A domestication system and method for wild adult naked carp

Abstract

The present invention provides a domestication system for adult wild naked carp, comprising a cement pool and at least one filter tank and a temporary holding tank, wherein the filter tank and the temporary holding tank are arranged side by side above the cement pool; one end of the filter tank and the temporary holding tank are both provided with a water inlet pipe, and the bottom of the other end is provided with a drain outlet to the cement pool, and a water level pipe is threadedly connected above the drain outlet; the water inlet of the water inlet pipe is connected to the water inlet pump in the cement pool; the drain outlet of the temporary holding tank is connected to a drain pipe, and the drain pipe is provided with a branch pipe connected to the main drainage pipe of the cement pool, and a filtering device is provided in the temporary holding tank. The large-scale and standardized domestication of adult wild naked carp is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of fish breeding, and in particular relates to a domestication system for adult wild naked carp. Background Art

[0002] Oxygymnocypris stewartii belongs to the Cypriniformes, Cyprinidae, Schizothorinae, commonly known as Lhasa white fish. It lives in plateau waters above 3,600 meters above sea level. It is a species unique to my country and is only distributed in the middle reaches of the Yarlung Zangbo River and its tributaries. The diet of Oxygymnocypris stewartii is different from other Lhasa River fish species. It mainly feeds on other fish and aquatic insects. It has good meat quality and high lipid content. It is one of the main economic fish in Tibet. After the 1950s, with the continuous increase in fishing intensity, its population has dropped sharply. In 2006, the Tibet Autonomous Region listed Oxygymnocypris stewartii as a first-class key protected aquatic wild animal, and the "China Red List of Endangered Animals" also listed it as an endangered species.

[0003] In order to protect and develop this precious resource, some domestic scientific research teams and a few breeding farms in Tibet have successively carried out research on artificial breeding of sharp naked carp. Invention patent CN111642428A discloses a high-density breeding method for sharp naked carp in indoor cement pools, which is suitable for large-scale artificial breeding of sharp naked carp, but not suitable for domestication of wild sharp naked carp. At present, there is no report on the domestication of wild sharp naked carp, which is still at the bottleneck of research. Summary of the invention

[0004] The present invention aims at the problem of domestication of wild adult naked carp, and provides a domestication system for wild adult naked carp. According to the characteristics of the wild naked carp, targeted domestication is carried out, the system has strong operability and good practical applicability, and can realize the large-scale and standardized domestication of wild adult naked carp, promote the development of the wild naked carp breeding industry in Tibet, and effectively protect the wild resources of naked carp.

[0005] The technical solution adopted by the present invention is:

[0006] A domestication system for adult wild naked carp comprises a cement pool and at least one filter tank and a temporary holding tank, wherein the filter tank and the temporary holding tank are arranged side by side above the cement pool; one end of each of the filter tank and the temporary holding tank is provided with a water inlet pipe, and the bottom of the other end is provided with a drain outlet to the cement pool, and a water level pipe is threadedly connected above the drain outlet; the water inlet of the water inlet pipe is connected to a water inlet pump in the cement pool, and the water outlet of the water inlet pipe is located above one end of the filter tank or the temporary holding tank, and an oxygen increasing pump is arranged in the cement pool; the drain outlet of the temporary holding tank is connected to a drain pipe, and the drain pipe is provided with a branch pipe connected to a main drainage pipe of the cement pool, and a filtering device is arranged in the temporary holding tank.

[0007] The filter tank described in the present invention is divided into a primary filter area, a secondary filter area, a tertiary filter area, a quaternary filter area and a first drainage area in sequence according to the water flow direction by four groups of partition plates. The partition plates are composed of an upper partition and a lower partition parallel to each other. The upper partition is close to the water inlet pipe, the upper end of the upper partition is higher than the water surface, and the lower end of the upper partition is at a distance from the bottom of the tank. The lower partition is close to the drain outlet, the lower end of the lower partition is close to the bottom of the tank, the upper end of the lower partition is higher than the lower end of the upper partition and higher than the water level pipe. The water outlet of the water inlet pipe is provided above the primary filter area, and the drain outlet is provided in the first drainage area.

[0008] Preferably, filter gauze is provided on the top of the primary filter zone, and filter cotton is provided below the filter gauze; biochemical cotton or biochemical felt is provided at the bottom of the secondary filter zone, the tertiary filter zone and the quaternary filter zone, and coral sand is laid at the top.

