Long-term artificial domestication device and method for frog-like crabs

Abstract

The application provides a long-term artificial domestication device and method for frog crabs. The domestication box main body is connected with a water supply pipe and a drain pipe, which can provide long-flowing water or circulating water conditions for the domestication box main body, and is beneficial to provide a clean water environment for frog crabs. The oxygen supply mechanism of the oxygen supply part is provided with a plurality of oxygen supply ports, each of which is connected with an oxygen supply pipe (the end of which is connected with a gas stone). The gas stones are distributed in the domestication box main body. In this way, oxygen can be provided in the water in the domestication box main body, and the dissolved oxygen in the water can be ensured to be normal. The temperature control part can control the water temperature in the domestication box main body to be 24-27 DEG C, and provide a suitable temperature for frog crabs. The bottom of the domestication box main body is provided with a sand laying area and a bait area. The sand laying area provides a sand lying condition for the domesticated frog crabs, and the bait area is used for providing a feeding place for the frog crabs. In this way, the frog crabs can hide in the sand and avoid fighting with each other as much as possible. In this way, the long-term artificial domestication of frog crabs can be provided as much as possible.

Description

Technical Field

[0001] This application relates to the field of deep-sea marine product domestication, and more specifically, to a long-term artificial domestication device and method for frog-like crabs. Background Technology

[0002] The frog crab (Ranina ranina), also known as the frog crab, wrench crab, ash crab, tiger crab, and imperial concubine crab, belongs to the class Crustacea, order Decapoda, and family Raninidae. It is an important economic food crab distributed in the tropical waters of the Indo-West Pacific. It is caught in Japan, South Korea, Australia, Hawaii, Southeast Asia, East Africa, and South Africa, and wild resources are also distributed in the East China Sea and South China Sea of ​​my country.

[0003] Frog-shaped crabs are widely distributed in the southern East my country Sea and South China Sea, and are caught in Fujian, Guangdong, Guangxi, and Hainan provinces. Their market price is close to or even exceeds that of sea lobsters, especially for live crabs, which command even higher prices. They are also a popular specialty dish in high-end restaurants. Frog-shaped crabs have delicious meat, a high meat yield, and most of their bodies are edible, making them a crab species with great potential for aquaculture.

[0004] However, the main sources of frog-shaped crabs are currently commercial fishing and frozen processing, making it difficult to supply live frog-shaped crabs. There are also some deep-sea shrimp and crab temporary holding systems, but they cannot be used for long-term domestication. Summary of the Invention

[0005] The purpose of this application is to provide a long-term artificial breeding device and method for frog-shaped crabs, so as to realize the long-term breeding of frog-shaped crabs and facilitate the long-term supply of fresh frog-shaped crabs to the market.

[0006] To achieve the above objectives, the embodiments of this application are implemented in the following manner:

[0007] In a first aspect, embodiments of this application provide a long-term artificial rearing device for frog-shaped crabs, comprising a rearing box body, an oxygen supply unit, a temperature control unit, and a light-shielding unit. The rearing box body is connected to a water supply pipe and a drain pipe, and the bottom of the rearing box body is provided with a sand-laying area and a feeding area. The sand-laying area is used to lay sand to provide sand lying conditions for the reared frog-shaped crabs, and the feeding area is used to put in food to provide a feeding place for the frog-shaped crabs. The oxygen supply unit has an oxygen supply mechanism with multiple oxygen supply ports, each oxygen supply port is connected to an oxygen supply pipe, and the end of each oxygen supply pipe is connected to an air stone. The air stones connected to the oxygen supply pipes are distributed inside the rearing box body. The temperature control unit is used to control the water temperature inside the rearing box body at 24-27°C. The light-shielding unit is used to shield the rearing box body from light.

[0008] In this embodiment, the main body of the rearing box is connected to a water supply pipe and a drainage pipe, providing a continuous flow or circulating water environment for the rearing box, which is beneficial for providing a clean aquatic environment for the frog-like crabs. The oxygen supply mechanism of the oxygen supply unit has multiple oxygen supply ports, each connected to an oxygen supply pipe, and each oxygen supply pipe has an air stone connected to its end. The air stones connected to the oxygen supply pipes are distributed inside the main body of the rearing box. This provides oxygen to the water inside the rearing box, ensuring normal dissolved oxygen levels. The temperature control unit can control the water temperature inside the rearing box at 24-27°C, providing a suitable temperature environment for the frog-like crabs. The light-shading unit can block light from entering the rearing box, reducing the light difference between the rearing box and the deep-sea environment when the light is strong. The bottom of the rearing box has a sand-laying area and a feeding area. The sand-laying area is used to lay sand, providing sandy conditions for the reared frog-like crabs to lie on, and the feeding area is used to provide food for the frog-like crabs to eat. This allows the frog crabs to burrow in the sand, minimizing competition among them. This method provides the best possible conditions for the long-term artificial breeding of frog crabs.

