10 cm thick loam on the bottom plastic sheet, then fill with water (70-80 cm deep), add 15-25 kg of quicklime per minute, and press again. Add 60 kilograms of human feces or 8 kilograms of sesame oil per point to fatten the body of water. The general release of water should be carried out 15-20 days before the release of fry.
(b) Fish feeding and management. The octopus carp has the habit of eating fish with large fish. Therefore, during the fry cultivation and when putting the fry, the fry must be sorted by size to achieve grading feeding. The initial fry hours can be made with eternal gauze cages and placed into the pool for isolation and feeding. In order to focus on feeding materials and prevent fish from eating large fish; when the fish grow into the pool, it should also pay attention to the size of fish feeding. At the same time, it is necessary to pay attention to the control of the water temperature at around 30°C. When the sunlight is strong, cover the hatching ponds and cultivation areas. In addition, the restocking time is appropriate in early June. After the fry is slightly larger, it is necessary to feed and increase animal protein feed (usually 1-2 times a day), with fresh animal feed best. Such as a family feeding, generally can be voted fly maggots, silkworms, cockroaches, fish meal, cocoon, duckweed, rice bran, bean cakes, chickens, poultry and other internal organs. The daily feed is about 5-10% of the body weight of the fish. Or put the fermented cottonseed cakes, bean cakes, or the viscera of livestock and poultry, the carcasses of livestock and poultry corpses, or the carrion after detachment. However, when animal internal organs and corpses are released, they must be crushed and then fed. During the breeding period, it is necessary to add fresh water once every two or three days to the pool, but be careful not to put the water in the pool at one time and put it in fresh water again. This will cause the fish to eat without feeding and fail to feed.
(c) Prevention of fish diseases. Octascus squid is highly resistant and generally less ill. However, due to illness in the environment, there are enteritis and skin disease (print disease).
1. enteritis. The diseased fish suffering from enteritis mostly floated on the surface of the water, did not eat or sink, and had a large abdomen. It was also seen that the abdomen had pale yellow-green fluid flowing from the anus (no food in the intestine). The treatment method is to use a mixed aqueous solution of 0.5 g of copper sulfate (lanthanum) and 0.2 g of ferrous sulfate (black cesium) per cubic meter of water to perform spilling in the whole tank.
2. Black body disease. The main symptoms are weight loss of the fish body, darkened body color, diseased fish floating straight on the surface of the water, white villous plaques on the snout and the back, sometimes resembling aquatic plants, with a red blood spot on the inner side of the pectoral fins, mostly occurring in the fry stage. . When the forest is insufficient and the water quality is contaminated, it is most susceptible to disease. Control method: Use 1 g of bleaching powder per cubic meter of water to splash the entire pond. Replace the pool water after medication and then apply the medicine once, and pay attention to keep the water fresh.
3. Trichinosis. It is caused by a parasitic worm body. After the onset, the diseased fish became thin and stopped feeding. The fish body became dark and swam out of the pool and soon died. Control methods: 0.5 grams of copper sulfate per cubic meter of water, 0.2 grams of ferrous sulfate Quanchiposa, with 0.7 grams of copper sulfate alone. Or soak the fish with salt (2%) solution for 15 minutes, or dip with 3% salt solution for 5 minutes.
1. Characteristics of eight-sacked mackerel The eight-sacked mackerel was originally named Calyx vulgaris, a new fingerling from Egypt. Because it had eight beards, the masses called it octopus.
(a) Features. The head of amberjack squid is more square-shaped than the beard squid of our country. It has a large body and a conical shape. The pectoral fin is a hard thorn, and the body has black spots and greyish white cloud spots. The chest and abdomen are white, and the mouth crack is wider. Because it also has an auxiliary respirator in addition to the sputum, it can take oxygen directly from the air.
(b) Characteristics.
1. Resistant to hypoxia and anti-pollution. Octased fish can grow normally in water environments where other fish cannot survive. It was determined that when the amount of dissolved oxygen in the water is less than 0.1228 ppm, it can still live normally by swallowing air uptake.
2. Resistant to high water temperature, hi shallow water. The suitable water temperature for the growth of amberjack was 25-30°C. It grew slower than 15°C, and died below a temperature of 7°C. The depth of water should be 75-100 cm, which is too deep and the sun is not in the end, which is unfavorable for growth and development.
3. Extensive food. Octased octopus is an omnivorous fish that feeds both animal and plant foods. However, in natural waters, it mainly feeds animal foods such as plankton, shrimp, and insects. Under artificial rearing conditions, feeding of animal and plant feeds may be sufficient, but feeding of animal feeds grows faster. Vegetable foods include bean cakes, peanut cakes, cornmeal, and drum skins. Animal feedstuffs include various miscellaneous insects that grow in the water, various wastes from slaughter plants (spots), and dead cat litters and dead livestock and poultry.
