Pseudosciaena crocea fry enhancement and release wild training device and method

Abstract

The invention discloses a large yellow croaker fry enhancement and release wild training device and method, and relates to the technical field of marine biological resource conservation, and the large yellow croaker fry enhancement and release wild training device comprises a water tank for containing water, and a plurality of fish reefs are placed in the water tank; the light source is arranged above the water tank; the plurality of wave making pumps are uniformly arranged on one side of the inner wall of the water tank; the throwing structure is used for throwing natural enemy pheromones into the water tank; the camera is arranged on the inner wall of the water tank; the controller is electrically connected with the camera, the light source and the wave making pumps, the camera is used for collecting behavior characteristic information of the large yellow croaker in wild training and sending the behavior characteristic information to the controller, and the fish behavior analysis system comprehensively analyzes swimming and fish reef use conditions of the large yellow croaker fry in the water tank and analyzes and judges the wild training effect of the large yellow croaker fry. The method has the advantages that the capability of the larimichthys crocea fry adapting to the marine natural environment is enhanced, and the survival rate of the released fry is increased.

Description

Technical Field

[0001] The invention relates to the technical field of marine biological resource conservation, and in particular to a large yellow croaker fry proliferation, release and wilding training device and method. Background Art

[0002] Yellow croaker, commonly known as yellow croaker and cucumber fish, belongs to the phylum Chordata, class Osteichthyes, order Perciformes, and family Sciaenidae. It is one of my country's traditional "four major marine products" and the largest marine fish farmed in my country. Although artificial propagation and release have become an important means to restore natural fish resources and expand wild populations, since the successful artificial breeding of yellow croaker, especially in the past decade or so, the release of propagation to supplement wild resources has achieved certain results, but the release effect has not yet reached expectations, and the amount of wild resources is far from recovery.

[0003] The fish seedlings used for reproduction and release on the market are all obtained through artificial commercial breeding. Since the artificially bred released seedlings are relatively lacking in swimming ability, feeding ability and anti-predator ability, they are unable to adapt to the natural environment of seawater after release. For example, they are unable to adapt to ocean turbulence, lack predation ability and cannot effectively avoid predators, which leads to a low survival rate in the wild environment. This is a common problem currently faced in fish reproduction and release.

[0004] At present, the international experience of the reproduction and release of species such as Murray cod and Arkansas darter has proved that targeted artificial wild training of fish seedlings before release can effectively improve their adaptability and survival rate after entering natural water bodies. Therefore, it is necessary to develop a cost-saving, efficient and practical method of wild training of seedlings before release, which has practical value for improving the survival rate of important economic fish reproduction and release in my country and the sustainable development of fishery resources. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a large yellow croaker fry proliferation and release wild training device and method, which enhances the ability of large yellow croaker fry to adapt to the natural marine environment and improves the survival rate of released fry.

[0006] The present invention provides a large yellow croaker fry proliferation and release wild training device, comprising: A water tank, used for containing water, wherein a plurality of fish reefs are placed in the water tank; A light source is arranged above the water tank and is used to simulate the photoperiodic changes under natural conditions; A plurality of wave-making pumps are evenly arranged on one side of the inner wall of the water tank, and are used to fluctuate the water flow in the water tank; A delivery structure, used for delivering natural enemy pheromones into the water tank; A camera, arranged on the inner wall of the water tank; The controller is electrically connected to the camera, the light source, and the plurality of wave-making pumps. The camera is used to collect behavioral characteristic information of large yellow croaker during rewilding training and send the behavioral characteristic information to the controller. The controller is provided with a storage unit and an analysis unit. The storage unit is used to store the behavioral characteristic information of large yellow croaker during rewilding training collected by the camera and the behavioral characteristic information of large yellow croaker in the marine ecosystem. The analysis unit compares the behavioral characteristic information of large yellow croaker during rewilding training collected and stored in the storage unit with the behavioral characteristic information of large yellow croaker in the marine ecosystem. The fish behavior analysis system is used to comprehensively analyze the swimming and reef usage of large yellow croaker seedlings in the water tank, and the rewilding training effect is analyzed and determined.

[0007] Preferably, the delivery structure includes: A pipe body, one end of which is located in the water tank, and the pipe body is close to the wave-making pump; A storage tank is arranged on the side wall of the water tank, and natural enemy pheromones are stored in the storage tank. A water pump is provided in the storage tank, and the water pump is electrically connected to the controller. The output end of the water pump is connected to the other end of the tube body, and the water pump is used to release the natural enemy pheromones in the storage tank into the water tank through the tube body.