[0009] In conjunction with the first aspect, in the first possible implementation of the first aspect, the main body of the training box is a fiberglass barrel with a diameter of 1.5 to 2.5 meters and a height of 1.0 to 1.5 meters.

[0010] In conjunction with the first aspect, in a second possible implementation of the first aspect, the drain pipe is located at the center of the main body of the training box, and the opening of the drain pipe is 0.5 to 1.0 meters away from the bottom of the main body of the training box.

[0011] In this implementation, the drain pipe is located at the center of the training box body, and the opening of the drain pipe is 0.5 to 1.0 meters away from the bottom of the training box body, which can ensure the dynamic balance of water volume in the training box body.

[0012] In conjunction with the second possible implementation of the first aspect, in the third possible implementation of the first aspect, the feeding area is arranged around the drain pipe, the sand-laying area is arranged around the feeding area, and the sand-laying area is in contact with the inner wall of the taming box body.

[0013] In this implementation, the feeding area surrounds the drainage pipe, and the sand-covered area surrounds the feeding area, with the sand-covered area in contact with the inner wall of the rearing tank. This separates the feeding area and the sand-lying area for the frog-like crabs, facilitating the removal of uneaten food and ensuring the cleanliness of the water inside the rearing tank.

[0014] In conjunction with the third possible implementation of the first aspect, in the fourth possible implementation of the first aspect, the thickness of the sand layer in the sand-laying area is 12 to 20 centimeters.

[0015] In this implementation, the sand layer is 12 to 20 centimeters thick, which can provide a suitable sand-lying environment for the frog-like crab.

[0016] In conjunction with the fourth possible implementation of the first aspect, in the fifth possible implementation of the first aspect, the thickness of the sand layer gradually decreases from the inner wall of the main body of the taming box to the feeding area.

[0017] In this implementation, the sand layer gradually decreases in thickness from the inner wall of the rearing tank to the feeding area. This allows frog-like crabs of different sizes to choose different areas to lie in, thus avoiding aggressive behavior among them. Furthermore, because the sand layer thickness varies near and far from the feeding area (thicker further away), larger crabs stay further from the feeding area, while smaller crabs stay closer. After food is introduced, smaller crabs can more easily obtain food, minimizing competition for food from larger crabs and effectively reducing population loss due to individual crab conflicts.

[0018] In conjunction with the fifth possible implementation of the first aspect, in the sixth possible implementation of the first aspect, the height of the bottom center of the taming box body is higher than the height of the bottom edge, and it is inclined.

[0019] In this implementation, the height of the bottom center of the taming box is higher than the height of the bottom edge, and it is inclined, which is conducive to the gradual laying of sand layer thickness in the sand-laying area.

[0020] In conjunction with the first aspect, in the seventh possible implementation of the first aspect, the outlet of the water supply pipe forms a preset angle with the horizontal plane, and the preset angle is between 15 and 75 degrees.

[0021] In this implementation, the outlet of the water supply pipe forms a preset angle (between 15 and 75 degrees) with the horizontal plane, so that the water supply direction at the outlet of the water supply pipe forms a certain angle (preset angle, such as 30 degrees, 60 degrees, etc.) with the horizontal plane. While supplying water, the water body can be rotated to form a micro vortex flow, thereby simulating a flowing water environment, which is suitable for the long-term domestication of frog-shaped crabs.

[0022] In conjunction with the first aspect, in the eighth possible implementation of the first aspect, the temperature control unit includes a seawater chiller, a cooling water inlet pipe, and a cooling water outlet pipe. The cooling water inlet pipe is connected to the drain pipe and is used to obtain relatively high-temperature water from the drain pipe and input it into the seawater chiller. The seawater chiller is used to cool the relatively high-temperature water and output the cooled relatively low-temperature water to the cooling water outlet pipe. The cooling water outlet pipe extends into the main body of the training box and is used to input the relatively low-temperature water into the water inside the main body of the training box.

