Carp recession black fish occupies the market to solve four technical problems of black fish culture

Blackfish body is cylindrical, body length up to 0.6 meters, head length, front flat, black body, abdomen gray, irregular spots. The dorsal and anal fins are long and spineless, the ventral fins are small, and the caudal fin is rounded. In recent years, the market for black fish is popular, and black fish farming is gradually emerging. To cultivate black fish, the following four technical problems must be solved:

black fish

1. Pond selection. The pond for breeding blackfish does not need to be very large, generally 3 mu-5 mu on the line. The pond depth is 1.5 - 2.0 meters, the sediment thickness is 15-20cm, the water source is sufficient, and the drainage water is convenient.

II. Release of fish species. The specifications of black fish species are determined according to the specifications of commercial black fish in the market. At present, black fish weighing 0.7 kg-2.0 kg of good sales, therefore, stocking of black fish specifications should be 75-100 grams per tail. The stocking density should be determined according to factors such as feed source and feeding technology. Generally, 2000-2500 black fingerlings are put per mu. At the same time, it can raise 400-500 fish, and the specification is 100g-150g for each fish.

3. Feed feeding. Blackfish is a fierce carnivorous fish, live food and dead food to eat, such as small wild miscellaneous fish for food. The feeding method of artificial feeding adopts timing and fixed-point domestication. Feed twice a day, 10:00 a.m. and 3:00 p.m. Generally, after 5-7 days of stocking, black fish species can all float to the surface to grab food. While feeding, carefully observe the feeding situation of black fish near the food table. If there are few black fish around the food table and the competition for food is not intense, it indicates that the fish are full and can stop feeding.

IV. Feeding management. Black fish feed sex is big, excreta is much, pond water changes easily fat. Plankton will multiply in large quantities in the fertilizer water, causing hypoxia, so special attention should be paid to the change of dissolved oxygen in the culture pond. Once anoxia occurs, turn on the aerator in time. If there is severe hypoxia, the method of killing some plankton on the water surface can be adopted, that is, trichlorfon with a concentration of 0.5ppm~1.0PPm can be sprinkled on the water surface 2-3 meters away from the pond. Blackfish disease resistance is strong, rarely sick, but late autumn, such as poor management, insufficient feed, poor water environment, blackfish will also get sick. Because of the late autumn blackfish must be carefully observed, once the disease, timely treatment.