[0008] Preferably, the natural enemy pheromone is a dilution of sea bass, sea eel and grouper muscle grinds.

[0009] Preferably, it also includes: The shell is used for containing feed, and a plurality of through holes are provided on the shell. When in use, the shell is placed in the water tank.

[0010] Preferably, the bottom of the water tank is connected with a water inlet pipe and a sewage pipe, the water inlet pipe is used for taking in water, and the sewage pipe is used for discharging water and excrement and food residues of the large yellow croaker fry.

[0011] A method for training large yellow croaker fry for proliferation and release into the wild is carried out using a large yellow croaker fry for proliferation and release into the wild training device, comprising the following steps: Putting the large yellow croaker fry to be trained into the water tank; The controller controls the light intensity and light cycle of the light source to simulate the light environment of the marine ecosystem; The controller controls the plurality of wave-making pumps to work, simulating the water flow environment of the marine ecosystem and training the swimming ability of large yellow croaker fry; Feeding feed to train the large yellow croaker fry's ability to hunt; The controller controls the water pump to release the natural enemy pheromone in the storage tank into the water tank through the pipe body, so as to train the large yellow croaker fry to avoid being preyed upon; The camera collects the behavioral characteristic information of the large yellow croaker fry in the wild training and sends the behavioral characteristic information to the controller; The analysis unit in the controller compares the behavioral characteristic information of the large yellow croaker in the wild training and the behavioral characteristic information of the large yellow croaker in the marine ecosystem stored in the storage unit, and comprehensively analyzes the swimming and reef use of the large yellow croaker seedlings in the tank through the fish behavior analysis system to analyze and determine the effect of the wild training; When the training effect after analysis meets the standards, the yellow croaker fry will be released into the wild. When the training effect after analysis does not meet the standards, the yellow croaker fry will continue to be trained.

[0012] Preferably, training the swimming ability of large yellow croaker fry comprises the following steps: The controller controls the flow rate of the plurality of wave-making pumps to be controlled at 0.2 m / s-0.25 m / s to form a gentle water flow, and after 24 h-48 h, observes the adaptation of the large yellow croaker fry; When the difference between the swimming speed of the large yellow croaker fry in the water tank and the flow rate of the wave-making pump is within ±0.02m / s, the flow rates of the plurality of wave-making pumps are gradually increased, and the flow rates of the plurality of wave-making pumps are adjusted every 2h, and the flow rate difference adjusted each time is 0.02m / s-0.05m / s, and the flow rate difference adjusted each time is equal. When the flow rate of the wave-making pump is adjusted to 0.45m / s, it is recorded as one round of uniform speed training; When the difference between the swimming speed of the large yellow croaker fry in the water tank and the flow rate of the wave-making pump is within ±0.02m / s, the flow rates of the plurality of wave-making pumps are gradually increased, and the flow rates of the plurality of wave-making pumps are adjusted every 2h, and the flow rate difference adjusted each time is 0.02m / s-0.05m / s, and the flow rate difference adjusted each time is not equal. When the flow rate of the wave-making pump is adjusted to 0.45m / s, it is recorded as one round of speed change training; During the 4-6 day domestication process, one round of uniform speed training is conducted one day and one round of variable speed training is conducted every other day, alternating to complete the swimming ability training of large yellow croaker fry.

[0013] Preferably, feeding feed to train the ability of large yellow croaker fry to prey includes the following steps: During the uniform speed training or variable speed training, a small amount of Artemia is simultaneously placed into the shell, and the shell is placed into the water tank, and a certain amount of granular feed is supplemented after an interval of 1 hour according to the feeding situation; Repeat the above feeding method for 3-5 days, and gradually increase the amount of Artemia and reduce the amount of pellet feed. On the 6th to 10th day, Artemia completely replaced the pelleted feed; After the 10th day, the feeding of Artemia is gradually reduced, and shrimp fry is put into the water tank at the same time, and the amount of shrimp fry is increased day by day until the shrimp fry completely replaces the Artemia.