[0023] In this implementation, a seawater chiller, a chilled water inlet pipe, and a chilled water outlet pipe can be used to chill the relatively high-temperature water obtained from the drain pipe, and the chilled relatively low-temperature water can be output to the chilled water outlet pipe and then placed into the main body of the training box to achieve water temperature control inside the main body of the training box.

[0024] In conjunction with the first aspect, in the ninth possible implementation of the first aspect, the shading part is a shade net, and the shade net is disposed above the opening of the training box body to cover the outer surface of the training box body in order to shade the training box body.

[0025] In this implementation, a shade net is used to cover the outer surface of the training box body to block light and ensure a dark environment for the training box body.

[0026] Secondly, embodiments of this application provide a method for the long-term artificial rearing of frog-shaped crabs, comprising: selecting frog-shaped crabs with normal vitality and no injury, wherein the frog-shaped crabs are obtained by diving or trapping; transferring 25-30 frog-shaped crabs to the rearing box body of the long-term artificial rearing device for frog-shaped crabs as described in the first aspect or any possible implementation thereof, wherein the water temperature in the rearing box body is 24-27°C, the sand layer thickness in the sand-covered area is 12-20 cm, the dissolved oxygen in the water is 8-9 mg / L, the salinity of the water is 15‰-25‰, and the rearing box body maintains a continuous flow of water or circulating water; temporarily rearing the frog-shaped crabs for one day, and then feeding them high-nutrient feed. Observe the feeding behavior of the frog-like crabs. The high-nutrient feed mainly consists of sandworms and oysters. If the frog-like crabs do not eat, stop feeding for one day and continue to observe their feeding behavior until they start eating normally. After they start eating normally, feed them twice a day and gradually transition to feeding them normal feed. During the temporary holding period, if the main body of the rearing tank maintains circulating water, monitor the water quality in real time and replace the water with fresh water as needed. The normal feed mainly consists of oysters and low-value shrimp, crab, and shellfish meat. After the temporary holding period, change the sand layer and disinfect the main body of the rearing tank. Feed them normal feed 1-2 times a day, record the amount of food consumed each time and remove any uneaten food in time. Monitor the water quality once a week and change the sand layer and disinfect the main body of the rearing tank every two weeks.

[0027] In this embodiment, the long-term artificial rearing device for frog-like crabs effectively ensures suitable rearing conditions (water temperature of 24–27°C, sand layer thickness of 12–20 cm in the sand-covered area, dissolved oxygen of 8–9 mg / L, salinity of 15‰–25‰, and continuous or circulating water), thus facilitating the survival rate of the frog-like crabs in long-term artificial rearing. Temporary rearing of the frog-like crabs, closely observing their feeding during this period, monitoring water quality in real time and promptly replacing the water, and gradually transitioning their diet from high-nutrient feed (mainly sandworms and oysters) to normal feed (mainly oysters and low-value shrimp, crab, and shellfish meat) effectively reduces rearing costs. Periodically changing and washing the sand layer, disinfecting the rearing box, and promptly removing uneaten feed after feeding effectively maintains a clean rearing environment for the frog-like crabs. The sand layer provides a hiding place for frog crabs. In addition, each taming box should contain 25 to 30 frog crabs to avoid overcrowding and mutual attacks.

[0028] In conjunction with the second aspect, in the first possible implementation of the second aspect, the temporary holding period is 20 to 40 days.

[0029] In this method, the 20-40 day temporary rearing period allows the frog-like crab to adapt well to the domestication environment, which is beneficial to improving the survival rate of the frog-like crab during the domestication period.

[0030] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of a long-term artificial breeding device for a frog-like crab, provided in an embodiment of this application.

[0033] Figure 2 This is a schematic diagram of the main body of the taming box provided in an embodiment of this application, viewed from above.

[0034] Icons: 100-Taming device; 110-Taming box body; 120-Oxygen supply unit; 121-Oxygen supply pipe; 122-Air stone; 130-Temperature control unit; 131-Seawater chiller; 132-Refrigeration water inlet pipe; 133-Refrigeration water outlet pipe; 140-Shading unit; 151-Water supply pipe; 152-Drainage pipe. Detailed Implementation

[0035] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0036] Please see Figure 1 , Figure 1 This is a schematic diagram of a long-term artificial breeding device 100 for a frog-like crab, provided in an embodiment of this application.

