The cage-cultured puffer fish has the advantages of mobility, flexibility, simplicity, wide water area adaptability, and simple operation.
First, aquaculture waters. Choose waters that are sheltered from the sun, have a quiet environment, are fresh in water, free from pollutants, have no obstacles, have a wide water surface, and have good sunshine conditions as cage culture waters. Nautical cages should not be set up in waterways, dams, sluice gates, main waterways, and waters where the flow rate of water exceeds 0.1 meters per second. The bottom of the cage should have a distance of 0.5 meters or more from the bottom to prevent the cage from being stranded. The water depth of the cage is usually set at 3-6 meters per year, and the dissolved oxygen is more than 4 milligrams per liter.
Second, cage settings. The size of the puffer fish is about 3 cm in body length, and the mesh size of the cage is 6 mesh per square centimeter; when the size of the puffer fish is more than 8 cm in length, the mesh diameter is 1.5 cm. The size of the cage is 5m 8m 2.5m and the upper mouth is 30cm above the water surface. In more open water, the arrangement of cages should be "goods", plum or "people", and the distance between cages should be 15-30 meters. If restricted by water conditions, the cages must be in a "1" shape. When arranging, each 2 cages should be grouped into groups of more than 50 meters apart. Feeding cages generally account for about 4% of the installed surface.
Third, fish stocking. Ten to 15 days before stocking, cages should be "tested". Requires complete fish body surface, no disease, no injuries, strong physique, and neat specifications. Before the puffer fish is introduced into the cage, the oxygen bag containing the fry is selected and placed in the box for 15 minutes. When the water temperature in the bag is approximately the same as the water temperature in the tank, the fish is released. Store about 12 tails per square meter cage. In order to prevent the growth of moss in cages, a small amount of fish feeding on plants should also be stocked in cages.
Fourth, feed the bait. Feeding should be scheduled, fixed, qualitative, and quantitative. The cages are stocked with appropriate amounts of aquatic peanuts and other aquatic plants, and the aquatic plants cover about 20% of the water surface. One week before stocking, the puffer fish was splashed with soy milk and dregs in the cage to cultivate the early feed of the puffer fish. After the puffer fish entered the box, it began to feed the bait with a 3:1 ratio of crushed fish pulp and wheat flour, and the amount fed was 10% of the fish's body weight. The bait was placed on the food table and fed twice at 9 a.m. and 4 p.m.
Fifth, daily management. Day-to-day management mainly includes "one-time service", "secondary service" and "three defenses." "A diligence" is a diligent inspection. Check whether the netting is damaged before launching the cage. Check whether the box is box-shaped after the water is drained. Rinse the cage promptly. Every morning, evening and night, check if the cage is intact. Observe fish and water conditions. "Two catches": A timely cleaning box. Cleaning the cage is usually done with a carton washing machine to clean the attachments on the mesh. Careful handling is required to avoid injury to fish. Rinse the cage and avoid overworking. Two grasping timely transfer box. The water quality should be changed according to the status of the water area. Before the cage is lowered or on the eve of the flood season, the cage must be moved to a safe water area with suitable water level. "Three defenses": One against fish diseases. Before stocking, fresh species should be washed with salt water with 3%-5% concentration for 10 minutes; use disease-free bait, soak the bait with 3%-5% concentration of salt water for 15 minutes before or before feeding; Splash lime water once a month. Check the fish regularly, because they like to swim in the edge of the box, it is easy to bruise the body. Usually every 10 days, the fish is picked up and placed in 2% - 3% concentration of salt water for 15 minutes to prevent parasites and bacteria from growing out. Furazolidone and sulfa drugs are regularly fed. Second, prevent winds and floods. Keep abreast of the weather and move the cages before the winds and floods arrive. Three defense cages are missing. Specialists should guard the cages day and night to prevent loss. At the same time, it is also necessary to prevent rats, otters and water birds from harming puffer fish.
Six, out of the net to take fish. When the species of fish meets the specifications of the bins and boxes, or the standards for the commercial fish, they must be promptly out of the box. Out of the box to take the fish method is: the two work boats were placed on both sides of the cage, first lift the bottom net of the two corners of the cage, and then use the bamboo poles to penetrate the bottom of the net to block, slowly rushed to the end of the cage Then place the bamboo poles on the pontoon. The corner of the pontoon rests on the bow of the boat, picks it up with a rope, unfastens the cage mouth, and uses a fishing rod to reach into the box to remove the fish. Put the fish that meet the conditions of stocking and separation into fish cages or adult fish net cages. The remaining fish species will still be kept in the original cages. If the number of small fish species left is small, several small fish species in cages can be combined into one cage for rearing.