[0009] The top of the first-level filtration area is a filter gauze, which can filter large particles of solid impurities, reduce the working pressure of the nitrification system, and reduce the frequency of cleaning the filter cotton. The filter gauze must be cleaned regularly to ensure smooth water flow; the lower part is a filter cotton, which can filter small particles of solid impurities and reduce the working pressure of nitrifying bacteria. It must also be cleaned regularly to ensure smooth water flow. The 2-4 level filtration area is a biochemical area, with biochemical cotton or biochemical felt as the main filter material, which can increase the attachment area of ​​nitrifying bacteria and decompose metabolic wastes such as ammonia nitrogen and nitrite in the water body; laying coral sand on the upper part can fix the position of biochemical materials to prevent floating, and can also be used to increase the pH value of the water body to prevent long-term circulation aquaculture water from being too acidic. The three biochemical areas are set up to take into account the two needs of convenient operation and high water treatment efficiency, and maximize the use of the filter tank space.

[0010] The temporary holding tank described in the present invention is divided into a water inlet area, a breeding area and a second drainage area in sequence according to the water flow direction by two partition meshes. The water outlet of the water inlet pipe is located above the water inlet area, and the drainage outlet is located in the second drainage area. The two partition meshes are as far apart as possible, and the filtering device is provided in the breeding area.

[0011] The filter device can be an air lift filter device or a small submersible filter pump, which can be turned on when there is no water inflow to ensure that the water in the tank has good water quality for a long time.

[0012] Preferably, the mesh size of the filter gauze and the separation gauze is 1-1.5 mm. The mesh size cannot be too large, otherwise it will not play an isolating role; nor can it be too small, otherwise it will easily block water and increase the workload. Usually, a mesh size of 1-1.5 mm can meet the needs, which can be adjusted according to the density of the fish, the amount of feeding, the cleanliness of the breeding environment, etc.

[0013] The present invention maintains the ammonia nitrogen concentration of water in the cement pool to be no higher than 0.5 mg / L, and the nitrite concentration to be no higher than 0.05 mg / L.

[0014] The water inlet pump of the filter tank of the present invention is located at the bottom of the cement pool, and the wastes deposited at the bottom of the pool are sucked up as much as possible; the water inlet pump of the temporary holding tank is 5-10 centimeters higher than the bottom of the cement pool, and the wastes at the bottom of the pool are not sucked up as much as possible; dark opaque plastic pipes are placed in the cement pool for the naked carp to hide, so that the fish feel safe as much as possible.

[0015] The filtering tank and the temporary holding tank of the present invention are made of glass fiber reinforced plastics, which are light, low in cost, sufficient in strength, and have no adverse effect on water quality.

[0016] The present invention also provides a method for domesticating wild adult naked carp, comprising the following steps:

[0017] A. Disinfection and epidemic prevention

[0018] Turn off the water inlet pump of the temporary tank to disconnect the temporary tank from the water in the cement pool, turn on the filter device, put the newly caught wild naked carp in the temporary tank, and sprinkle 20ppm oxytetracycline solution in the temporary tank for soaking. During this period, change the water in the temporary tank once a day and replace it with medicated bathing. After the medicated bathing, change the water and switch back to oxytetracycline splashing and soaking for 3 consecutive days; inject gentamicin every day for at least 3 consecutive times to prevent infection;

[0019] Preferably, the medicated bath refers to bathing the fish body in a solution containing 15‰ salt and 1‰ baking soda water for 30 minutes, which effectively prevents wound inflammation and saprolegniasis.

[0020] Freshly caught wild naked carp often have wounds on their bodies and are not adapted to artificial breeding environments. They need to be domesticated in temporary tanks for a period of time to facilitate observation, medication, etc., and to create a flowing water environment. This disinfection and epidemic prevention method can prevent wound inflammation and saprolegniasis at the same time.

[0021] Preferably, the temporary holding tank is covered to prevent the fish from jumping out.

[0022] Preferably, each time the water is changed, the water level pipe of the temporary tank is unplugged, the medicine solution is discharged to the outside of the cement pool through the branch pipe, and when the water level of the temporary tank is low, the water inlet pump is turned on to flush out the residual medicine solution, the water level pipe is re-inserted, and new water is added. This can better maintain the concentration of the medicine and ensure the treatment effect.