[0037] In this embodiment, the long-term artificial breeding device 100 for frog-like crabs may include a breeding box body 110, an oxygen supply unit 120, a temperature control unit 130, and a light-shielding unit 140.

[0038] For example, the main body 110 of the taming box can be connected to a water supply pipe 151 and a drain pipe 152 (to supply water and drain water to the main body 110 of the taming box). The bottom of the main body 110 of the taming box is provided with a sand-laying area and a feeding area. The sand-laying area is used to lay sand to provide sand lying conditions for the tamed frog-like crabs, and the feeding area is used to put food in to provide a feeding place for the frog-like crabs.

[0039] For example, the oxygen supply mechanism of the oxygen supply unit 120 is provided with multiple oxygen supply ports, each oxygen supply port is connected to an oxygen supply pipe 121, and each end of the oxygen supply pipe 121 is connected to an air stone 122. The air stones 122 connected to the oxygen supply pipe 121 are distributed inside the training box body 110.

[0040] For example, the temperature control unit 130 can be used to control the water temperature inside the acclimatization box body 110 at 24 to 27°C.

[0041] For example, the light-shading part 140 can be used to shade the taming box body 110, providing a dark taming environment.

[0042] The main body 110 of the rearing tank is connected to a water supply pipe 151 and a drain pipe 152, providing a continuous flow or circulating water environment for the rearing tank, which is beneficial for providing a clean aquatic environment for the frog-like crabs. The oxygen supply unit 120 has multiple oxygen supply ports, each connected to an oxygen supply pipe 121, and each oxygen supply pipe 121 is connected to an air stone 122 at its end. The air stones 122 connected to the oxygen supply pipes 121 are distributed inside the main body 110 of the rearing tank. This provides oxygen to the water inside the rearing tank 110, ensuring normal dissolved oxygen levels. The temperature control unit 130 can control the water temperature inside the rearing tank 110 at 24-27°C, providing a suitable temperature environment for the frog-like crabs. The light-shading unit 140 can shade the main body 110 of the rearing tank, reducing the light inside the rearing tank 110 when the light is strong, and minimizing the light difference with the deep-sea environment. The bottom of the main body 110 of the breeding box is equipped with a sand-laying area and a feeding area. The sand-laying area is used to provide sand for the domesticated frog-like crabs to lie on, while the feeding area is used to provide food for the frog-like crabs to eat. This allows the frog-like crabs to lie in the sand, minimizing competition among them. This method can provide conditions for the long-term artificial breeding of frog-like crabs as much as possible.

[0043] In this embodiment, the main body 110 of the training box can be a fiberglass barrel with a diameter of 1.5 to 2.5 meters and a height of 1.0 to 1.5 meters. For example, a blue fiberglass barrel with a diameter of 2 meters and a height of 1.2 meters.

[0044] In this embodiment, the drain pipe 152 can be set at the center of the training box body 110, and the opening of the drain pipe 152 is 0.5 to 1.0 meters (e.g., 1.0 meter) away from the bottom of the training box body 110, so as to ensure that the water volume in the training box body 110 is kept in dynamic balance.

[0045] Please see Figure 2 , Figure 2 This is a top view of the taming box body 110 provided in this embodiment. In this embodiment, the feeding area can be arranged around the drain pipe 152, and the sand-covering area can be arranged around the feeding area, with the sand-covering area in contact with the inner wall of the taming box body 110. For example, the feeding area can be a rectangular area or a circular area (i.e., the feeding area is ring-shaped, and the sand-covering area is a larger ring-shaped area), which is not limited here. This separates the feeding area and the sand-covering area for taming frog-like crabs, which is beneficial for removing uneaten food and ensuring the cleanliness of the water in the taming box body 110.

[0046] In this embodiment, the thickness of the sand layer in the sand-covered area can be 12 to 20 centimeters (e.g., 12 centimeters, 15 centimeters, 20 centimeters, etc.), which can provide a suitable sand-lying environment for the frog-like crab.

[0047] In this embodiment, the sand layer thickness gradually decreases from the inner wall of the rearing tank body 110 to the feeding area. This allows frog-like crabs of different sizes to choose different areas to lie in the sand, thus avoiding aggressive behavior among them. Furthermore, because the sand layer thickness differs between the feeding and feeding areas (thicker further away), larger individuals are further from the feeding area, while smaller individuals are closer. After food is provided, smaller frog-like crabs can more easily obtain food, minimizing competition for food between them and larger individuals, effectively reducing population loss due to individual conflict.