[0014] Preferably, the ability of training large yellow croaker fry to avoid being preyed upon comprises the following steps: The controller controls the flow rate of the plurality of wave-making pumps to be controlled at 0.2m / s-0.25m / s to form a gentle water flow, and observes the adaptation of the large yellow croaker fry; When the difference between the swimming speed of the large yellow croaker fry in the water tank and the flow rate of the wave-making pump is within ±0.02 m / s, the controller controls the water pump to work, and a certain amount of natural enemy pheromone in the storage tank is released into the water tank through the tube body, so that the large yellow croaker fry feel the stress of being preyed on and escape quickly in a burst swimming manner; The camera collects behavioral characteristic information of large yellow croaker fry within 10 seconds and sends it to the controller, and the controller calculates the burst swimming speed of the fry according to the swimming distance of the fry within 10 seconds; When the yellow croaker fry produce a rapid escape response and recover to a constant speed after a period of time, it is recorded as one round of escape training. During the domestication period, six rounds of escape training are carried out every day. When the swimming distance of the large yellow croaker fry within 1 minute under predation stress is stabilized at 25-30m for three consecutive times, the training of its ability to avoid predation is completed.

[0015] Preferably, when the flow rate of the wave-making pump is 0.45 m / s, the large yellow croaker fry to be trained swim against the current for 10 minutes, and the swimming speed changes by no more than ±0.02 m / s. At the same time, within 6-10 minutes of adding the natural enemy pheromone, when 45%-60% of the large yellow croaker fry's activity area is within the fish reef, the training effect meets the standard.

[0016] Compared with the prior art, the present invention discloses a large yellow croaker fry proliferation and release wild training device and method, which has the following beneficial effects: The present invention is used to tame the swimming, feeding and predation-avoidance abilities of released large yellow croaker seedlings, enhance the ability of artificially bred and released seedlings to adapt to the natural marine environment, improve the survival rate of released seedlings, and further enhance the proliferation effect of large yellow croaker after release. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the delivery structure of the present invention.

[0019] The meaning of each number in the figure: 1-controller, 2-light source, 3-water tank, 4-delivery structure, 41-pipe body, 42-water pump, 43-storage tank, 5-camera, 6-wave pump, 7-fish reef, 8-water inlet pipe, 9-drain pipe, 10-shell. DETAILED DESCRIPTION

[0020] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0021] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it 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 an indirect connection 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 this application can be understood according to specific circumstances.

