CATDOLL : CATDOLL: How to breed catfish

Yellow catfish belongs to the order Siluriformes, genus Pelteobagrus, commonly known as yellow thorn fish, yellow croaker, yellow croaker, etc.

, single breeding

1. Pond selection, cleaning and disinfection: Choose a fish pond with good water quality, sufficient water source and no pollution, with an area of ​​2-10 mu, a pond water depth of 1.5m-2.5m, and equipped with mechanical equipment such as aerators. Remove excessive silt (the silt at the bottom of the pond should not exceed 10cm), expose it to the sun for several days, and then clean and disinfect it. 10-15 days before stocking, use 50-75kg of quicklime or 7-10kg of bleaching powder per mu to dissolve and slurry and sprinkle it throughout the pond. Apply fermented organic manure of 150-200kg/mu to improve water quality.

2. Fish stocking and species matching: In March and April of the same year, the stocking specifications are generally above 20g/fish, and the stocking density is generally 2000-3000 fish/mu. The stocked fish species are required to be uniform in size, bright in color, smooth in body surface, free of disease and injury, intact in fins, and strong in physique. Before stocking, the fish species are soaked in 3-5% salt water for 10-15 minutes. Half a month later, the summer flower fish species of silver carp are matched, with 1000 silver carp/mu and 3000 bighead carp/mu.

3. Feeding: Pelteobagrus fulvidraco is an omnivorous fish that mainly feeds on animal feed. It can be fed with fresh animal feed, such as small fish, shrimp, livestock and poultry scraps, snail and clam meat, etc. It can also be fed with bean cake, peanut cake, bran, etc. Or you can buy full-price Pelteobagrus fulvidraco and feed it with feed. Feeding adopts the "four fixed" principle, feeding twice a day, feeding at 2% to 2.5% of the fish weight before May, feeding at 4% to 5% of the fish weight from June to August when the water temperature is high and Pelteobagrus fulvidraco is at the peak of vigorous growth; after September, the water temperature gradually drops, and the feeding amount of concentrated feed gradually decreases, and it should be flexibly controlled according to the fish's feeding and weather changes.

4. Water quality regulation and disease prevention: Yellow catfish has high requirements for water quality. It is necessary to maintain the water transparency of 35 to 45 cm and the pH value of 6.5 to 8. In May and June, water should be added once a month, and 30 cm of new water should be added each time; from June to September, water should be changed once every half a month, and about 15 cm of water should be changed each time, and the water depth should be kept at 1.2 to 1.5 m. The aerator should be turned on regularly to increase the dissolved oxygen in the water. Adhere to the principle of "prevention first, prevention and control combined" to carry out disease prevention and control. Use quicklime, bleaching powder or other drugs for disinfection regularly to kill bacteria, viruses and other pathogenic microorganisms in the pond. Yellow catfish is a scaleless fish and is more sensitive to drugs. Trichlorfon, copper sulfate and other drugs should be used with caution.

2. Raising

(I) Trapping is the main method of raising adult yellow catfish at present. It has the following advantages: First, it can eat fish bait, small fish, organic debris, etc. in the pond, which can improve the purification capacity of the fish pond. Second, yellow catfish eats large parasites in the water, which can reduce the occurrence of fish diseases. Third, on the basis of not affecting the yield of the main culture species, the yellow catfish can be increased by 20kg per mu, and the per mu increase benefit is more than 100 yuan.

1. Fish ponds. Fish ponds that breed the four major carps and fish ponds that mainly breed grazing fish can be used to breed yellow catfish. The fish pond area is 2-30 mu, the water depth is 1.5-2.0m, and generally 40-50 yellow catfish are placed per mu, with a size of 3-4cm, and the income per mu can increase by about 10kg.

2. Cultivation of adult crabs in ponds. Cultivating yellow catfish in crab ponds can make full use of the biological resources of bait in crab ponds. Generally, the area of ​​crab ponds is 30-50 mu, and the coverage rate of aquatic plants is about 50%. After the crabs are released, 30-50 yellow catfish of 3-5 cm are released per mu, which can increase the income by 8-10 kg per mu.

3. Large water surface culture: Generally, 40-60 yellow catfish are placed per mu, with a size of 3-4 cm, which can increase the yellow catfish yield by 10-15 kg per mu.

(II) Precautions for raising:

1. Maintain a high level of dissolved oxygen in the water.

2. Maintain reasonable stocking density and specifications.

3. It is not suitable to culture other carnivorous fishes after culturing yellow catfish; it is not suitable to culture yellow catfish in ponds that breed freshwater swamp shrimp and freshwater crayfish.

4. During the culture process, pay attention to the feeding and growth of the yellow catfish. If the size of the fish is too small, add small fish and shrimp or feed it with artificially prepared special bait. When feeding artificial bait, feed the main species first and then the yellow catfish.

5. When raising yellow catfish in crab ponds, there must be sufficient natural bait in the crab ponds. You can also put 300-400kg of snails and some pregnant crucian carp and shrimps per acre in the crab ponds in advance to allow them to reproduce naturally and provide free food for river crabs and yellow catfish.