[0048] In this embodiment, the height of the bottom center of the taming box body 110 is higher than the height of the bottom edge, and it is inclined. This facilitates the gradual laying of sand layer thickness in the sand-laying area.

[0049] In this embodiment, the outlet of the water supply pipe 151 forms a preset angle with the horizontal plane, which is between 15 and 75 degrees (e.g., 15 degrees, 30 degrees, 45 degrees, 60 degrees, 75 degrees, etc., which are not limited here). This makes the water supply direction at the outlet of the water supply pipe 151 form a certain angle (preset angle, such as 30 degrees, 60 degrees, etc.) with the horizontal plane, so that the water can be rotated at the same time as water supply, forming a micro-vortex flow, thereby simulating a flowing water environment, which is suitable for the long-term domestication of frog-like crabs.

[0050] In this embodiment, the temperature control unit 130 may include a seawater chiller 131, a chilled water inlet pipe 132, and a chilled water outlet pipe 133.

[0051] For example, the cooling water inlet pipe 132 can be connected to the drain pipe 152 for obtaining relatively high temperature water from the drain pipe 152 and inputting it into the seawater chiller 131.

[0052] For example, the seawater chiller 131 can be used to cool relatively high temperature water (input into the seawater chiller 131 via the cooling water inlet pipe 132) and output the cooled relatively low temperature water to the cooling water outlet pipe 133.

[0053] For example, the cooling water outlet pipe 133 can extend into the training box body 110 to introduce relatively low temperature water into the water inside the training box body 110.

[0054] This allows the use of seawater chiller 131, chilled water inlet pipe 132, and chilled water outlet pipe 133 to chill the relatively high-temperature water obtained from drain pipe 152, and then output the chilled relatively low-temperature water to chilled water outlet pipe 133, which is then placed into the main body 110 of the training box, thereby achieving water temperature control within the main body 110 of the training box.

[0055] In this embodiment, the light-shielding part 140 can be a shade net, and the shade net is set above the opening of the training box body 110 to cover the outer surface of the training box body 110 in order to block the light from the training box body 110, thus ensuring the dark environment of the training box body 110.

[0056] The above is an introduction to the long-term artificial domestication device 100 for frog-shaped crabs provided in the embodiments of this application. The following will introduce the domestication method for long-term artificial domestication of frog-shaped crabs using the long-term artificial domestication device 100 for frog-shaped crabs.

[0057] In this embodiment, the long-term artificial domestication method for frog-like crabs may include:

[0058] Step S10: Select frog-shaped crabs that are alive and undamaged (e.g., without missing legs or other damage), wherein the frog-shaped crabs are obtained by diving or trapping.

[0059] Step S20: Transfer 25-30 frog-like crabs to the main body of the long-term artificial breeding device for frog-like crabs. The water temperature in the main body of the breeding box is 24-27℃, the sand layer thickness in the sand-covered area is 12-20 cm, the dissolved oxygen in the water is 8-9 mg / L, the salinity of the water is 15‰-25‰, and the main body of the breeding box is kept with a constant flow of water or circulating water.

[0060] Step S30: Temporarily raise the frog-shaped crabs for one day, then feed them high-nutrient bait and observe their feeding behavior. The high-nutrient bait mainly consists of sandworms and oysters.

[0061] Step S40: If the frog-shaped crab does not eat, stop feeding for one day and continue to observe its feeding situation until it starts eating normally. After it starts eating normally, feed it twice a day and gradually transition to feeding it normal food. During the temporary rearing period, if the main body of the rearing tank maintains circulating water, monitor the water quality in real time and replace the water with fresh water in a timely manner. The normal food consists mainly of oysters and low-value shrimp, crab and shellfish meat.

[0062] Step S50: After the temporary rearing period, change and wash the sand layer and disinfect the main body of the rearing box. Feed the animals with normal food 1-2 times a day, record the amount of food consumed each time and remove any uneaten food in time. Conduct water quality monitoring once a week, and change and wash the sand layer and disinfect the main body of the rearing box every two weeks.

