Techniques of artificial Culture of Pelteobagrus fulvidraco

Pelteobagrus fulvidraco, also known as Pelteobagrus fulvidraco and Pelteobagrus fulvidraco, is a water-based fish with strong adaptability and can be cultured in all kinds of waters. Easy to raise, high price and good benefit. Its tender meat, delicious taste, is a high-quality aquatic products, more and more loved by the majority of consumers.

Pelteobagrus fulvidraco likes to live in still water or slow water, and its survival temperature is generally 0 ℃ ~ 39 ℃. The most suitable water temperature for growth is 22 ℃ ~ 28 ℃. Under natural conditions, fish larvae that have just hatched for 3 to 5 days absorb their own yolk as nutrition. In the seedling stage, rotifers, small cladocera, water earthworms and other aquatic worms were used as bait to artificially cultivate minced small fish, shrimp and molluscs, or compound feed.

In general, Pelteobagrus fulvidraco is sexually mature at 2 years old in females and 3 years in males. The peak breeding period is 23 ℃ ~ 26 ℃, and the number of eggs per fish is 4000 to 6000 eggs. Like carp and crucian carp, they are sticky and sinking eggs. The fertilized eggs usually hatch their larvae after 72 hours at a water temperature of 24 ℃ ~ 26 ℃. There are two ways of artificial culture of Pelteobagrus fulvidraco: monoculture and mixed culture.

The main measures for monoculture are as follows: select ponds with fresh water quality, rich dissolved oxygen, convenient access and drainage, with an area of 2 to 3 mu and a water depth of 1 to 2 meters, install drainage fences and protective nets, and remove silt from the ponds and disinfect them with quicklime and bleaching powder. 2500 to 3000 winter slices of Pelteobagrus fulvidraco with a length of about 3 centimeters per mu and 100 to 200 silver carp with a body length of 12 centimeters can also be set up. After stocking, feed fresh earthworms, clam meat, small fish, shrimp and other animal bait, daily feeding amount of fish body weight 3% to 6%. In the summer and autumn high temperature season, the water is changed every 7 to 10 days, with a depth of 30 to 40 centimeters each time, and the transparency of the pool water is kept at 35 to 40 centimeters. In order to prevent the occurrence of fish disease, the fish should be medically washed during stocking, usually with 10ppm potassium permanganate or 2% to 4% salt solution for 5 to 10 minutes. During the feeding period, the whole pool was sprinkled with bleach and quicklime every 15 to 20 days to make the pool water reach the concentration of 1.2ppm and 10ppm, respectively. Every month, rhubarb, Radix Isatidis and other traditional Chinese medicine were used to make bait with 0.1% to 0.4% additive amount, and the bait was fed for 3 to 5 days. At the same time, fish damage should be avoided in fishing, release and transportation, so as to prevent water mildew infection in early spring, autumn and winter. The yield per mu of monoculture can reach 200 to 300 kg.

The method of mixed culture is to put 100 to 200 species of yellow croaker with more than 3 centimeters per mu in the surface of the four major domestic fish or special aquatic products such as tilapia, river crab and soft-shelled turtle, such as net enclosure and pond. Under the premise of not affecting the yield of the main species, 20 to 30 kg of Pelteobagrus fulvidraco with tail weight of 150 to 200 grams per mu can be obtained. Mixed culture of Pelteobagrus fulvidraco can not only reduce the number of small miscellaneous fish and shrimp competing with the main fish, increase the yield of the main species, but also effectively control parasitic diseases such as anchored fish.