4. Can feed densely, grow fast and produce high yield. Since amberjack catfish is resistant to hypoxia, it is also a bottom fish. Because of its habit of colony, it can be kept at a high density. General mu can be stocked 6000-7000 tails. As long as the feed is sufficient, the weight can be increased by 150 grams per month, and the weight of the monomer can reach 500-750 grams in 4 months.
5. Strong disease resistance, less incidence. In addition, the amberjack eel has a gentle temperament and does not make holes. Therefore, it is also possible to use plastic sheets to prevent leakage.
Second, breeding techniques (a) to build fish ponds and water disinfection and fertilization use plastic solar greenhouses, plastic middle and large sheds during summer leisure feeding amberjack catfish, the former winter cucumber, summer squash, or winter and spring cucumber, pumpkin squatting is appropriate; The latter uses cauliflower, kale and fast-growing vegetables, which are suitable for the first meal that can be eaten in mid-May. From the perspective of the structure of the shed, the unsupported greenhouses before the slope were the most advantageous. If there are pillars under the front slope of a greenhouse or plastic shed, the pillars must first be removed (but not removed from the arches and sheds). Each wall in front of the center pillar and under the front edge should be used for 1 metre high bricks (bricks). Earth is needed outside the wall to support the wall). The same high dry brick walls can also be erected at the two gables. However, if the original old gable meets the requirements, it may not be rebuilt. When constructing a fish pond, you can build dry bricks, or you can dig a pit 33 centimeters deep, use the soil that has been dug out to cultivate around, and make the pits reach 1 meter deep; or you can dig and add bricks and bricks. Then, the floor of the pool is leveled and loosened, the roots are picked up, and finally a whole piece of plastic shed film (which can be artificially bonded when insufficient) is used to lay the bottom of the pool, and the four sides are lifted and attached to the wall to cover the top of the wall. Press it down with soil, then spread a layer of 8-10 cm thick loam on the bottom plastic sheet, then fill with water (70-80 cm deep), add 15-25 kg of quicklime per minute, and press again. Add 60 kilograms of human feces or 8 kilograms of sesame oil per point to fatten the body of water. The general release of water should be carried out 15-20 days before the release of fry.
(b) Fish feeding and management. The octopus carp has the habit of eating fish with large fish. Therefore, during the fry cultivation and when putting the fry, the fry must be sorted by size to achieve grading feeding. The initial fry hours can be made with eternal gauze cages and placed into the pool for isolation and feeding. In order to focus on feeding materials and prevent fish from eating large fish; when the fish grow into the pool, it should also pay attention to the size of fish feeding. At the same time, it is necessary to pay attention to the control of the water temperature at around 30°C. When the sunlight is strong, cover the hatching ponds and cultivation areas. In addition, the restocking time is appropriate in early June. After the fry is slightly larger, it is necessary to feed and increase animal protein feed (usually 1-2 times a day), with fresh animal feed best. Such as a family feeding, generally can be voted fly maggots, silkworms, cockroaches, fish meal, cocoon, duckweed, rice bran, bean cakes, chickens, poultry and other internal organs. The daily feed is about 5-10% of the body weight of the fish. Or put the fermented cottonseed cakes, bean cakes, or the viscera of livestock and poultry, the carcasses of livestock and poultry corpses, or the carrion after detachment. However, when animal internal organs and corpses are released, they must be crushed and then fed. During the breeding period, it is necessary to add fresh water once every two or three days to the pool, but be careful not to put the water in the pool at one time and put it in fresh water again. This will cause the fish to eat without feeding and fail to feed.
(c) Prevention of fish diseases. Octascus squid is highly resistant and generally less ill. However, due to illness in the environment, there are enteritis and skin disease (print disease).
1. enteritis. The diseased fish suffering from enteritis mostly floated on the surface of the water, did not eat or sink, and had a large abdomen. It was also seen that the abdomen had pale yellow-green fluid flowing from the anus (no food in the intestine). The treatment method is to use a mixed aqueous solution of 0.5 g of copper sulfate (lanthanum) and 0.2 g of ferrous sulfate (black cesium) per cubic meter of water to perform spilling in the whole tank.
2. Black body disease. The main symptoms are weight loss of the fish body, darkened body color, diseased fish floating straight on the surface of the water, white villous plaques on the snout and the back, sometimes resembling aquatic plants, with a red blood spot on the inner side of the pectoral fins, mostly occurring in the fry stage. . When the forest is insufficient and the water quality is contaminated, it is most susceptible to disease. Control method: Use 1 g of bleaching powder per cubic meter of water to splash the entire pond. Replace the pool water after medication and then apply the medicine once, and pay attention to keep the water fresh.
3. Trichinosis. It is caused by a parasitic worm body. After the onset, the diseased fish became thin and stopped feeding. The fish body became dark and swam out of the pool and soon died. Control methods: 0.5 grams of copper sulfate per cubic meter of water, 0.2 grams of ferrous sulfate Quanchiposa, with 0.7 grams of copper sulfate alone. Or soak the fish with salt (2%) solution for 15 minutes, or dip with 3% salt solution for 5 minutes.
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