Stingray is an omnivorous fish dominated by animal feed. It is delicate and has a good taste. It is very popular among people. In recent years, due to the continuous reduction of natural resources, the contradiction between supply and demand in the market has become prominent, and the artificial breeding of stingrays has also risen quietly. According to statistics, in Jiangsu Province, the area of ​​main stingrays and nesting stingrays reached about 0.7 hectares last year. However, the supply in the market is still in short supply, and prices are rising. In 2000, the author conducted experiments on the cultivation of stingrays in miniature cages in ponds for the cultivation of other aquatic products, and achieved good economic benefits. This is a new breeding project with an investment province, quick results and easy operation. Now its breeding technology is introduced as follows: First, the cage set cage is made of polyethylene mesh stitches, the mesh is 1cm, the specification is 2m X2m X2m, the cage uses a closed stretcher float, cage At the bottom, a 9-mesh net cloth was used as the cushion, and the cushion edge height was 920 cm to reduce feed loss. The upper part of the cage was about 30 cm above the water surface. A square plastic basket with a height of 10 cm and a side length of 30 cm made of 18 mesh polyethylene screens was used as a food table and placed in the middle of the box, one per box. The cages are set at the inlet of other aquatic products (fish, shrimps, crabs, etc.) in the pond, and 1 to 3 cages per 667 square meters (1 mu) can be set. It can also be set in spacious waters with fresh water, adequate dissolved oxygen, sheltered winds and no pollution. Arranged in a "one" shape, box distance of 4 meters, spacing 10 meters. In order to cool the sunfish and protect the sun's rays in the summer, the water hyacinth or water peanut that covers about 2/3 of the cage area is transplanted into the cage. Second, the fish breeding net cages in the fish stocking 1 ~ 2 weeks before the release of water, so that the box attached to some algae attachments to reduce the fish into the box after the box and the friction damage. Fish species require complete body surface, no disease, no injuries, robust physique, and neat specifications. The 100-150 species of large-sized fingerlings stocking about 20 g/m2 per square metre are stocked. Third, feeding and management 1 feeding bait: Due to the high stocking density, the natural food in the pond alone is not enough, so according to the feeding habits of the breeding object, artificial bait is properly fed, commonly used baits are small miscellaneous fish, snail meat, loquat, Silkworm cocoons, livestock and poultry organs and animal blood, etc., according to the timing, positioning, qualitative, quantitative principles of feeding, to ensure that the cod in the cage to eat well, and rapid growth. 2 tube of water: always keep the water fresh, dissolved oxygen is sufficient, abnormal water should be found in time or change the water. 3 Inspections: Inspect the fish ponds and cages daily, observe the fish activity, check whether the cages are damaged, remove the sick fish and dead fish from the cages, and keep the water inside the cage clean. Clean the cages once a week to ensure the normal exchange of water inside and outside the cages. When the water level changes, adjust the height of the cage in time. Fourth, disease prevention adhere to the principle of “prevention, prevention, and preventionâ€. The cage is soaked with bleach solution for 30 minutes before entering the water. Because the stingray has a hard spine on the back and pectoral fins, it is operated and transported when the fish species enter the box. During the process, extreme care must be taken to prevent infections caused by hard punctures of the same species; fingerlings and other drugs should be used to dip the fish before entering the box to kill surface pathogens and parasites; use lime water every 10-15 days. The whole box was spilled and disinfected once; regular use of copper sulfate, ferrous sulfate mixture hanging bag; every 20 days or so with antibiotics made of bait continuous feeding 2?? 3 days. These measures can effectively prevent the occurrence of fish diseases in the breeding cycle. It is worth mentioning that the use of aquaculture ponds should consider the effects that other fish may have on each other.
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