Natural-imitated artificial host culture structure for olea europaea and clams and use method thereof

Abstract

The invention relates to a nature-imitating artificial host cultivation structure for olea europaea, which comprises a cultivation body structure, a juvenile mussel cultivation pool structure and a circulating water supply structure, the cultivation body structure comprises a cultivation barrel, a support underframe body structure, a separation net structure and a water flow control structure, and the cultivation barrel is divided into three layers; comprising a parent seed spitting layer, a host fish parasitic layer and a juvenile mussel collecting layer, and a water spraying structure is arranged at the upper end, corresponding to a water flow control structure, of the parent seed spitting layer to control mussel bodies to promote spitting of mussel seeds, namely medium larvae; the host fish parasitic layer is provided with swirling water flow corresponding to the water flow control structure so as to facilitate parasitism of interstitial larvae to the gill part of the host fish; the juvenile mussel collecting layer corresponds to the lower end of the water flow control structure, and sinks under the conditions of water flow and self gravity when the adults complete metamorphosis and develop into juvenile mussels. The device is simple in structure and convenient to use, natural'roe production 'of the razor clam parents is achieved in a manual water flow control mode, and the parasitic effect of medium larvae on host fishes is effectively improved.

Description

Technical Field

[0001] The invention relates to the field of clam breeding, in particular to an artificial host cultivation structure imitating natural olive razor clams. Background Art

[0002] Olive razor clams are unique freshwater economic shellfish in my country, commonly known as "clams" and "Huaihe abalone". They were once widely distributed in freshwater lakes and rivers in my country. Due to water pollution, habitat destruction and human fishing, their population resources are facing a severe decline. Existing resource surveys show that they are mainly distributed in Tianmen and Poyang Lake areas in the Yangtze River Basin and Funan and Huoqiu in the Huaihe River Basin.

[0003] At present, the artificial cultivation technology of olive clams has made certain progress. According to different cultivation methods, it can be divided into host fish cultivation method and in vitro cultivation method. The difference lies in whether the metamorphosis of the larvae is completed through host fish. At present, the in vitro cultivation method faces problems such as high cost and inability to mass produce. The cultivation method of olive clams is still mainly based on host fish cultivation. The host fish cultivation method mainly obtains the larvae through chemical or physical methods, and then uses flowing water nursery ponds, outdoor temporary holding ponds or indoor cement ponds to realize the parasitism of the larvae on the host fish (gill filaments), thereby completing the metamorphosis process.

[0004] The key factors affecting the host fish cultivation method mainly include the collection of gnaphalium larvae, the selection of host fish and the cultivation method. In order to improve the survival rate of artificially cultivated olive clams, we have invented a natural artificial cultivation process and usage method for olive clams. This method can realize the natural "seedling" of olive clam parents, effectively improve the parasitic effect of gnaphalium larvae on host fish, especially separate host fish from juvenile clams during the molting period, reduce the accidental ingestion of juvenile clams by host fish, and improve the survival rate of juvenile clams after molting. Summary of the invention

[0005] Aiming at many problems in the existing olive razor clam cultivation process, such as difficulty in collecting hooked shell larvae, unstable host fish fry rate, low survival rate of young clams, etc., the present invention proposes relevant technical solutions.

[0006] The technical solution adopted by the present invention to solve its technical problems is: an artificial host culture structure imitating natural olive razor clams, including a culture body structure, a young clam culture pool structure connected to the culture body structure, and a circulating water supply structure arranged between the culture body structure and the young clam culture pool structure, the culture body structure includes a culture bucket, a supporting bottom frame structure connected to the culture bucket, a partition structure arranged in the culture bucket, and a water flow control structure arranged outside the culture bucket, the young clam culture pool structure includes a culture pool, a culture pool water inlet pipe, a culture pool overflow trough and a culture pool water outlet pipe, the culture pool water inlet pipe is connected to the water flow control structure Then, the circulating water supply structure includes a lifting pump arranged outside the breeding pool and a circulating pipe connected to the lifting pump and connected to the water flow control structure. The breeding bucket is divided into three layers, including a parent seed-spitting layer, a host fish parasitic layer and a juvenile clam collecting layer. The parent seed-spitting layer corresponds to the upper end of the water flow control structure and a water spray structure is arranged to control the clam body to induce vomiting of clam seeds, i.e., hooked shell larvae; the host fish parasitic layer corresponds to the water flow control structure and a swirling water flow is arranged to facilitate the parasitism of the hooked shell larvae on the gills of the host fish; the juvenile clam collecting layer corresponds to the lower end of the water flow control structure. When the hooked shell larvae complete their metamorphosis and develop into juvenile clams, they sink to the bottom under the conditions of water flow and their own gravity.

