Misgurnus anguillicaudatus is small and slender, with a nearly cylindrical front end! The abdomen is round and the back end is flat. The ratio of height to body length is 1.7: 8.
The head of Misgurnus anguillicaudatus is sharp, the snout protrudes forward, the inclination angle is large, and the snout length is smaller than the back of the eye. Small mouth, inferior, horseshoe-shaped. The lips are soft, with fine wrinkles and small protrusions. The eyes are small, covered by membrane, and the upper vision is underdeveloped. Branchial fissure stops at the base of pectoral fin.
The body surface of loach is rich in mucus. The back of the body and more than 2/3 parts of the body side are grayish black with black spots, and the lower part of the body side is grayish white or yellowish. The body color of loach living in different environments is slightly different.
The dorsal fin of Misgurnus anguillicaudatus has no hard spines, and there are 3 undivided fins and 8 branched fins, * * *1/fin. The dorsal fin is opposite to the ventral fin, but the starting point is before the ventral fin, which is about the midpoint between the posterior edge of the anterior gill cover and the base of the caudal fin. The pectoral fin is far away from the ventral fin, and the ventral fin is short, starting from the middle and back of the dorsal fin base, and the ventral fin is less than the gluteal fin. The caudal fin is round. The pectoral fin, ventral fin and gluteal fin are grayish white, while the caudal fin and dorsal fin have small black spots, and there are obvious black spots above the base of caudal fin.
Practical technology of loach culture 1. grow seedlings
Pond condition
The area of the nursery pond is about 600 ㎝, and the depth of the pond is about 50㎝. It is best to have a soil pond, and the soil at the bottom of the pond should be compacted. Some gramineous plants (such as ryegrass and reeds) can be planted around the pond about 1cm away from the shore for shading. Sprinkle quicklime (150Kg/ mu) on the whole pond before the seedlings enter the pond. When the water in the pond is green, the seedlings can be put in.
Seedling stocking
Loach seedlings, whose body length is about 7mm, the yolk sac disappears and can swim freely horizontally, is put into the pond for culture at the stocking density of 800- 1000 ㎡.
Bait management
Loach seedlings, who just got off the pond, just needs to feed some digestible concentrated feed such as cooked egg yolk, bean powder and bean cake. When the seedlings grow to 1cm, they can already prey on insects in the water. At this time, you can feed some cooked wheat flour, chaff and chopped fish and shrimp, 3-4 times a day. At the same time, it is necessary to fertilize and water in time, and some fertilizer products can be sprinkled to adjust the water quality.
2. Adult loach culture
Pond condition
The area of loach adult fish culture pond is 1000- 1500m2, and the pond depth is about 1m, which can be used in both soil pond and cement pond. Because loach likes to dig holes, it is necessary to compact the soil at the bottom of the earth pond to prevent loach from escaping, and at the same time, to block the water inlet and outlet with dense mesh.
Adult loach stocking
Generally, loach seedlings with healthy constitution, no trauma and strong mobility is selected for stocking. Disinfect the pond with quicklime before stocking. If there are a lot of pests in the pond, use trichlorfon to kill insects. Generally, 400-500Kg of loach seedlings with the specification of 100- 150 fish/㎏ is stocked in the pond from the end of April to the beginning of May, and the suitable water temperature is 15℃-20℃. Too low or too high water temperature will affect the survival rate of loach fry.
Misgurnus anguillicaudatus culture: five steps of daily management of Misgurnus anguillicaudatus culture
Bait management
2-3 days after stocking, a small amount of animal feed, such as earthworms, small miscellaneous fish, livestock scraps, etc., is fed only once a day at the beginning, and the feeding amount is 1/20 of the total weight of loach. When the water temperature rises slowly, the feeding amount should be gradually increased. When the water temperature rises to 25℃, the loach's appetite reaches its peak. At this time, you can feed it twice a day, each time. When the water temperature is lower than 10℃ in winter, it is not necessary to feed loach. At this time, the depth of the pool water should be appropriately reduced, or a layer of straw should be laid at the bottom of the pool after the pool water is drained, so that the loach can safely overwinter.
3. Culturing adult loach in paddy field
Paddy field conditions
The paddy field for raising loach is not easy to be too large, and 1000㎡ is generally suitable. The periphery of the ridge should be heightened and reinforced, and it is best to block it with a dense mesh with a height above 1m to prevent escape. The water inlet should be washed at the top of the ridge, and the water outlet should be selected at the lowest part of the ridge. At the same time, when it is hot in summer or applying pesticides and fertilizers, we should dig several 2-3㎡ soil ponds with a depth of about 50cm in the rice fields as loaches.
Adult loach stocking
Generally, loach fry are stocked at the beginning of rice cultivation (early June). Disinfect with 3%-5% salt water before stocking, and stock 20,000-25,000 loach seedlings, 500-60/kg after 3-4 days.
Misgurnus anguillicaudatus culture: loach seedlings is cultured in muddy water. The three-dimensional ecological culture of Misgurnus anguillicaudatus, cattle and rice has high benefits, with an annual income of 3 million yuan.
Bait management
The feeding method of loach culture in rice field is basically similar to pond culture. It should be noted here that pesticides should be used as little as possible in paddy fields, and high-quality pesticides with high efficiency and low toxicity should be selected and sprayed on cloudy days. At the same time, because there is less water in rice fields than in ponds, more attention should be paid to the quality of fresh water to prevent excessive feeding and fertilization from affecting the water quality.