Stingray Pond Ecological Culture Technology

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The stingray, commonly known as the crucian carp, Huanglading et al., is a benthic omnivorous fish. Its fleshy meat is fresh, with less thorns, delicious taste, and rich nutrition. In recent years, people’s awareness of stingrays has been continuously increasing, market demand has been increasing, and prices have steadily increased. Because of limited natural resources, the development of stingrays is imperative. Pond culture stingray has less investment and benefits, and is not limited by size. The farming techniques are introduced as follows. 1. Pond Conditions We should choose ponds with sufficient water sources, fresh water, no pollution, and convenient irrigation and drainage. The area should be 2000-3300m2, which is suitable for feeding management. The water depth is 1.5-2m. The bottom of the pool is flat and there is less silt to facilitate fishing. For ponds with a production of stingrays above 150kg/667m2, oxygen aeration machines, water pumps, etc. should be equipped with oxygen. 2. Pond clearing and disinfection Pond clearing is an important part of improving the living environment of the stingray. The bottom of the pond should be leveled and 50-80 m2 of fish collecting pit should be dug in the bottom of the outlet to facilitate the catching of adult fish. Before the 15 days of fingerlings, the ponds were disinfected with drugs such as quicklime or bleach to remove wild fish. After 3 days, 200-300 kg of fermented pig cow dung were applied per 667 m2 until a large number of zooplankton appeared in the pond and then the fish species were released. Fish species should be soaked with 30-50 g/L saline for 3-5 min before stocking. 3, stocking density Fish stocking density can be based on the pond conditions, management levels, feed supply and fish species specifications and other conditions can be flexible. The pond raises a stingray, and 3,000-5000 tails of a stingray fish are reared at 4-5 cm per 667 m2. When the specifications are larger, the stocking density can be appropriately reduced. In order to make full use of the water space and food resources, we can mix 8-12cm flowers, 200-400 white bream fish, 100-200 tail fish and 1st instar fish per 667m2. class. Put stingrays into other fish species after 15 days to facilitate the growth of stingrays. 4. Feeding and Management 4.1 Feed Feeding Ponds The main breeding stingrays are mainly fed with artificial full-priced feeds. The crude protein content of feeds is required to be 38%-40%, fats are 7%-9%, and carbohydrates are 20%-23%. , cellulose 4%-6%. At present, there are many aquaculture feed brands on the market, and full-price feeds with stable quality and moderate prices should be selected to avoid unnecessary losses due to cheapness. Daily feeds account for 3% to 5% of the fish's body weight and are accustomed to water temperature, water quality, weather, and fish feeding conditions. They are fed once a day at 9-10 am and at 16-18 pm in the morning. The amount accounts for 1/3 of the total feeding amount in the day, and it accounts for 2/3 of the total feeding amount in the afternoon. Feed feeding should adhere to "four sets" and "four look". In the pond, the fish and grass carp can be fed with green feed half an hour before the yellow catfish are fed to avoid competing with the yellow catfish. 4.2 Daily Management Feed Feeding Feeds must be “uniform, full, and good”. That is, according to the amount of fish fed, feed it evenly every day; the amount of feed can meet the growth needs of the fish; feed that is not fed with mildew and spoilage. Water Quality Management Water quality directly affects the growth of stingrays. The dissolved oxygen is sufficient, the water quality is fresh, and the stingray grows well. Change the water quality every 10-15d depending on the quality of the water, change the pool water about 1/3 each time, it is best to add an aerator in the pond to improve the water quality, increase the dissolved oxygen, and provide good growth for the stingray. Ecological conditions can also prevent fish floating heads and increase adult fish production. Daily management can be summarized as "four diligence." That is, ponds are patrolled, diligently weeded and decontaminated, and hard-working dead fish are frequently killed. At the same time, it also depends on the weather conditions to start the aerator. 5. If there is no special feed for stingray in the pond and there is no sufficient supply of small fish and shrimp, the yellow sturgeon winter piece can be set in the pond of the fish at home, and the stocking density is 80-100/667m, after 5-6 months. Aquaculture, about 15g of winter tablets can grow to about 100g, every 667m2 can produce stingray commercial fish about 10kg. Stingray spawning rarely suffers from bacterial disease, but it is prone to parasitic diseases. Fish should be regularly checked and treated with medication. 6, fish disease prevention and control of fish disease is an important part of pond culture. We must adhere to the principle of "prevention from prevention, prevention and control from integration," and fish species must be sterilized before stocking. The day-to-day management needs to be done. (1) Water disinfection: In the epidemic season of fish diseases, 1 g bleaching powder 1g/m3 or quicklime 25g/m3 should be splashed every 10 days. (2) Disinfection in the food field: Flush the feed table or spray and disinfect it above the feed table every 3-5 days. (3) Tool disinfection: Strictly sterilize the tools used in aquaculture production. (4) The feed to be fed should be fresh and clean, and should not be fed with rotten or unclean feed.

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