[0007] The water flow control structure includes a host cultivation nozzle water pipe, a host cultivation water inlet pipe, a host cultivation water outlet pipe, a host cultivation water inlet control valve, a host cultivation water outlet control valve and a host cultivation water outlet overflow pipe. The circulation pipe is connected to the host cultivation water inlet pipe, the cultivation pool water inlet pipe is connected to the host cultivation water outlet pipe, and a flow controller is arranged outside the host cultivation nozzle water pipe.

[0008] The separation net structure comprises a clam seedling separation net plate arranged on the upper part of the cultivation barrel, a seedling leakage isolation net plate arranged in the middle part of the cultivation barrel, and a connecting support frame structure connecting the clam seedling separation net plate.

[0009] A method for using an artificial host cultivation structure for imitating natural olive razor clams, characterized in that: opening a lifting pump and a water flow control valve, closing a host cultivation water inlet control valve, injecting water into a cultivation bucket through a circulation pipe, opening a clam seedling separation plate after the water level is above a plastic mesh partition, placing host fish, wherein the host fish are silver carp and bighead carp; and placing sexually mature olive razor clams that have been exposed to sunlight for 10 to 20 minutes in a clam seedling separation plate after the water level is above the clam seedling separation plate. Adjust the water flow control valve, let the water in the culture barrel swirl, the water flow speed is about 0.2~0.3m / s, stimulate the mature individuals to expel the hookworm larvae, and allow the hookworm larvae and the host fish gills to fully parasitize for 2~3 minutes; adjust the water flow control valve, close the sprinkler water pipe, let it stand for 5 minutes, let the non-parasitized hookworm larvae settle, open the water flow control valve, use a 100-mesh net bag to filter out the non-parasitized hookworm larvae, and use them for parasitism in the next host fish de-frying facility. Close the host culture water inlet control valve, adjust the water flow control valve, open the host culture nozzle water pipe, make the water flow rate about 0.1m / s, regularly inspect the culture facilities, if there are fish deaths, open the clam fry separation plate, fish out; 4 to 5 days later, close the water flow control valve, fish out all host fish, 5 to 10 minutes later, open the host culture water inlet control valve, discharge the settled young clams into the culture pond, the water in the culture pond is mainly introduced into the ditch or pond water through the culture pond inlet pipe. If there is too much water, it will overflow to the overflow tank of the culture pond, and the excess water will be discharged through the culture pond outlet pipe.

[0010] The beneficial effects of the present invention are as follows: the device has a simple structure and is easy to use. It can realize the natural "seedling" of the olive clam parent by artificially controlling the water flow, effectively improving the parasitic effect of the hooked shell larvae on the host fish, especially separating the host fish from the young clams during the molting period, reducing the accidental ingestion of the young clams by the host fish, and improving the survival rate of the young clams after molting.

[0011] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention.

[0013] Figure 2 for Figure 1 Schematic diagram of the internal structure of the culture barrel.

[0014] In the figure: 1. Cultivation barrel, 2. Supporting bottom frame structure, 3. Cultivation pool, 4. Cultivation pool water inlet pipe, 5. Cultivation pool overflow trough, 6. Cultivation pool water outlet pipe, 7. Lifting pump, 8. Circulation pipe, 9. Parent seed spitting layer, 10. Host fish parasitic layer, 11. Juvenile mussel collection layer, 12. Host cultivation nozzle water pipe, 13. Host cultivation water inlet pipe, 14. Host cultivation water outlet pipe, 15. Host cultivation water inlet control valve, 16. Flow controller, 17. Mussel seedling separation screen, 18. Leakage seedling isolation screen, 19. Water flow control valve, 20. Connecting support frame structure, 21. Host fish cultivation overflow pipe DETAILED DESCRIPTION