[0023] B. Training and opening of mouth

[0024] After disinfection and epidemic prevention, open the water inlet pump and drain outlet of the temporary holding tank to connect the water circulation of the temporary holding tank with that of the cement pool, close the filtration device, observe the flow water environment for 5-7 days, and if there is no infection, transfer it to the cement pool and start feeding; feed with fresh bait in the initial stage, and gradually switch to ice-fresh bait after stable feeding, and then switch to artificial compound feed, and mix it with farmed fish that are more aggressive in snatching food to induce feeding; when wild fish can actively eat and remain healthy without medication for one month, they are moved into large ponds for long-term breeding.

[0025] The water flow rate in the temporary holding tank can be flexibly adjusted according to the density of temporary fish and the amount of feed, so as to maintain good water quality and sufficient dissolved oxygen.

[0026] Wild naked carp is a purely carnivorous fish and has a poor acceptance of human compound feed. In the initial stage, it should be fed with fresh baits such as live plateau loach and live mealworms. After stable feeding, it can be gradually switched to dried shrimp, high-protein artificial compound feed, etc.

[0027] The beneficial effects of the present invention are:

[0028] 1. Wild naked carp live in flowing cold water areas. The traditional method uses a flow-through culture mode, that is, new water enters one end and is discharged at the other end. This method consumes a lot of water and cannot maintain the concentration of drugs, etc., which does not meet the needs of the initial domestication. This system can flexibly switch between flow-through and circulating water culture modes at any time, and does not use a long-flow water culture mode. The salinity and drug concentration of the culture water can be maintained as required; and in the early stage of domestication, it is more convenient for fish disinfection and observation, and the use process is more water-saving and drug-saving.

[0029] 2. The traditional method is long-term water culture, which maintains water quality by constantly flushing in new water. It consumes a lot of water and is difficult to maintain drug concentration. This system comes with a filter tank device, which can maintain good water quality for a long time when the fish culture density is not high. The temporary tank is small in size, which is convenient for various operations such as catching fish, injection, feeding, observation, etc. in the early stage of domestication. The temporary tank and filter tank are simple to set up, flexible and mobile. The number and location of the installation can be selected according to actual needs, and can be removed at any time.

[0030] 3. Freshly caught wild naked carp often have wounds on their bodies and are not adapted to artificial breeding environments. They need to be domesticated in temporary tanks for a period of time to facilitate observation, medication, etc., and to create a flowing water environment. The disinfection and epidemic prevention method of the present invention can prevent wound inflammation and saprolegniasis at the same time, and has a high survival rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of the wild naked carp adult fish domestication system of the present invention.

[0032] Figure 2 Schematic diagram of the filter tank structure.

[0033] Figure 3 This is a schematic diagram of the structure of the temporary holding tank.

[0034] The markings in the figure are: 1. Cement pool; 2. Filter tank; 3. Temporary holding tank; 4. Water inlet pipe; 5. Drain pipe; 6. Water inlet pump; 7. Water level pipe; 8. Drain outlet; 10. Partition gauze; 11. Filter gauze; 12. Filter cotton; 13. Coral sand; 14. Biochemical cotton; 21. Primary filtration area; 22. Secondary filtration area; 23. Tertiary filtration area; 24. Quaternary filtration area; 25. First drainage area; 31. Water inlet area; 32. Breeding area; 33. Second drainage area; 34. Filter device; 51. Branch pipe; 91. Upper partition; 92. Lower partition. DETAILED DESCRIPTION

[0035] In order to more clearly and in detail illustrate the technical solution of the present invention, the present invention is further described below through relevant embodiments. The following embodiments are only for specific explanation of the implementation method of the present invention, and do not limit the protection scope of the present invention.

[0036] Example 1

[0037] like Figure 1 As shown, a domestication system for adult wild naked carp comprises a cement pool 1 and at least one filter tank 2 and a temporary holding tank 3, wherein the filter tank 2 and the temporary holding tank 3 are arranged side by side above the cement pool 1; one end of each of the filter tank 2 and the temporary holding tank 3 is provided with a water inlet pipe 4, and the bottom of the other end is provided with a drain outlet 8 which discharges to the cement pool 1, and a water level pipe 7 is threadedly connected above the drain outlet 8; the water inlet of the water inlet pipe 4 is connected to a water inlet pump 6 in the cement pool 1, and the water outlet of the water inlet pipe 4 is located above one end of the filter tank 2 or the temporary holding tank 3, and an oxygen-increasing pump is arranged in the cement pool 1; the drain outlet of the temporary holding tank 3 is connected to a drain pipe 5, and the drain pipe 5 is provided with a branch pipe 51 which is connected to the main drainage pipe of the cement pool 1, and a filtering device 34 is arranged in the temporary holding tank 3.