First, aquaculture waters. Choose waters that are sheltered from the sun, have a quiet environment, are fresh in water, free from pollutants, have no obstacles, have a wide water surface, and have good sunshine conditions as cage culture waters. Nautical cages should not be set up in waterways, dams, sluice gates, main waterways, and waters where the flow rate of water exceeds 0.1 meters per second. The bottom of the cage should have a distance of 0.5 meters or more from the bottom to prevent the cage from being stranded. The water depth of the cage is usually set at 3-6 meters per year, and the dissolved oxygen is more than 4 milligrams per liter.
Second, cage settings. The size of the puffer fish is about 3 cm in body length, and the mesh size of the cage is 6 mesh per square centimeter; when the size of the puffer fish is more than 8 cm in length, the mesh diameter is 1.5 cm. The size of the cage is 5m 8m 2.5m and the upper mouth is 30cm above the water surface. In more open water, the arrangement of cages should be "goods", plum or "people", and the distance between cages should be 15-30 meters. If restricted by water conditions, the cages must be in a "1" shape. When arranging, each 2 cages should be grouped into groups of more than 50 meters apart. Feeding cages generally account for about 4% of the installed surface.
Third, fish stocking. Ten to 15 days before stocking, cages should be "tested". Requires complete fish body surface, no disease, no injuries, strong physique, and neat specifications. Before the puffer fish is introduced into the cage, the oxygen bag containing the fry is selected and placed in the box for 15 minutes. When the water temperature in the bag is approximately the same as the water temperature in the tank, the fish is released. Store about 12 tails per square meter cage. In order to prevent the growth of moss in cages, a small amount of fish feeding on plants should also be stocked in cages.
Fourth, feed the bait. Feeding should be scheduled, fixed, qualitative, and quantitative. The cages are stocked with appropriate amounts of aquatic peanuts and other aquatic plants, and the aquatic plants cover about 20% of the water surface. One week before stocking, the puffer fish was splashed with soy milk and dregs in the cage to cultivate the early feed of the puffer fish. After the puffer fish entered the box, it began to feed the bait with a 3:1 ratio of crushed fish pulp and wheat flour, and the amount fed was 10% of the fish's body weight. The bait was placed on the food table and fed twice at 9 a.m. and 4 p.m.
Fifth, daily management. Day-to-day management mainly includes "one-time service", "secondary service" and "three defenses." "A diligence" is a diligent inspection. Check whether the netting is damaged before launching the cage. Check whether the box is box-shaped after the water is drained. Rinse the cage promptly. Every morning, evening and night, check if the cage is intact. Observe fish and water conditions. "Two catches": A timely cleaning box. Cleaning the cage is usually done with a carton washing machine to clean the attachments on the mesh. Careful handling is required to avoid injury to fish. Rinse the cage and avoid overworking. Two grasping timely transfer box. The water quality should be changed according to the status of the water area. Before the cage is lowered or on the eve of the flood season, the cage must be moved to a safe water area with suitable water level. "Three defenses": One against fish diseases. Before stocking, fresh species should be washed with salt water with 3%-5% concentration for 10 minutes; use disease-free bait, soak the bait with 3%-5% concentration of salt water for 15 minutes before or before feeding; Splash lime water once a month. Check the fish regularly, because they like to swim in the edge of the box, it is easy to bruise the body. Usually every 10 days, the fish is picked up and placed in 2% - 3% concentration of salt water for 15 minutes to prevent parasites and bacteria from growing out. Furazolidone and sulfa drugs are regularly fed. Second, prevent winds and floods. Keep abreast of the weather and move the cages before the winds and floods arrive. Three defense cages are missing. Specialists should guard the cages day and night to prevent loss. At the same time, it is also necessary to prevent rats, otters and water birds from harming puffer fish.
Six, out of the net to take fish. When the species of fish meets the specifications of the bins and boxes, or the standards for the commercial fish, they must be promptly out of the box. Out of the box to take the fish method is: the two work boats were placed on both sides of the cage, first lift the bottom net of the two corners of the cage, and then use the bamboo poles to penetrate the bottom of the net to block, slowly rushed to the end of the cage Then place the bamboo poles on the pontoon. The corner of the pontoon rests on the bow of the boat, picks it up with a rope, unfastens the cage mouth, and uses a fishing rod to reach into the box to remove the fish. Put the fish that meet the conditions of stocking and separation into fish cages or adult fish net cages. The remaining fish species will still be kept in the original cages. If the number of small fish species left is small, several small fish species in cages can be combined into one cage for rearing.