[0015] The directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like in the application text are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0016] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] Embodiment 1, as Figure 1-2As shown in the figure, an artificial host cultivation structure for mimicking natural Solenaia oleivora includes a cultivation body structure, a juvenile mussel cultivation pond structure connected to the cultivation body structure, and a circulating water supply structure arranged between the cultivation body structure and the juvenile mussel cultivation pond structure. The cultivation body structure includes a cultivation barrel 1, a support chassis structure 2 connected to the cultivation barrel, a partition net structure arranged in the cultivation barrel, and a water flow control structure arranged outside the cultivation barrel. The juvenile mussel cultivation pond structure includes a cultivation pond 3, a cultivation pond inlet pipe 4, a cultivation pond overflow trough 5, and a cultivation pond outlet pipe 6. The cultivation pond inlet pipe 4 is connected to the water flow control structure. The circulating water supply structure includes a lift pump 7 arranged outside the cultivation pond 3 and a circulating pipe 8 connected to the lift pump and connected to the water flow control structure. The cultivation barrel is divided into three layers, including a spawning seedling layer 9 of parental mussels, a parasitic layer 10 of host fish, and a juvenile mussel collection layer 11. The spawning seedling layer of parental mussels corresponds to the upper end of the water flow control structure and is provided with a water spraying structure to control the parental mussels to vomit mussel seeds, i.e., glochidia. The parasitic layer of host fish corresponds to the water flow control structure and is provided with a swirling water flow to facilitate the parasitism of glochidia on the gill parts of host fish. The juvenile mussel collection layer corresponds to the lower end of the water flow control structure. When the glochidia complete metamorphosis into juvenile mussels, they sink to the bottom under the conditions of water flow and their own gravity.

[0018] The water flow control structure includes a host cultivation spray head water pipe 12, a host cultivation inlet pipe 13, a host cultivation outlet pipe 14, a host cultivation inlet water control valve 15, a host cultivation outlet water control valve 16, and a water flow control valve 19 arranged on the host cultivation inlet pipe 13. The circulating pipe is connected to the host cultivation inlet pipe, and the cultivation pond inlet pipe is connected to the host cultivation outlet pipe. A flow controller 16 is arranged outside the host cultivation spray head water pipe.

[0019] The partition net structure includes a mussel spawning seedling partition net plate 17 arranged at the upper part of the cultivation barrel, a seedling leakage isolation net plate 18 arranged in the middle of the cultivation barrel, and a connection support frame structure 20 connecting the mussel spawning seedling partition net plate 17.

[0020] Open the lifting pump 7 and the water flow control valve 19, close the host culture water inlet control valve 15, and fill the culture barrel with water through the circulation pipe 8. After the water level is above the plastic mesh partition 2, open the clam seedling partition 17, and place the host fish, wherein the host fish are silver carp and bighead carp. When the water level is above the clam seedling partition 17, place the sexually mature individuals of olive razor clams that have been exposed to the sun for 10 to 20 minutes on the clam seedling partition 17, adjust the control valve 1, let the water in the culture barrel swirl, and the water flow rate is about 0.2 to 0.3 m / s, stimulate the sexually mature individuals to expel the hook larvae, and allow the hook larvae to fully parasitize the gills of the host fish for 2 to 3 minutes. Adjust the water flow control valve 19, close the nozzle water pipe, let it stand for 5 minutes, let the unparasitized hookworm larvae settle, open the control valve 2, filter out the unparasitized hookworm larvae with a 100-mesh net bag, and use it for the parasitism of the next host fish de-frying facility. Close the host culture water inlet control valve 15, adjust the water flow control valve 191, open the host culture nozzle water pipe 12, make the water flow rate about 0.1m / s, regularly inspect the cultivation facilities, if there are fish deaths, open the clam seedling separation plate 17, and fish them out. After 4 to 5 days, close the water flow control valve 19, fish out all host fish, and after 5 to 10 minutes, open the host culture water inlet control valve 15, discharge the settled young clams into the cultivation pool 3, and the water from the cultivation pool 3 is mainly introduced into the ditch or pond water through the cultivation pool inlet pipe 4. If there is too much water, it will overflow to the overflow trough 5 of the cultivation pool, and the excess water will be discharged through the cultivation pool outlet pipe 6.

[0021] The device has a simple structure and is easy to use. It realizes the natural "seedling" of the olive clam parent by artificially controlling the water flow, effectively improving the parasitic effect of the hooked shell larvae on the host fish, especially separating the host fish from the juvenile clams during the molting period, reducing the host fish's accidental ingestion of the juvenile clams, and improving the survival rate of the juvenile clams after molting.

[0022] The above embodiments are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.

[0023] The parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art.