[0038] One or more filter tanks 2 and temporary holding tanks 3 can be provided as needed. The water is pumped from the cement pool 1 into one end of the filter tank 2 by the water inlet pump 6. The water flows back to the cement pool 1 from the other end after passing through various filter materials in the filter tank 2. Water is pumped from the cement pool into one end of the temporary holding tank 3 by the water inlet pump 6, and flows back to the cement pool from the other end of the temporary holding tank 3. The filter device 34 is closed to make the water body of the temporary holding tank circulate and communicate with the water body of the cement pool, so as to realize the water culture in the temporary holding tank; the water inlet pump 6 of the temporary holding tank is closed, and the filter device 34 is opened, so as to realize the static water culture in the temporary holding tank, which is convenient for the use of medicine. The water level pipe 7 is connected to the top of the drain port 8 by thread, and a branch pipe 51 connected to the cement pool drainage main pipe is provided on the drain pipe 5 of the temporary holding tank 3, so as to facilitate the extraction of the water level pipe 7 and discharge the medicine in the temporary holding tank 3 from the branch pipe 51, which is convenient for changing water and will not pollute the water in the cement pool 1.

[0039] Example 2

[0040] This embodiment is based on embodiment 1:

[0041] like Figure 2 As shown, the filter tank 2 is divided into a primary filter area 21, a secondary filter area 22, a tertiary filter area 23, a quaternary filter area 24 and a first drainage area 25 by four groups of partitions according to the direction of water flow. The partitions are composed of an upper partition 91 and a lower partition 92 which are parallel to each other. The upper partition 91 is close to the water inlet pipe 4, the upper end of the upper partition 91 is higher than the water surface, and the lower end of the upper partition 91 is at a distance from the bottom of the tank. The lower partition 92 is close to the drain port 8, the lower end of the lower partition 92 is close to the bottom of the tank, the upper end of the lower partition 92 is higher than the lower end of the upper partition 91 and higher than the water level pipe 7. The water outlet of the water inlet pipe 4 is provided above the primary filter area 21, and the drain port 8 is provided in the first drainage area 25.

[0042] The setting of the upper partition 91 and the lower partition 92 helps to control the water flow from the bottom end of the upper partition 91 into the gap between the upper partition 91 and the lower partition 92, and then enter the next area through the top end of the lower partition 92, so that the water flow direction in each partition is from top to bottom, flowing toward the drain outlet, which is beneficial to the water body being fully filtered in each area.

[0043] Example 3

[0044] This embodiment is based on Embodiment 2:

[0045] A filter gauze 11 is arranged on the top of the primary filter area 21, and a filter cotton 12 is arranged below the filter gauze 11; biochemical cotton 14 is arranged at the bottom of the secondary filter area 22, the tertiary filter area 23 and the quaternary filter area 24, and coral sand 13 is laid on the top.

[0046] The mesh size of the filter gauze 11 is 1-1.5 mm.

[0047] The water inlet pump of the filter tank 2 is located at the bottom of the cement pool 1 , and the water inlet pump of the temporary holding tank 3 is 7 centimeters higher than the bottom of the cement pool 1 .

[0048] The present invention maintains the ammonia nitrogen concentration of water in the cement pool to be no higher than 0.5 mg / L, the nitrite concentration to be no higher than 0.05 mg / L, and keeps the water clean through the filter tank.

[0049] Example 4

[0050] This embodiment is based on embodiment 1:

[0051] like Figure 3As shown, the temporary holding tank 3 is divided into a water inlet area 31, a breeding area 32 and a second drainage area 33 in sequence according to the water flow direction by two partition meshes 10. The water outlet of the water inlet pipe 4 is located above the water inlet area 31, and the drainage outlet 8 is located in the second drainage area 33; the two partition meshes 10 are as far apart as possible, and the filtering device 34 is provided in the breeding area 32.

[0052] A breeding area is separated in the temporary breeding tank 3 by the separation gauze 10, which can prevent large particles of impurities from entering the breeding area and prevent fish from being discharged from the drain outlet.

[0053] The mesh size of the separation gauze 10 is 1-1.5 mm.