[0063] Through the above steps, the long-term artificial rearing device 100 for frog-shaped crabs can effectively ensure suitable rearing conditions (water temperature of 24-27℃, sand layer thickness of 12-20 cm in the sand-covered area, dissolved oxygen of 8-9 mg / L, salinity of 15‰-25‰, and continuous flow or circulation of water), thus contributing to the survival rate of the frog-shaped crabs in long-term artificial rearing. Temporary rearing of the frog-shaped crabs, closely observing their feeding behavior, monitoring water quality in real time, and promptly changing the water, while gradually transitioning their diet from high-nutrient feed (mainly sandworms and oysters) to normal feed (mainly oysters and low-value shrimp, crab, and shellfish meat), can effectively reduce rearing costs. Periodically changing and washing the sand layer, disinfecting the rearing box 110, and promptly removing uneaten feed after feeding can effectively maintain a clean rearing environment for the frog-shaped crabs. The sand layer provides a hiding place for frog crabs. In addition, each taming box should contain 25 to 30 frog crabs to avoid overcrowding and mutual attacks.

[0064] In addition, a shade net (i.e., a shading section) can be used on the top of the taming box to reduce the light inside the taming box and mimic the ecological environment.

[0065] In this embodiment, the temporary rearing period can be 20-40 days (30 days is preferred, but can be dynamically adjusted according to the actual situation; if the frog-shaped crab adapts well, the temporary rearing period can be shorter; if the frog-shaped crab adapts poorly, the temporary rearing period can be longer). This allows the frog-shaped crab to adapt well to the domestication environment, which is beneficial to improving the survival rate of the frog-shaped crab during the domestication period.

[0066] This section uses an example of the long-term artificial domestication of a frog-like crab to illustrate the effectiveness of the long-term artificial domestication device 100 of this scheme and the method of long-term artificial domestication of frog-like crabs using the long-term artificial domestication device 100:

[0067] In April 2020, the inventor collected 341 frog-like crabs (active and undamaged, all caught by diving or trapping) from Wanning, Hainan. During transport, 328 were lost (the water depth during transport was 30cm, with cold water cooling and oxygenation, and the water temperature was around 23 degrees Celsius; each container transported 50-60 frog-like crabs weighing 100-150g each, with a transport time of 2 hours and a loss of 2-3 crabs per container). 304 survived the first week of temporary rearing, 285 survived after one month, 268 survived after three months of domestication, 237 survived after six months, and 202 survived after one year. The overall survival rate after one year of domestication was 59.23%.

[0068] Therefore, by utilizing the long-term artificial domestication device 100 for frog-shaped crabs and employing long-term artificial domestication methods, long-term domestication and farming of frog-shaped crabs can be achieved. This allows for a sustained and continuous supply of live frog-shaped crabs to meet market demand, while also providing a sufficient scale of domesticated crabs for artificial breeding and new variety development. Furthermore, it can provide guidance for the temporary holding or long-term domestication and farming of other types of deep-sea shrimp and crabs.

[0069] In summary, this application provides a long-term artificial breeding device and method for frog-like crabs. The breeding box body 110 is connected to a water supply pipe 151 and a drain pipe 152, providing a continuous flow or circulating water environment for the breeding box body 110, which is beneficial for providing a clean water environment for the frog-like crabs. The oxygen supply unit 120 has multiple oxygen supply ports, each connected to an oxygen supply pipe 121, and each end of the oxygen supply pipe 121 is connected to an air stone 122. The air stones 122 connected to the oxygen supply pipes 121 are distributed inside the breeding box body 110. This provides oxygen to the water in the breeding box body 110, ensuring normal dissolved oxygen levels. The temperature control unit 130 can control the water temperature in the breeding box body 110 at 24-27°C, providing a suitable temperature environment for the frog-like crabs. The light-shading section 140 can block light from the main body 110 of the rearing box, reducing the light inside the box when the light is strong and minimizing the light difference with the deep-sea environment. The bottom of the main body 110 of the rearing box has a sand-laying area and a feeding area. The sand-laying area provides sand for the reared frog-like crabs to lie on, while the feeding area provides food for them to eat. This allows the frog-like crabs to lie in the sand, minimizing competition among them. This method provides conditions for the long-term artificial rearing of frog-like crabs.

[0070] In this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations.