[0023] In addition, in the description of the present invention, "plurality" means two or more than two. The terms "first" and "second" are used for descriptive purposes only and should not be understood to imply or suggest relative importance or implicitly indicate the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0024] Example 1 The embodiment of the present invention provides a large yellow croaker fry reproduction and release wild training device such as Figure 1As shown, it includes: a water tank 3, a fish reef 7, a light source 2, a wave pump 6, a delivery structure 4, a camera 5, and a controller 1. The water tank 3 is used to contain water. The water tank 3 is used as a container for cultivating and domesticating large yellow croaker fry. The water tank 3 is a rectangular or oval aquaculture cement pool or a fiberglass reinforced plastic tank with a volume of 15m 3As described above, the water tank 3 is filled with a water source suitable for the life of large yellow croaker fry, wherein the inner wall of the water tank 3 is changed in color by pollution-free ecological paint, reducing the use of oxygen supply equipment such as air stones and air pipes, making the overall domestication environment closer to the real environment of the marine ecosystem, accelerating the adaptation speed of large yellow croaker fry and reducing stress, and placing a plurality of fish reefs 7 in the water tank 3. The fish reefs 7 are artificial fish reefs with many holes on them for the large yellow croaker fry to hide. The fish reefs 7 are heavy and can sink to the bottom of the water tank 3. According to the area of ​​the water tank 3, 10-15 fish reefs 7 are set, and the fish reefs 7 can be glued and fixed to the bottom of the water tank 3. The fish reefs 7 include various shapes such as squares and triangles, and the fish reefs 7 are hollow inside and circular, There are various irregular holes such as squares and triangles (the size is 3 times the length of the fish body), the height of the fish reef 7 is 1 / 3-1 / 2 of the water depth in the water tank 3, simulating reefs or shelters in the marine habitat; the light source 2 is arranged above the water tank 3 to simulate the changes in the light cycle under natural conditions. The light source is an LED lamp, which uses a white light source and a yellow light source that can simulate natural light. The light intensity is adjustable. 4-6 LED lights can be set according to the size of the water tank 3. The light cycle is set to 12 hours (light) and 12 hours (darkness) to simulate the natural light environment and cycle; multiple wave pumps 6 are evenly arranged on one side of the inner wall of the water tank 3 to stir the water flow in the water tank 3. The wave pump 6 is a fish for fish farming. The commonly used pump body in the cylinder can adjust the flow rate of the water flow to simulate the flow rate of the water flow in the natural environment. Multiple wave pumps 6 are arranged on one side of the water tank 3 to avoid water flow collision and simulate the natural water flow direction. Multiple wave pumps 6 can be arranged at different heights and angles to better simulate the water flow in the natural environment. Among them, the wave pump 6 can adopt the SW and OW models of the Jebao wave pump or the QZB submersible axial flow pump, Shenpeng electronic wave pump or other models of wave pump 6. You can also choose a suitable model of wave pump 6 according to the size of the water tank 3. At the same time, different numbers of wave pumps 6 (2-4 sets are recommended) are set according to the area of ​​the water tank 3, and they are set in the long axis or diagonal direction. By adjusting the speed and the wave pump 6 The number of operations adjusts the water flow rate during the training process; the delivery structure 4 is used to deliver natural enemy pheromones into the water tank 3, so as to train the escape ability of the yellow croaker seedlings and avoid being preyed upon; the camera 5 is arranged on the inner wall of the water tank 3, about 75 cm away from the bottom of the water tank 3, and the camera 5 is an industrial-grade infrared high-speed waterproof camera with a high waterproof level, which can work underwater, and its position, height and shooting angle can be adjusted. The number is 2-4 (one is fixedly set at the wave pump 6, and the rest are freely set according to the area of ​​the water tank 3). By setting the camera 5, the training situation of the yellow croaker seedlings can be observed, the dynamics of the fish in the water tank 3 can be monitored 24 hours a day, and the video can be periodically saved in the hard disk;The controller 1 is electrically connected to the camera 5, the light source 2, and a plurality of wave-making pumps 6. The controller 1 may be a central computer that may process data, images, etc. The camera 5 is used to collect behavioral characteristic information of large yellow croaker during wild training and send the behavioral characteristic information to the controller 1. A storage unit and an analysis unit are provided in the controller 1. The storage unit is used to store the behavioral characteristic information of large yellow croaker during wild training collected by the camera 5 and the behavioral characteristic information of large yellow croaker in the marine ecosystem. The analysis unit compares the behavioral characteristic information of large yellow croaker during wild training collected by the storage unit and the behavioral characteristic information of large yellow croaker in the marine ecosystem. The fish behavior analysis system is used to comprehensively analyze the swimming of large yellow croaker seedlings in the water tank 3 and the use of fish reefs 7, and the effect of the wild training is analyzed and determined. The device is used for the training of yellow croaker seedlings for reproduction and release and wilding. Before release, the swimming ability, feeding ability and escape ability of the yellow croaker seedlings are trained. Before use, a plurality of fish reefs 7 are arranged in the water tank 3, and the fish reefs 7 are used to simulate the reefs that can be avoided in the natural environment. The camera 5 is installed in the water tank 3 so that the camera 5 can capture the behavioral characteristic information of the yellow croaker seedlings in all directions. When in use, the yellow croaker seedlings are placed in the water tank 3, and the light source 2 is adjusted to simulate the light cycle changes under natural conditions. The wave-making pump 6 is started to simulate the flow rate and fluctuation of the water flow under the natural environment to train the swimming ability of the yellow croaker seedlings. The natural enemy pheromone can be released into the water tank 3 through the delivery structure 4, so as to train the escape ability of the yellow croaker seedlings, that is, the prey ability. At the same time, the feeding ability can be trained by putting feed in the water tank 3. In the process of the above-mentioned ability training, the behavioral characteristics during training can be recorded by the camera 5, and the final training effect can be obtained by comparing and analyzing with the fish behavior analysis system. When the training reaches the standard, the trained yellow croaker seedlings can be released into the wild. Among them, the fish analysis system technology is already very mature, and commercial software on the market can also meet the needs of use, such as: Noldus's animal movement trajectory tracking system (Ethovision XT). ;