[0054] The filter device 34 can be a conventional air-lift filter device for aquaculture or a small submersible filter pump, which can be turned on when there is no water inflow to ensure water circulation in the tank and good water quality for a long time.

[0055] Example 5

[0056] This embodiment is based on Embodiment 3:

[0057] The water inlet pump of the filtering tank 2 is located at the bottom of the cement pool 1, and the water inlet pump of the temporary holding tank 3 is 5 cm higher than the bottom of the cement pool 1. A dark opaque plastic pipe is placed in the cement pool 1 for the sharp naked carp to hide.

[0058] Example 6

[0059] This embodiment is based on embodiment 1:

[0060] The water inlet pump of the filter tank 2 is located at the bottom of the cement pool 1 , and the water inlet pump of the temporary holding tank 3 is 10 centimeters higher than the bottom of the cement pool 1 .

[0061] The filtering tank and the temporary holding tank are made of glass fiber reinforced plastics, which are light, low in cost, strong enough, and have no adverse effects on water quality.

[0062] Example 7

[0063] The present invention also provides a method for domesticating wild adult naked carp, comprising the following steps:

[0064] A. Disinfection and epidemic prevention

[0065] Turn off the water inlet pump of the temporary tank to disconnect the temporary tank from the water in the cement pool, turn on the filter device, put the newly caught wild naked carp in the temporary tank, and sprinkle 20ppm oxytetracycline solution in the temporary tank for soaking. During this period, change the water in the temporary tank once a day and replace it with medicated bathing. After the medicated bathing, change the water and switch back to oxytetracycline splashing and soaking for 3 consecutive days; inject gentamicin every day for at least 3 consecutive times to prevent infection;

[0066] B. Training and opening of mouth

[0067] After disinfection and epidemic prevention, open the water inlet pump and drain outlet of the temporary holding tank to connect the water circulation of the temporary holding tank with that of the cement pool, close the filtration device, observe the flow water environment for 5-7 days, and if there is no infection, transfer it to the cement pool and start feeding; feed with fresh bait in the initial stage, and gradually switch to ice-fresh bait after stable feeding, and then switch to artificial compound feed, and mix it with farmed fish that are more aggressive in snatching food to induce feeding; when wild fish can actively eat and remain healthy without medication for one month, they are moved into large ponds for long-term breeding.

[0068] Example 8

[0069] This embodiment is based on Embodiment 7:

[0070] The temporary holding tank is covered for feeding; the medicated bath refers to immersing the fish body in a solution containing 15‰ salt and 1‰ baking soda for 30 minutes.

[0071] Example 9

[0072] This embodiment is based on Embodiment 7:

[0073] Each time you change the water, unplug the water level pipe of the temporary holding tank, drain the medicine out of the cement pool through the branch pipe, and when the water level in the temporary holding tank is low, open the water inlet pump to flush out the remaining medicine, re-insert the water level pipe, and add new water.

[0074] The sharp naked carp of the present invention is a wild fish endemic to Tibet, and the time for artificial domestication is very short, so the traditional domestication method is only a relatively simple and less systematic domestication process; it is mainly carried out in a long-flowing fish pond, and the fish are taken out and the fish body is bathed in 15‰ salt water every day in the early stage of domestication. After three consecutive days, feeding is started and the eating situation is observed. It is found that most individuals are transferred to ordinary breeding ponds as soon as they start eating, which is almost the same as the breeding methods of other schizothorax endemic to Tibet. However, in fact, the sharp naked carp is a species that is more difficult to domesticate than other schizothorax fish, has more diseases, and has a more monotonous diet. The mortality rate of traditional domestication methods is extremely high, and usually only a few fish in a batch can survive for more than half a year.

[0075] 60 wild naked carp were put into two temporary holding ponds respectively. One temporary holding pond adopted the domestication system and method of the present invention, and the other temporary holding pond adopted the traditional domestication method for experimental comparison. After 2 months of domestication using the method of the present invention, a total of 7 fish died, and the domestication survival rate was 88.33%.

