CATDOLL : CATDOLL: Can duck-billed fish be raised in greenhouses?

1. Can duck-billed fish be raised in greenhouses?

American spoonbill sturgeon, also known as duckbill sturgeon, origin: native to the United States, introduced to my country in 1988, and now successfully carried out artificial breeding and seedling production. Living environment: living water temperature 0 ~ 37 ℃, the most suitable water temperature 20 ~ 24 ℃, pH value 6.5 ~ 8, dissolved oxygen 5mg / L or more. Diet: omnivorous. Recommended reasons: 1) Fast growth: duckbill sturgeon is one of the fastest growing sturgeons among freshwater fish. The fry hatched in the same year can reach an average body length of 9 cm after 25 to 30 days of cultivation. Under sufficient food conditions, the young fish can reach more than 50cm and weigh more than 500g in the first year. Generally speaking, it grows normally for 100 days and the total length can reach an average of 25cm. The average weight of the seedlings raised by the end of the year is about 1kg, and the second-year individuals can reach more than 3kg. 2) Wide temperature range: The living water temperature is 0 ~ 37℃, it can live in the frozen water in the north, and can also live normally in Guangdong summer ponds (32℃ pond bottom, 35℃ water surface), so it can be bred in basically all parts of the country. 3) High price: At present, the market price of Chinese sturgeon above 500g in Sichuan is about 60 yuan/kg, 33 yuan/kg in Guangzhou, and 50 yuan/kg in Hubei. The price varies greatly from place to place.

2. I want to raise duck-billed fish, but I don’t know where to buy duck-billed fish fry in Gansu?

How much do you need? We can deliver. We sell fish fry in Kaifeng, Henan. We have delivered fish fry to Gansu many times.

3. What temperature is suitable for breeding duckbill fish?

The temperature range of the duck-billed fish is wide, and it is not afraid of low temperatures, but can also tolerate high temperatures. In winter, even if the water surface is frozen, as long as there is sufficient dissolved oxygen in the water, it can live in the water under the ice; in summer, the surface water temperature of the pond often exceeds 35°C, and the duck-billed fish can still grow normally.

The temperature can be between 2 and 37°C, with the optimum being between 25 and 32°C.

The duck-billed fish has a wide range of temperature adaptation. It is not afraid of low temperatures, but can also tolerate high temperatures. In winter, even if the water surface is frozen, as long as there is sufficient dissolved oxygen in the water, it can live in the water under the ice; in summer, the surface water temperature of the pond often exceeds 35°C, and it can still grow normally!

4. Artificial breeding technology of Guangdong duck-billed fish?

1. Food

The sources of food for duck-billed fish are wide, and they mainly eat some zooplankton and cladocerans. Water fleas are the favorite of duck-billed fish. Sometimes they also eat some small mosquitoes and insects by the water as food. When the body length of the young fish does not reach 12 cm, it can eat plankton or small fish and shrimp to grow. When the body length of the young fish is over 12 cm, the various movement and digestive organs of the fry have been fully developed, and they have certain capture capabilities. They can catch fast-swimming copepods to eat. In the later stage, when the size is larger, you can feed some granular feed. It is enough to feed about three times a day. The specific feeding situation depends on the growth of the fish, the weather

2. Breeding location

Duck-billed fish are chosen to be farmed near reservoirs. Although they do not like to swim, a larger breeding area is still needed to be more suitable for their growth. Generally, the water depth should be more than six meters, the dissolved oxygen in the water should be around 7 to 9 mg/L, and the pH value should be between 7 and 8.5 to ensure that the water quality is suitable for the growth of duck-billed fish.

3. Cage

The setting of the net cage for duckbill fish is similar to that of silver carp. It is selected in an area with many planktons, where the water flow nearby is gentle and flat, and in a relatively quiet place that is sheltered from the wind and facing the sun. The cage frame is made of a simple bamboo frame, and the material of the cage body is made of polyethylene knotless mesh. The size of the cage is controlled at 5 meters * 5 meters * 2.5 meters, and the mesh is 2.5 cm. Because duckbill fish do not like direct sunlight, a layer of black film can be covered on the surface of the cage. The growth rate of duckbill fish is relatively fast in the later period. It is necessary to do a good job of timely separation of boxes according to the growth situation to avoid polarization, which is also conducive to improving the survival rate of fry. And it is necessary to inspect the cage frequently. The leftover food and bait in the cage should be handled in time and the cage should be cleaned regularly to prevent the mesh from being blocked and not conducive to the exchange of water inside and outside the cage. In case of stormy weather, the cage should be reinforced in advance, and the black film and anti-theft net should be inspected, and the damaged ones should be repaired in time.

4. Seedling selection

Select good fry that are fat, active, healthy, and of the same size as the fingerlings. Generally, fry about 10 cm long are enough, and 30 per square meter is enough. The water temperature should be adjusted appropriately according to the situation. Generally, the temperature difference should not be too large when the fry enter the cage. It should be controlled between -2 degrees and 2 degrees, and the temperature should be adjusted to the same as much as possible. And before entering the cage, the fry should be disinfected with 2% salt water.

The platypus is one of the fastest growing fishes, and it saves a lot of bait when raised. If it is raised in a ensemble, it does not need to be fed separately. Because its growth habits are similar to those of the silver carp, it is not good at jumping, so it is very simple to catch it in the later stage.

5. How to raise platypus fish?

1. Build a pond



If you want to breed duckbill fish, you must start with the construction of the pond. The pond is preferably a cement fish pond with a cement bottom. The maximum size should not exceed 5 acres, the water depth should be about 1.5-2 meters, the water quality should be clear and pollution-free, and an aerator should be built beside the pool to ensure that the inlet and outlet are unobstructed and convenient for daily water changes.

2. Stocking fish

Before releasing the duck-billed fish, pour fermented farmyard manure such as human and animal feces and fertilizer into the pond, stir it evenly, and then plant some aquatic plants. Wait for the plankton in the pond to grow and develop. The water color should be clear yellow-green, and the visibility should not exceed 30 cm. After about 10 days of fermentation, you can release the seeds.

3. Prepare bait

The duck-billed fish is not very picky about bait, but the algae and plankton in the fish pond alone cannot meet the growth and development needs of the duck-billed fish. It still needs to be fed artificially. Generally, it is fed once in the morning and afternoon every day. The bait is mainly artificial floating material made of various proteins.

4. Water replacement

The breeder should inspect the fish pond every day and keep records of the fish to prevent the fish from floating, getting sick or escaping. Every 15 days or so, inject about 20-30 cm of new water as a replacement, and turn on the aerator in time to increase the dissolved oxygen content in the water. Fertilizer should be added once every 15 days to ensure the nutrient supply of natural bait in the water.

6. How many duck-billed fish can be raised in one square meter at high density?

2000.

1. The stocking density of duck-billed fish varies with the size of the fish. Generally, the stocking density of duck-billed fish fry with a size of about 10-15 cm is 20-40 per square meter. One mu = 667 square meters, which means that 13340-26680 duck-billed fish can be raised in one mu. When the duck-billed fish grow up, it is usually more appropriate to raise 2000 duck-billed fish per mu.

2. In general, when the duck-billed fish is small, the stocking density can be appropriately larger. When the duck-billed fish grows up, the stocking density should be gradually reduced.