[0071] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A long-term artificial breeding device for frog-like crabs, characterized in that, Including the main body of the taming box, oxygen supply unit, temperature control unit, and light-blocking unit. The main body of the breeding box is connected to a water supply pipe and a drainage pipe. The bottom of the main body of the breeding box is provided with a sand-laying area and a feeding area. The sand-laying area is used to lay sand to provide sand lying conditions for the domesticated frog-shaped crabs. The feeding area is used to put in food to provide a feeding place for the frog-shaped crabs. The feeding area is arranged around the drainage pipe, and the sand-laying area is arranged around the feeding area. The sand-laying area is in contact with the inner wall of the main body of the breeding box. The oxygen supply mechanism of the oxygen supply unit is provided with multiple oxygen supply ports, each oxygen supply port is connected to an oxygen supply pipe, and each oxygen supply pipe is connected to an air stone at the end. The air stones connected to the oxygen supply pipes are distributed inside the main body of the training box. The temperature control unit is used to control the water temperature inside the acclimatization box at 24~27℃; The light-shielding part is used to shield the main body of the taming box from light; The sand layer gradually decreases in thickness from the inner wall of the rearing box to the feeding area, allowing frog-like crabs of different sizes to choose different areas to lie in, thus avoiding aggressive behavior among them. Because the sand layer thickness varies depending on its distance from the feeding area (the further away from the feeding area, the thicker the sand), larger individuals are further from the feeding area, while smaller individuals are closer. After food is provided, smaller frog-like crabs can more easily obtain food, preventing them from competing with larger ones for food and reducing population loss due to individual conflicts.

2. The long-term artificial breeding device for frog-like crabs according to claim 1, characterized in that, The thickness of the sand layer in the sand-covered area is 12-20 cm.

3. The long-term artificial breeding device for frog-like crabs according to claim 1, characterized in that, The bottom center of the taming box is higher than the bottom edge and is tilted.

4. The long-term artificial breeding device for frog-like crabs according to claim 1, characterized in that, The outlet of the water supply pipe forms a preset angle with the horizontal plane, and the preset angle is between 15 and 75 degrees.

5. The long-term artificial breeding device for frog-like crabs according to claim 1, characterized in that, The temperature control unit includes a seawater chiller, a chilled water inlet pipe, and a chilled water outlet pipe. The cooling water inlet pipe is connected to the drain pipe, and is used to obtain relatively high temperature water from the drain pipe and input it into the seawater chiller; The seawater chiller is used to cool the relatively high temperature water and output the cooled relatively low temperature water to the cooling water outlet pipe. The cooling water outlet pipe extends into the main body of the training box to introduce the relatively low temperature water into the water inside the main body of the training box.

6. The long-term artificial breeding device for frog-like crabs according to claim 1, characterized in that, The light-shading part is a shade net, and the shade net is set above the opening of the main body of the training box to cover the outer surface of the main body of the training box in order to shade the main body of the training box.

7. A method for long-term artificial domestication of frog-like crabs, characterized in that, include: Select healthy, undamaged frog-shaped crabs, which are obtained by diving or trapping. 25 to 30 frog-like crabs are transferred to the main body of the long-term artificial breeding device for frog-like crabs according to any one of claims 1 to 6, wherein the water temperature in the main body of the breeding box is 24 to 27°C, the sand layer thickness in the sand-covered area is 12 to 20 cm, the dissolved oxygen in the water is 8 to 9 mg / L, the salinity of the water is 15‰ to 25‰, and the main body of the breeding box is kept with a constant flow of water or circulating water. The frog-shaped crabs were temporarily kept in captivity for one day and then fed with high-nutrient feed. The feeding behavior of the frog-shaped crabs was observed. The high-nutrient feed mainly consisted of sandworms and oysters. If the frog-shaped crab does not eat, stop feeding for one day and continue to observe its feeding situation until it starts eating normally. After it starts eating normally, feed it twice a day and gradually transition to feeding it normal food. During the temporary rearing period, if the main body of the rearing tank is kept in circulating water, monitor the water quality in real time and replace the water with fresh water in a timely manner. The normal food consists mainly of oysters and low-value shrimp, crab and shellfish meat. After the temporary rearing period, the sand layer should be changed and the main body of the rearing box should be disinfected. Normal food should be fed 1-2 times a day, and the amount of food consumed each time should be recorded and any uneaten food should be removed in time. Water quality should be monitored once a week, and the sand layer should be changed and the main body of the rearing box should be disinfected every two weeks.

8. The long-term artificial domestication method for frog-like crabs according to claim 7, characterized in that, The temporary holding period is 20 to 40 days.

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