[0025] This embodiment provides a specific structure of a delivery structure 4, such as Figure 2As shown, further, the delivery structure 4 includes: a tube body 41, a storage tank 43, and a water pump 42. One end of the tube body 41 is located in the water tank 3, the tube body 41 is close to the wave-making pump 6, and the tube body 41 is a PVC water pipe with a diameter of 50 mm; the storage tank 43 is arranged on the side wall of the water tank 3, and the storage tank 43 stores natural enemy pheromones. A water pump 42 is arranged in the storage tank 43, and the water pump 42 is electrically connected to the controller 1. The output end of the water pump 42 is connected to the other end of the tube body 41. The water pump 42 is used to deliver the natural enemy pheromones in the storage tank 43 into the water tank 3 through the tube body 41. The water pump 42 is a 200-400W pump. When it is necessary to train the ability to be preyed on, by starting the water pump 42, the natural enemy pheromones in the storage tank 43 are delivered into the water tank 3 through the tube body 41, so as to train the ability of large yellow croaker seedlings to escape and avoid being preyed on. The pipe body 41 is close to the wave-making pump 6 so that the natural enemy pheromone can be diffused more quickly and evenly in the water tank 3 when the natural enemy pheromone is released.

[0026] Furthermore, the natural enemy pheromone is a diluted solution of ground sea bass, sea eel and grouper muscles, and the release of the natural enemy pheromone can put large yellow croaker fry into a state of alert.

[0027] Furthermore, the invention also includes: the shell 10 is used to hold feed, and a plurality of through holes are provided on the shell 10, and the plurality of through holes facilitate the feed in the shell 10 to leak out, and the shell 10 is placed in the water tank 3 when in use. When the shell 10 is placed in the water tank 3, the wave pump 6 can be turned on, and the wave pump 6 is used to make the water flow fluctuate, so that the shell 10 can be fluctuated to move in the water tank 3, and at the same time, the feed leaked from the plurality of through holes can be scattered everywhere on the water surface of the water tank 3, so as to facilitate the training of the feeding ability of the large yellow croaker seedlings.

[0028] like Figure 2 As shown, further, the bottom of the water tank 3 is connected with a water inlet pipe 8 and a sewage pipe 9, the water inlet pipe 8 is used for water intake, and the sewage pipe 9 is used for water discharge and discharge of excrement and food residues of the large yellow croaker fry.

[0029] Example 2 A method for training large yellow croaker fry for proliferation, release and wilding is implemented using the large yellow croaker fry for proliferation, release and wilding training device in Example 1, comprising the following steps: The first step: placing the large yellow croaker fry to be trained into the water tank 3; Step 2: The controller 1 controls the light intensity and light cycle of the light source 2 to simulate the light environment and cycle of the marine ecosystem, so as to train the large yellow croaker seedlings in a more realistic living environment; Step 3: The controller 1 controls the multiple wave pumps 6 to work, simulates the water flow environment of the marine ecosystem, trains the swimming ability of the yellow croaker fry, and enables the yellow croaker fry to adapt to the real water flow velocity in the ocean after being released; Step 4: Feed feed to train the yellow croaker fry's ability to prey; Step 5: The controller 1 controls the water pump 42 to work, and the natural enemy pheromone in the storage tank 43 is put into the water tank 3 through the pipe body 41, so as to train the ability of the yellow croaker seedlings to avoid being preyed on, which is specifically reflected by the fish reef 7. After the natural enemy pheromone is put into the water tank 3, the yellow croaker seedlings need to hide in the fish reef 7 to train their avoidance ability; Step 6: The camera 5 collects the behavioral characteristic information of the large yellow croaker fry in the wild training, and sends the behavioral characteristic information to the controller 1; Step 7: The analysis unit in the controller 1 compares the behavioral characteristic information of the yellow croaker in the wild training and the behavioral characteristic information of the yellow croaker in the marine ecosystem stored in the storage unit, and comprehensively analyzes the swimming of the yellow croaker seedlings in the tank 3 and the use of the fish reef 7 through the fish behavior analysis system to analyze and determine the effect of the wild training; Step 8: When the training effect after analysis meets the standards, the yellow croaker fry will be released into the wild. When the training effect after analysis does not meet the standards, the yellow croaker fry will continue to be trained or will be eliminated.

[0030] This device can train the released yellow croaker seedlings to swim, feed and escape from predation, enhance the ability of artificially bred and released seedlings to adapt to the natural marine environment, improve the survival rate of released seedlings, and thus improve the proliferation effect of yellow croaker after release.