[0076] Before domestication

[0077]

[0078] After domestication

[0079]

[0080] Domestication survival rate

[0081]

[0082] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A method for domesticating wild adult naked carp, characterized in that: The domestication system includes a cement pool and at least one filter tank and a temporary holding tank. The filter tank and the temporary holding tank are arranged side by side above the cement pool; one end of the filter tank and the temporary holding tank is provided with a water inlet pipe, and the bottom of the other end is provided with a drain outlet to the cement pool, and a water level pipe is threadedly connected above the drain outlet; the water inlet of the water inlet pipe is connected to the water inlet pump in the cement pool, and the water outlet of the water inlet pipe is located above one end of the filter tank or the temporary holding tank, and an oxygen increase pump is arranged in the cement pool; the drain outlet of the temporary holding tank is connected to the drain pipe, and the drain pipe is provided with a A branch pipe, a filtering device is arranged in the temporary holding tank; the filtering tank and the temporary holding tank are made of glass fiber reinforced plastic; the temporary holding tank is divided into an inlet area, a breeding area and a second drainage area in sequence according to the water flow direction by two partitioning meshes, the outlet of the inlet pipe is located above the inlet area, and the drainage outlet is located in the second drainage area; the two partitioning meshes are as far away as possible, and the filtering device is arranged in the breeding area; each time the water is changed, the water level pipe of the temporary holding tank is unplugged, and the medicine is discharged to the outside of the cement pool through the branch pipe, and when the water level in the temporary holding tank is low, the water inlet pump is turned on to flush out the residual medicine, the water level pipe is re-inserted, and new water is added; The steps include: A. Disinfection and epidemic prevention Turn off the water inlet pump of the temporary tank to disconnect the temporary tank from the water in the cement pool, turn on the filter device, put the newly caught wild naked carp in the temporary tank, and sprinkle 20ppm oxytetracycline solution in the temporary tank for soaking. During this period, change the water in the temporary tank once a day and replace it with medicated bathing. After the medicated bathing, change the water and switch back to oxytetracycline splashing and soaking for 3 consecutive days; inject gentamicin every day for at least 3 consecutive times to prevent infection; B. Training and opening of mouth After disinfection and epidemic prevention, open the water inlet pump and drain outlet of the temporary holding tank to connect the water circulation of the temporary holding tank with that of the cement pool, close the filtration device, observe the flow water environment for 5-7 days, and if there is no infection, transfer it to the cement pool and start feeding; feed with fresh bait in the initial stage, and gradually switch to ice-fresh bait after stable feeding, and then switch to artificial compound feed, and mix it with farmed fish that are more aggressive in snatching food to induce feeding; when wild fish can actively eat and remain healthy without medication for one month, they are moved into large ponds for long-term breeding.

2. The method for domesticating wild adult naked carp according to claim 1, characterized in that: The filter tank is divided into a primary filter area, a secondary filter area, a tertiary filter area, a quaternary filter area and a first drainage area in sequence according to the water flow direction by four groups of partition plates. The partition plates are composed of an upper partition and a lower partition parallel to each other. The upper partition is close to the water inlet pipe, the upper end of the upper partition is above the water surface, and the lower end of the upper partition is at a distance from the bottom of the tank. The lower partition is close to the water level pipe, the lower end of the lower partition is close to the bottom of the tank, the upper end of the lower partition is higher than the lower end of the upper partition and higher than the water level pipe. The water outlet of the water inlet pipe is provided above the primary filter area, and the drainage outlet is provided in the first drainage area.

3. The method for domesticating wild adult naked carp according to claim 2, characterized in that: The top of the primary filter area is provided with filter gauze, and filter cotton is provided below the filter gauze; the lower parts of the secondary filter area, the tertiary filter area and the quaternary filter area are all provided with biochemical cotton or biochemical felt, and the upper parts are all paved with coral sand.

4. The method for domesticating wild adult naked carp according to claim 1 or 2, characterized in that: The mesh size of the filter gauze and the separation gauze is 1-1.5 mm.

5. The method for domesticating wild adult naked carp according to claim 1, characterized in that: The water inlet pump of the filtering tank is located at the bottom of the cement pool, the water inlet pump of the temporary holding tank is 5-10 centimeters higher than the bottom of the cement pool, and dark opaque plastic pipes are placed in the cement pool for sharp naked carp to hide.

6. The method for domesticating wild adult naked carp according to claim 1, characterized in that: Keep the ammonia nitrogen concentration in the cement pool water no higher than 0.5mg / L, and the nitrite concentration no higher than 0.05mg / L.

7. The method for domesticating wild adult naked carp according to claim 1, characterized in that: The temporary holding tank is covered for feeding; the medicated bath refers to immersing the fish body in a solution containing 15‰ salt and 1‰ baking soda for 30 minutes.

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