Yellow eel (scientific name: Monopterus albus), also known as eel, field fish, field fish, long fish, blood fish, luo fish, no salmon, its wide distribution, high yield, delicious meat, with special flavor, well received by the masses.
Yellow eel, rounded, slender, snake-shaped; fine tail tip, well-developed peristal, with fine teeth on the top and bottom; small eyes, covered by skin membrane; left and right gill holes are connected on the ventral surface, the body has no scales; no even fins, and the odd fins degenerate only to leave inconspicuous skin folds.
Yellow eels usually inhabit rivers, lakes, ditches, ponds and rice paddies, burrowing, lurking in caves during the day, burrowing out at night for food, and are carnivorous. It can swallow air, assist breathing with the epidermis of the flesh wall of the mouth and throat cavity, adapt to the lack of oxygen water, and is not easy to die from the water. Yellow eels have sexual reversal characteristics, before sexual maturity is female, after spawning, the ovaries gradually become sperm nests, female eels reach sexual maturity The smallest individual is about 340 mm long. Spawning is in caves, and broodstock have the habit of protecting eggs.
At present, the common culture modes are: ordinary pond culture mode, cement pond culture mode, rice field culture mode and cage culture mode. The following is a brief explanation of cement pond culture mode, rice field culture mode and cage culture as examples:
Characteristics of cement pond culture mode:
Aquaculture cement pond water change dredging thoroughly, sprinkle liquid without dead ends, good effect on the prevention and treatment of diseases; in the low temperature season the water temperature is higher than the earthen pond, is conducive to prolonging the feeding period, its growth is faster; cement pond use cycle is long, a pond can be used for more than ten years or even decades. Cement pond culture has the advantages of easy observation, low labor intensity in fishing and other operations.
Characteristics of rice field culture mode:
Rice field farming yellow eel mutually beneficial symbiosis: on the one hand, the yellow eel plays a role in loosening the soil for rice; on the other hand, the manure of the yellow eel provides fertilizer for rice, which also provides habitat and shade for yellow eel. Rice field breeding of yellow eel is based on stable grain production, effectively improve the comprehensive efficiency of rice field. Rice field farming has the advantages of small investment and low technical requirements for breeding.
Cage culture mode features:
The water flow in the aquaculture cage passes through the mesh hole, so that the box body forms a living water environment, so that the water quality is fresh, the dissolved oxygen is abundant, and high-density intensive culture can be implemented. Cage culture has the advantages of small investment, convenient transformation of fish ponds, large scale flexibility, simple operation and management, easy control of water temperature, and high survival rate of aquaculture.
According to the 2019 Fisheries Yearbook, among the major fish produced in freshwater aquaculture in the country, the output of yellow eel in 2018 was 319 000 tons, of which Hubei had the highest output, reaching 146996 tons. In addition to the culture of yellow eels, the total amount of wild yellow eels caught from natural waters every year is also quite large, and the price of wild yellow eels in the market is generally higher than that of farmed yellow eels. So how to distinguish between farmed and wild yellow eels? (It is recommended not to simply look at the body color distinction, it is easy to misjudge) Please refer to the following table:
Farmed yellow eel: the individual is relatively fat, especially the tail is flat and wide; the muscles are loose, and the grasping feels weak;
Wild yellow eel: the individual is relatively thin, especially the tail is sharp and slippery; muscular, and the grip feels very strong.
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Old Wu family wild yellow eel (1 pound 2 size) large eel each about half a pound of scaleless male son field eel ¥85 to buy