[0031] The present embodiment provides a method for training the swimming ability of large yellow croaker fry, comprising the following steps: Step 1: The controller 1 controls the flow rate of multiple wave pumps 6 to be controlled at 0.2m / s-0.25m / s to form a gentle water flow. After 24h-48h, the adaptation of the large yellow croaker seedlings is observed to make the large yellow croaker seedlings adapt to the water flow with a flow rate; The second step: when the difference between the swimming speed of the large yellow croaker seedlings in the water tank 3 and the flow velocity of the wave-making pump 6 is within ± 0.02m / s, that is, when the swimming speed of the large yellow croaker seedlings is close to the flow velocity of the wave-making pump 6, it means that the large yellow croaker seedlings have adapted to the flow velocity in the water tank 3, and the flow velocity of multiple wave-making pumps 6 is gradually increased. The flow velocity of multiple wave-making pumps 6 is adjusted every 2h, and the flow velocity difference adjusted each time is 0.02m / s-0.05m / s, and the flow velocity difference adjusted each time is equal, such as increasing 0.02m / s each time when adjusting, when the flow velocity of the wave-making pump 6 is adjusted to 0.45m / s, it is recorded as a round of uniform speed training; The third step: when the difference between the swimming speed of the large yellow croaker seedlings in the water tank 3 and the flow velocity of the wave-making pump 6 is within ± 0.02m / s, the swimming speed of the large yellow croaker seedlings is close to the flow velocity of the wave-making pump 6, and the flow velocity of multiple wave-making pumps 6 is gradually increased. The flow velocity of multiple wave-making pumps 6 is adjusted every 2h, and the flow velocity difference adjusted each time is 0.02m / s-0.05m / s, and the flow velocity difference adjusted each time is not equal, such as increasing by 0.02m / s during this adjustment, and increasing by 0.04m / s during the next adjustment. The flow velocity during two adjacent adjustments is not equal. When the flow velocity of the wave-making pump 6 is adjusted to 0.45m / s, it is recorded as a round of speed change training; Step 4: During the 4-6 day domestication process, conduct a round of uniform speed training one day and a round of variable speed training every other day, alternating to complete the swimming ability training of the large yellow croaker fry.

[0032] By setting the number, speed and direction of the wave pump 6, a circulation with different flow rates is formed in the water tank 3 or the water flow is pushed to form water waves, so that the yellow croaker seedlings gradually adapt to the changing pattern of the water flow, improve their autonomous swimming ability, and can actively eat compound feed. Among them, 0.45m / s is the maximum swimming speed that the yellow croaker seedlings can reach without exhaustion. Adjusting the water flow to 0.45m / s can train their swimming speed. If the yellow croaker seedlings are exhausted during the above swimming ability training, the training at this stage will be stopped immediately, and the water flow speed will be appropriately adjusted.

[0033] Example 3 As a further improvement on Example 2, this example provides a method for training the predation ability of large yellow croaker fry by feeding feed, comprising the following steps: Step 1: During the uniform speed training or variable speed training, a small amount of Artemia is placed into the shell 10, and the shell 10 is placed into the water tank 3. After an interval of 1 hour, a certain amount of pellet feed is added according to the feeding situation; Step 2: Repeat the above feeding method for 3-5 days, and gradually increase the amount of Artemia and reduce the amount of pellet feed; Step 3: From the 6th to the 10th day, the pellet feed is completely replaced by Artemia; Step 4: After the 10th day, gradually reduce the feeding of Artemia, and at the same time put shrimp fry into the tank 3, and increase the amount of shrimp fry day by day until the shrimp fry completely replaces Artemia.

[0034] The above method for training the predation ability of yellow croaker seedlings is mainly that after the yellow croaker seedlings adapt to the environment of the water tank 3, according to their feeding habits, they are first fed and domesticated in the form of "granular feed + live bait (shrimp seedlings or Artemia)", and then the proportion of live bait is gradually increased. After they are fully adapted to the feeding of live bait, the feeding amount of granular feed is gradually reduced to gradually enhance the autonomous predation ability of the yellow croaker seedlings, so that they gradually adapt to the marine natural environment in terms of bait type and predation ability. Among them, when feeding, the feed food is placed in the shell 10, and the wave pump 6 is started at the same time. The shell 10 is driven by the water flow rate to swim irregularly in the water tank 3 and the feed can be better leaked from the through hole, so that the yellow croaker seedlings take the initiative to eat and exercise their feeding ability. In addition, the feeding ability training is carried out simultaneously during the uniform speed training or variable speed training, which can better simulate the training of predation ability under the water flow rate of the natural environment.

[0035] Among them, the other structures of this embodiment are consistent with those of Embodiment 2, and are just optimizations made to Embodiment 2.

