Stingray, also known as Huang Lading. It belongs to the omnivorous benthic fish, hi cluster, inhabits the bottom of the water body, and feeds and activities under low light conditions.
The fry cultivation fry cultivation pond has an area of ​​10-20 square meters, a water depth of 0.7 meters, a rectangular shape, a flat bottom, a tiled bottom or a cement grind.
Freshly hatched larvae can stock 5,000-8,000 tails per cubic meter of water, 1-3 cm of fry, with a density of 3000-4000 fish per cubic meter of water; fry 3-5 cm, stocking volume per cubic meter of water 2000-3000 tails.
Adhering to the "four definite" feeding principle, according to the size of the fish, feed natural feed and artificially combined with micro-particle feed or artificial mixed powder feed.
Streamed cement pools intensively cultivate fish fry with higher stocking densities and more impurities and excrement. It is necessary to regularly suck the bottom dirt with a straw. Check whether the fry is sick every day and find out that the disease should be promptly taken measures for treatment.
Stingray ponds raise stingrays into fish ponds within an area of ​​3 acres and a water depth of 1.5-2.0 meters. The sandy soil at the bottom of the pool requires water conservation and fertility. Import and export water should be set aside to prevent fleeing the net and prevent the fish from fleeing into the fish pond.
Level the bottom of the pond and dig a hole culvert about 20 to 25 centimeters deeper than 50 square meters at the bottom of the drain end to facilitate adult fishing. Disinfect the wild fish before disinfecting it with lime.
Stocking density is generally about 3 cm in size of the fry, the amount of stocking is 5000-6000 per mu; 4-5 cm in size of fry, stocking capacity is 4500-5500 per mu.
The feed for the sturgeon adult fish includes pure animal feed and artificial feed. Pure animal feed: including small trash fish, shrimp, aquatic terrestrial carp and so on. Artificial compound feeds require 38-40% crude protein.
Adhere to the "four set" and "four look" feeding principle. The daily feeding amount is determined according to the relationship between the overall weight of pond yellow catfish and the water temperature. When the water temperature is 10-15°C, the feeding amount accounts for 1.5-1.8% of the body weight; when the water temperature is 15-20°C It occupies 2-2.5% of body weight and 4-5% of body weight when water temperature is 20-36°C.
Do a good job in the day-to-day management of ponds such as feed management, water quality management and fish disease control. Thoroughly inspect the ponds, diligently weeding and decontamination, and thoroughly fish the dead fish to make records.
Stingray Net cages Feeding cages Stingrays can either be raised on large water surfaces to provide large floating cages, or ponds can be set up for small cages. Here, we focus on the establishment of cages for small cages. .
The ponds that set up the cages require sufficient water, fresh water, an area of ​​5-10 acres and a water depth of 2-2.4 meters. Prior to erecting the cages, the ponds should be thoroughly cleared with drugs such as quicklime or bleach.
The cages are made of polyethylene mesh sheets. The mesh size is 1-1.5 cm. The cage size is generally 422 meters. The cage is fixedly formed with 6 bamboo baskets and inserted into the pond. The setting area of ​​the cage does not exceed 50% of the total area of ​​the pond.
Stingrays are usually stocked from the beginning of June to the end of July, stocking specifications are generally more than 5 cm, and stocking densities are generally 500-600 yellow sturgeon fry per square metre of stocked fish. When fry are stocked, strict fish disinfection is required to kill the surface parasites and pathogenic bacteria.
Feed feeding. It is necessary to feed the feed strictly in accordance with the "four-determined" feeding method and cannot feed the feed with spoilage. Pure animal feed can be directly pelleted and fed into pellets; compound feed can be fed by a small number of methods. 2-3 shots a day, and the feed amount is 4-5% of the fish's body weight.
The ponds that set up the cages should be filled with new water regularly, and the whole pool should be splashed with lime regularly to improve the water quality. Check the box twice a day sooner or later to check whether the cage is damaged; regular use of 0.04% iodine-contaminated salt and 0.04% sodium bicarbonate mixture in the cage shall be used to disinfect; timely remove the bait; clean the net regularly Keep cages in good water exchange.
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