The yellow snapper is a pheasant-shaped head, (wei) family, and striax genus, commonly known as amber or yellow thorn, and belongs to small freshwater fish. The weight of 200-300 grams, delicate meat, less thorn scaleless, delicious, nutritious, favored by consumers. The market price is RMB 20/kg, which is a relatively high economic value fish species. Cage culture of stingrays in lakes, reservoirs, rivers and other water bodies is a project worthy of promotion.
First, cage design
1. Specifications of cages. The cage raw material is made of polyethylene. The mesh is generally required to be 2-3 cm, and the mesh is 1.5 cm. The specification of the cage is 12-24 m2, and the depth of the box is 2 m. That is: 3m 4m 2m or 4m 6m 2m.
2. The settings of the cage. The frame is made of bamboo or wood, the cage is placed in the frame, the cylinder foam is used as the float, the bottom of the cage is made of pebbles, and the cage can be raised and lowered as the water level rises and falls. The cages are to be placed in waters with cool water and high dissolved oxygen. The cages were placed in water 1 week before stocking, so that the cage walls adhered to the screen algae to keep them smooth, avoiding scratches on the fish, and the distance between the cages was required to be between 2 and 3 meters.
Second, fish stocking. Cage cultured stingrays are placed before and after the Spring Festival, when the water temperature is low, the fish is not easily injured. Fish species are immersed in the fish body with 0.0000001 malachite green or 5% salt water in front of the box to kill parasites and germs. The stocking density of cage cultured stingrays is 100-150/m2, 20 g is better, and it can reach more than 200 g by the end of August. It is possible to properly adopt a group head or a small scale, which can not only fully utilize the bait but also purify the cage.
Third, bait and feeding. Stingrays are omnivorous fishes, and can be fed animal feed such as small fish, shrimp, livestock and poultry processing waste, etc., and can also be fed vegetable cakes, bran, bean dregs and other plant feeds. Cage culture is best fed with compound feeds (small feed machines are provided with pellets, fish cakes, wheat, corn, bean cakes, etc.). Feed twice a day, 9-10 in the morning and 4-6 in the afternoon. The daily feed amount was 3%-6% of fish body weight.
Fourth, daily management. Observe the fish's activity and feeding conditions, and adjust the amount of feeding properly. 5 to 7 days to clean the cage around the attachments to maintain the convection of the water body. Check the cage regularly for damage. Pay attention to the change of water level.
Fifth, prevention and treatment of fish diseases. Adhere to the main prevention, often bleaching powder or copper sulfate and ferrous sulfate mixture (5:2) bag, replace once a week, regular feeding of antibiotics in feed.
Six, timely fishing listed. The cage culture stingrays can be arrested in batches from the beginning of August, with a profit of 40-50 yuan per square meter and a profit of 25,000-330,000 yuan per 667 square meters.
First, cage design
1. Specifications of cages. The cage raw material is made of polyethylene. The mesh is generally required to be 2-3 cm, and the mesh is 1.5 cm. The specification of the cage is 12-24 m2, and the depth of the box is 2 m. That is: 3m 4m 2m or 4m 6m 2m.
2. The settings of the cage. The frame is made of bamboo or wood, the cage is placed in the frame, the cylinder foam is used as the float, the bottom of the cage is made of pebbles, and the cage can be raised and lowered as the water level rises and falls. The cages are to be placed in waters with cool water and high dissolved oxygen. The cages were placed in water 1 week before stocking, so that the cage walls adhered to the screen algae to keep them smooth, avoiding scratches on the fish, and the distance between the cages was required to be between 2 and 3 meters.
Second, fish stocking. Cage cultured stingrays are placed before and after the Spring Festival, when the water temperature is low, the fish is not easily injured. Fish species are immersed in the fish body with 0.0000001 malachite green or 5% salt water in front of the box to kill parasites and germs. The stocking density of cage cultured stingrays is 100-150/m2, 20 g is better, and it can reach more than 200 g by the end of August. It is possible to properly adopt a group head or a small scale, which can not only fully utilize the bait but also purify the cage.
Third, bait and feeding. Stingrays are omnivorous fishes, and can be fed animal feed such as small fish, shrimp, livestock and poultry processing waste, etc., and can also be fed vegetable cakes, bran, bean dregs and other plant feeds. Cage culture is best fed with compound feeds (small feed machines are provided with pellets, fish cakes, wheat, corn, bean cakes, etc.). Feed twice a day, 9-10 in the morning and 4-6 in the afternoon. The daily feed amount was 3%-6% of fish body weight.
Fourth, daily management. Observe the fish's activity and feeding conditions, and adjust the amount of feeding properly. 5 to 7 days to clean the cage around the attachments to maintain the convection of the water body. Check the cage regularly for damage. Pay attention to the change of water level.
Fifth, prevention and treatment of fish diseases. Adhere to the main prevention, often bleaching powder or copper sulfate and ferrous sulfate mixture (5:2) bag, replace once a week, regular feeding of antibiotics in feed.
Six, timely fishing listed. The cage culture stingrays can be arrested in batches from the beginning of August, with a profit of 40-50 yuan per square meter and a profit of 25,000-330,000 yuan per 667 square meters.