[0036] Example 4 As a further improvement scheme based on Example 2, further, training the ability of large yellow croaker fry to avoid being preyed upon comprises the following steps: The first step: the controller 1 controls the flow rate of multiple wave pumps 6 to be controlled at 0.2m / s-0.25m / s to form a gentle water flow, observe the adaptation of the large yellow croaker seedlings, and train the large yellow croaker seedlings to escape after they adapt to the flow rate; Step 2: When the difference between the swimming speed of the yellow croaker fry in the water tank 3 and the flow rate of the wave pump 6 is within ±0.02 m / s, the swimming speed of the yellow croaker fry is close to the flow rate of the wave pump 6, and the controller 1 controls the water pump 42 to work, and a certain amount of natural enemy pheromone in the storage tank 43 is released into the water tank 3 through the pipe body 41, so that the yellow croaker fry produces the stress of being preyed on and escapes quickly in a burst swimming manner; Step 3: The camera 5 collects the behavioral characteristic information of the large yellow croaker seedlings within 10 seconds and sends it to the controller 1. The controller 1 calculates the burst swimming speed of the seedlings according to the swimming distance of the seedlings within 10 seconds. The calculation formula is "s=vt", s is the distance, that is, the swimming distance within 10 seconds, t is the time, that is, 10 seconds, and v is the speed, that is, the burst swimming speed of the seedlings; Step 4: When the yellow croaker fry produce a rapid escape reaction and restore the uniform speed after a period of time, that is, the swimming speed will be slowly reduced until the uniform speed is close to the flow rate of the wave pump 6, which is recorded as one round of escape training. During the domestication period, six rounds of escape training are performed every day; Step 5: When the swimming distance of the yellow croaker fry within 1 minute under predation stress is stabilized at 25-30m for three consecutive times, the training of its ability to avoid predation is completed.

[0037] According to the area of ​​tank 3 and the density of fry, a certain amount of tissue mixture of ferocious predatory fish is released at a fixed time every day, thereby creating predation stress on the large yellow croaker fry. Their ability to avoid predation is evaluated through specific anti-predation behaviors (freezing time and fish reef 7 utilization rate), ultimately improving their survival rate after release.

[0038] Furthermore, the fish behavior analysis system is used to comprehensively analyze the wild training effect of the large yellow croaker fry in the water tank 3. When the flow rate of the wave pump 6 is 0.45m / s, the large yellow croaker fry to be trained can swim against the current for 10 minutes, and the swimming speed change range does not exceed ±0.02m / s. At the same time, within 6-10 minutes of adding natural enemy pheromones, 45%-60% of the large yellow croaker fry activity area is within the fish reef 7, then the training effect meets the standard. In addition, the fish behavior analysis system is used to analyze the swimming and fish reef 7 usage of the yellow croaker fry. The yellow croaker fry whose training effect meets the standard still needs actual training. The wave pump 6 is still turned on during training. When the yellow croaker fry swims against the current at a water flow speed of 0.45 m / s for more than 10 minutes, and the survival rate of the trained fish reaches more than 75% after natural enemy fish are added to the tank 3 for 1 hour, the training effect meets the standard and can be released; when the yellow croaker fry swims against the current at a water flow speed of 0.45 m / s for less than 10 minutes, or the survival rate of the trained fish reaches less than 75% after natural enemy fish are added to the tank for 1 hour, the training effect does not meet the standard and needs to be trained again or eliminated.

[0039] Furthermore, the capacity of the natural enemy pheromone added into the water tank 3 is 5%-8% of the water capacity in the water tank 3 .

[0040] Among them, the other structures of this embodiment are consistent with those of Embodiment 2, and are just optimizations made to Embodiment 2.

[0041] The present invention can provide a more realistic natural seawater environment for the wild training of released seedlings, comprehensively improve the wild survival ability of released seedlings from the aspects of environmental adaptability, feed type conversion, enhanced swimming ability, improved predation ability and avoiding natural enemies, etc., and introduce natural enemy pheromones in a targeted manner based on the biological characteristics of large yellow croaker and the predator signal recognition mechanism, so as to train its ability to avoid predation and coercion more efficiently; at the same time, the video and image depth analysis is carried out for the behavioral characteristics of large yellow croaker seedlings in the wild training process, and a database is established to provide a reference for the study of the growth and development and adaptability evaluation of large yellow croaker seedlings after release, and provide theoretical data for the artificial breeding of the species. The present invention can also be enlarged and used in outdoor cement ponds and factory-scale circulation aquaculture systems for the wild training of large-scale proliferation of released fish seedlings.

