How much is the price of eel fry from 2019 to 2020? What are the techniques of artificial culture?

Eel is rich in nutrition, delicious taste, culture value has been very high. Do you know the price of eel fry from 2019 to 2020? What are its artificial breeding techniques?

1. How much is the price of eel fry in 2019-2020?

The species of eel fry are mainly divided into white eel and river eel, in which the price of white eel is higher, the price of one is about 30 yuan, and the number of river eel is more, so the price is lower than that of white eel, and the price of one is between 5 and 16 yuan. However, the variety and quality of eel fry vary from place to place, the price will fluctuate slightly, and the actual price will be determined according to the quality of the local eel fry.

II. Artificial culture techniques of eel fry

1. Control water quality: it is best to place cages near the estuary where the water surface is open, the wind speed is small, and the water depth is more than 4 meters at low tide. It is best to control the water temperature at 8: 30 ℃, and the water with a velocity of 0.5m / s is the most suitable. If not, the flow rate should be less than 1m / s. In terms of water quality requirements, the specific gravity of 1.01 to 1.02, dissolved oxygen of more than 5 mg per liter and pH value of 7 to 8.5 are the most suitable.

2. Choose the cage: use 3 × 3 × 3 m or 6 × 3 × 3 m jointless net cage, with 1 × 0.5 × 1 m multi-layer grid as the rest table, and the cage open with 15 cm anti-escape eaves.

3. The release density of fish fry is 150 pieces per square meter, and if there is no young eel, the density of black eel is 500 pieces per square meter. Eel fry should be sterilized with medicine bath before release to prevent infection.

4. Feed feeding: except for feeding once at 8 pm every day in early spring and winter, feeding once at 5 am and 8 pm every other time. Feed on a fixed bait table. The feed uses the full-price compound feed of eel with multi-vitamins. The total daily feeding amount varies at any time according to the eel growing period, 15% of the feeding amount in the adult period, 3% in the young stage, about 5% in the black eel stage, and 0.51% in the high temperature and overwintering period.

5. Box-by-box management: the density of eel has greatly increased after about a month of feeding, and the individual differences in growth are relatively large, so it is necessary to select sub-box feeding and management in time. Generally, it is separated by physical strength and individual size, and the operation in the process of screening should be careful and meticulous to avoid bruising the fish.

6. change the box regularly: in order to keep the cage clean, prevent disease and ensure the smooth exchange of water, the cage should be changed in time, once every 10 days in summer and autumn, and every 50 days in early spring and winter. the replaced cage should be cleaned for next use.

Daily management: carry out grouping management on the cage, test the water quality every day, record the meteorology, water temperature, bait and other details, and observe the feeding and growth of eels. Once problems are found, they should be dealt with in time.

Eel is a valuable fish in freshwater culture, and it has rapid growth and strong adaptability, and the technical requirements of artificial culture are not high. as long as the culture method is obtained, it is not difficult to obtain high yield and high efficiency of eel culture. interested aquaculture friends can give it a try.