First, the pond ponds that choose to breed blackfish should not be too large. The general area is 3 acres to 5 acres. The depth of the pond is 1. 5-2. 0 meters, the thickness of the pot is 15 centimeters to 20 centimeters, the water source is sufficient, and drainage is convenient.
Second, the specifications of the fish species to be invested in fish are based on the market fish specifications. At present, the blackfish have a good market weight of 0.7-2.0 kg. Therefore, the size of the fish stock should be 75-100 g per tail.
Stocking densities should be determined based on feed sources, feeding techniques, etc. Generally, 2000-2500 fishes are put into each acre. At the same time, 400-500 fishes can be reared and the size of fish species is 100-150 grams per tail.
Third, feed feed blackfish is a fierce, practical fish, eat both live food and eat dead food. Artificial feeding, timing, domestication and feeding methods. Feed twice a day. At 10 a.m. and 3 p.m., general fish species will be able to float to the surface after 5-7 days of feeding. When feeding, observe carefully the feeding conditions of the black fish near the food table. If there is less black fish near the food table and the feeding is not intense, it means that the fish is full and you can stop feeding.
Fourth, feeding and management blackfish large diet, excrement and more quickly make the pond water become fat. Fertilizer can make plankton grow in large quantities, and it can easily cause oxygen deficiency in the pond water. Therefore, special attention should be paid to the change of dissolved oxygen in the water. In the event of severe hypoxia, some methods of water surface killing can be used, ie, splashing worms at a depth of 2-3 m on the side of the pond, at a concentration of 0.5-1.0 ppm.
Blackfish have strong resistance to disease and rarely get diseases during the artificial feeding process. However, in the late autumn, blackfish can also become ill if poor management, insufficient feed, and severe water environment are encountered. Therefore, this stage must be carefully observed, once the disease should be treated promptly.
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