What are the breeding technologies of semi smooth tongue sole, and what are the key technologies for

1) The choice of the farm is very important, it is best to choose the water source is abundant, pollution-free, the water quality is good, the water temperature is appropriate, and the underground well water with suitable hydrological conditions is better. The insurance coefficient of indoor greenhouses and factory farming is high, and shrimp ponds and ponds can also be used for outdoor farming, so that the semi-smooth tongue sole can directly ingest natural bait and grow faster.

2) Pond construction conditions: There is no special requirement for the shape and structure of the pond for the industrial cultivation of semi-smooth tongue sole, and the existing pools for breeding flounder and turbot can be fully suitable for the commercial fish breeding of semi-smooth tongue sole.

3) The stocking density of semi-smooth tongue sole in the stocking density pond is determined according to the water quality conditions (dissolved oxygen, etc.), a cherry-like factory culture of 3 15 kg per square meter or 100 200 seedlings per square meter of stocking body length of more than 8 cm, shrimp pond culture per mu stocking 40 60 kg.

4) Let the shirt bait semi-smooth tongue sole swim slowly, accustomed to day and night, evenly distributed in the pool, most of them stick to the bottom of the pool, like to gather at the water inlet, which puts forward higher requirements for the feeding of the semi-smooth tongue sole with the bait, which requires the bait to be not easy to lose in the water, and must be sinking. When feeding the bait, it should be noted that the size of the bait size must be palatable. The number of baiting was higher in the juvenile stage, and the number of baiting per day gradually decreased to 2 3 times with the increase of the fish body.

5) Growth rate: The growth rate of semi-smooth tongue sole is relatively fast, and the annual growth rate can reach about 500 grams. (6) water quality management pay attention to the measurement of water temperature, timely filling or replacement of water bodies, in order to regulate and maintain the quality of aquaculture water, the daily amount of water should be changed according to the density of breeding, pool water quality conditions, generally high temperature period 6 8 cycles per day, usually 4 cycles per day, according to the bait situation to increase the amount of water exchange is conducive to maintaining water quality. Outdoor aquaculture ponds, water change once every half month, each time the water exchange is 10 20 cm, the high temperature season can be appropriately increased the number of water changes and water exchanges.

7) Light requires that the semi-smooth tongue sole likes low-light conditions, and can still feed with the sense of smell without turning on the light on the evening finger slippery bush.

8) Daily management: Regularly inspect the pond, closely observe the feeding situation, swimming, and body color of the fish, and solve the problems in time.

9) Disease prevention and control should be "prevention-oriented", timely adjustment of water exchange, regular thinning of seedlings to reduce stocking density, regular regular bathing and feeding of bait. If conditions permit, it is recommended to pour the pool once a month. Common diseases are:

Ascites disease, abdominal distension disease, rotten fins and tails, the use of conventional drugs can be used**.

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First, the choice of farms.

The choice of semi-smooth tongue sole breeding farm is very important, it is better to choose a rich water source, no pollution, good water quality, suitable water temperature, and the use of suitable hydrological conditions of underground well water. Indoor greenhouse, industrial farming insurance coefficient is higher, can also use shrimp ponds, ponds for outdoor farming, so that the semi-smooth tongue sole directly ingests natural bait, its growth rate is also relatively fast, the experiment shows that in the shrimp pond stocking semi-smooth tongue sole seedlings can grow to 450 grams on average for 5 months, it can be seen that its growth rate is fast, outdoor aquaculture, the water level requires meters, if the stocking density is larger, it can be artificially baited. The shrimp pond is designed around the bottom of the pond to dig a circular ditch of rice, which is more conducive to the wintering and summer of tongue sole.

Second, the conditions for building a pool.

There is no special requirement for the shape and structure of the pond for the industrial cultivation of semi-smooth tongue sole, and the existing pools for breeding bud flounder and turbot can be fully suitable for the cultivation of semi-smooth tongue sole.

3. Bait. Semi-smooth tongue sole swims slowly, accustomed to day and night, evenly distributed in the pool, most of the fish stick to the bottom of the pond, like to gather in the water inlet, which puts forward higher requirements for the feeding of the semi-smooth tongue sole with bait, which requires that the bait is not easy to be lost in the water, and must be sinking. The bait formula is: > 100g (10% of sand silkworms, 10% of oysters, 20% of sand diamond fish, 10% of mackerel, 50% of powder, cod liver oil 5, Hatwei 3, yeast powder, farmers can use small bait processing machines according to this formula to process bait, low cost, can enable farmers to get more profits, of course, when processing bait, the size of the bait changes less than turbot, and it must be palatable to feed.

4. Water quality management.

Pay attention to the determination of water temperature, maintain the water quality of feeding water by adjusting the amount of water exchange, the daily water exchange is determined according to the stocking density of the fish, the water quality of the cultivation pond, the general high temperature period of 6-8 cycle days, usually 4 cycle days, according to the bait situation to increase the amount of water exchange is conducive to maintaining water quality.

5. Stocking density.

The stocking density of semi-smooth tongue sole in the pond is determined according to the water quality conditions, (dissolved oxygen, etc.) is generally 5-20kg m2 for factory culture, and kg m2 for shrimp ponds.

6. Growth rate.

The growth rate of semi-smooth tongue sole is relatively fast, the annual growth rate can reach about 500 grams, and the growth rate of two-day-old fish is 200-400%, which is very close to flounder.

7. Disease prevention and control.

At present, the disease does not pose a threat to the development of semi-smooth tongue sole. In daily management, closely observe the feeding situation, swimming, body color, and whether there are abnormal behaviors of the fish, so as to detect the precursors of disease in time and prevent it. Adjust the amount of water exchange in a timely manner, regularly thin the seedlings to reduce the stocking density, regularly carry out medicated baths and feed medicated bait, if possible, it is recommended to pour the pool once a month, common diseases are:

Ascites disease, abdominal swelling disease, rotten fins and tails, the use of conventional drugs can be used**.

8. Lighting requirements.

The semi-slippery tongue sole prefers low-light conditions and can still feed with its sense of smell at night without turning on the lights.