Claims

1. A natural-simulation artificial host culture structure for olive razor clams, characterized in that: The invention comprises a culture body structure, a juvenile clam culture pool structure connected to the culture body structure, and a circulating water supply structure arranged between the culture body structure and the juvenile clam culture pool structure, wherein the culture body structure comprises a culture bucket, a supporting bottom frame structure connected to the culture bucket, a partition structure arranged in the culture bucket, and a water flow control structure arranged outside the culture bucket, wherein the juvenile clam culture pool structure comprises a culture pool, a culture pool water inlet pipe, a culture pool overflow trough, and a culture pool water outlet pipe, wherein the culture pool water inlet pipe is connected to the water flow control structure, and the circulating water supply structure comprises a culture pool The outer lifting pump and the circulation pipe connected to the lifting pump and the water flow control structure, the breeding barrel is divided into three layers; including the parent seed-spitting layer, the host fish parasitic layer and the juvenile clam collecting layer, the parent seed-spitting layer corresponds to the upper end of the water flow control structure and is provided with a water spray structure to control the clam body to induce the vomiting of clam seeds, i.e., the hooked shell larvae; the host fish parasitic layer corresponds to the water flow control structure and is provided with a swirling water flow to facilitate the parasitism of the hooked shell larvae on the gills of the host fish; the juvenile clam collecting layer corresponds to the lower end of the water flow control structure, and when the hooked shell larvae complete the metamorphosis and develop into juvenile clams, they sink to the bottom under the conditions of water flow and their own gravity.

2. The artificial host cultivation structure imitating natural olive razor clams as claimed in claim 1, characterized in that: The water flow control structure includes a host cultivation nozzle water pipe, a host cultivation water inlet pipe, a host cultivation water outlet pipe, a host cultivation water inlet control valve, a host cultivation water outlet control valve and a host cultivation water outlet overflow pipe. The circulation pipe is connected to the host cultivation water inlet pipe, the cultivation pool water inlet pipe is connected to the host cultivation water outlet pipe and the overflow pipe, and a flow controller is arranged outside the host cultivation nozzle water pipe.

3. The artificial host cultivation structure imitating natural olive razor clams as claimed in claim 1, characterized in that: The separation net structure comprises a clam seedling separation net plate arranged on the upper part of the cultivation barrel, a seedling leakage isolation net plate arranged in the middle part of the cultivation barrel, and a connecting support frame structure connecting the clam seedling separation net plate.

4. The artificial host cultivation structure imitating natural olive razor clams as claimed in claim 1, characterized in that: The outer side of the cultivation barrel is also provided with a host fish cultivation overflow pipe, and one end of the host fish cultivation overflow pipe is connected with the host cultivation water outlet pipe.

5. A method for using a natural olive clam artificial host cultivation structure, characterized in that: The lifting pump and the water flow control valve are opened, the host culture water inlet control valve is closed, water is poured into the culture barrel through the circulation pipe, and after the water level is above the plastic net partition, the clam seedling partition is opened, and the host fish are placed, wherein the host fish are silver carp and bighead carp; when the water level is above the clam seedling partition, the sexually mature individuals of olive razor clams that have been exposed to the sun for 10 to 20 minutes are placed on the clam seedling partition, and the water flow control valve is adjusted to allow the water in the culture barrel to swirl, with a water flow speed of about 0.2 to 0.3 m / s, so as to stimulate the sexually mature individuals to expel the gnaphalids, and allow the gnaphalids and the host fish gills to fully parasitize for 2 to 3 minutes; the water flow control valve is adjusted, the sprinkler water pipe is closed, and after standing for 5 minutes, the non-parasitized gnaphalids are allowed to settle, the water flow control valve is opened, and the non-parasitized gnaphalids are filtered out with a 100-mesh net bag for parasitism in the next host fish de-seedling facility. Close the host culture water inlet control valve, adjust the water flow control valve, open the host culture nozzle water pipe, make the water flow rate about 0.1m / s, and the excess water flows into the young mussel culture pond through the overflow pipe. Regularly inspect the culture facilities. If there are fish deaths, open the clam fry separation plate and fish them out; after 4 to 5 days, close the water flow control valve, fish out all host fish, and after 5 to 10 minutes, open the host culture water inlet control valve to discharge the precipitated young mussels into the culture pond. The water in the culture pond is mainly introduced into the ditch or pond water through the culture pond inlet pipe. If there is too much water, it will overflow to the overflow tank of the culture pond and discharge the excess water through the culture pond outlet pipe.

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