[0042] The advantages of the present invention are that the present invention is used to domesticate the swimming, feeding and predation-avoidance abilities of released large yellow croaker seedlings, enhance the ability of artificially bred and released seedlings to adapt to the natural marine environment, improve the survival rate of released seedlings, and thus enhance the proliferation effect of large yellow croaker after release.

[0043] The above disclosures are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A large yellow croaker fry proliferation and release training device, characterized in that: include: A water tank (3) for containing water, wherein a plurality of fish reefs (7) are placed in the water tank (3); A light source (2) is arranged above the water tank (3) and is used to simulate the periodic changes of light under natural conditions; A plurality of wave-making pumps (6) are evenly arranged on one side of the inner wall of the water tank (3) and are used to fluctuate the water flow in the water tank (3); A delivery structure (4) for delivering natural enemy pheromones into the water tank (3); A camera (5) is arranged on the inner wall of the water tank (3); A controller (1) is electrically connected to the camera (5), the light source (2), and the plurality of wave-making pumps (6). The camera (5) is used to collect behavioral characteristic information of large yellow croaker during wild training and send the behavioral characteristic information to the controller (1). The controller (1) is provided with a storage unit and an analysis unit. The storage unit is used to store the behavioral characteristic information of large yellow croaker during wild training collected by the camera (5) and the behavioral characteristic information of large yellow croaker in the marine ecosystem. The analysis unit compares the behavioral characteristic information of large yellow croaker during wild training collected by the storage unit and the behavioral characteristic information of large yellow croaker in the marine ecosystem. The fish behavior analysis system comprehensively analyzes the swimming of large yellow croaker seedlings in the water tank (3) and the use of fish reefs (7), and analyzes and determines the effect of the wild training.

2. A large yellow croaker fry proliferation and release training device according to claim 1, characterized in that: The delivery structure (4) includes: A pipe body (41), one end of which is located in the water tank (3), and the pipe body (41) is close to the wave-making pump (6); A storage tank (43) is arranged on the side wall of the water tank (3); natural enemy pheromones are stored in the storage tank (43); a water pump (42) is arranged in the storage tank (43); the water pump (42) is electrically connected to the controller (1); an output end of the water pump (42) is connected to the other end of the tube body (41); the water pump (42) is used to release the natural enemy pheromones in the storage tank (43) into the water tank (3) through the tube body (41).

3. A large yellow croaker fry proliferation and release training device according to claim 2, characterized in that: The natural enemy pheromone is a diluted solution of sea bass, sea eel and grouper muscle grindings.

4. A large yellow croaker fry proliferation and release training device according to claim 2, characterized in that: Also includes: The shell (10) is used to hold feed, and a plurality of through holes are provided on the shell (10). When in use, the shell (10) is placed in the water tank (3).

5. The large yellow croaker fry proliferation and release training device according to claim 1, characterized in that: The bottom of the water tank (3) is connected to a water inlet pipe (8) and a sewage pipe (9), wherein the water inlet pipe (8) is used for water intake, and the sewage pipe (9) is used for water discharge and discharge of excrement and food residues of the large yellow croaker fry.

6. A method for training large yellow croaker fry for proliferation, release and wilding, using the large yellow croaker fry proliferation, release and wilding training device according to claim 4, characterized in that: The following steps are involved: Place the large yellow croaker fry to be trained into the water tank (3); The controller (1) controls the light intensity and light cycle of the light source (2) to simulate the light environment of the marine ecosystem; The controller (1) controls the plurality of wave-making pumps (6) to operate, simulating the water flow environment of the marine ecosystem and training the swimming ability of large yellow croaker fry; Feeding feed to train the large yellow croaker fry's ability to hunt; The controller (1) controls the water pump (42) to operate, and releases the natural enemy pheromone in the storage tank (43) into the water tank (3) through the tube body (41), so as to train the large yellow croaker fry to avoid being preyed upon; The camera (5) collects behavioral characteristic information of the large yellow croaker fry in the wild training, and sends the behavioral characteristic information to the controller (1); The analysis unit in the controller (1) compares the behavioral characteristic information of the yellow croaker during the wild training and the behavioral characteristic information of the yellow croaker in the marine ecosystem stored in the storage unit, and comprehensively analyzes the swimming and fish reef (7) usage of the yellow croaker fry in the tank (3) through the fish behavior analysis system to analyze and determine the effect of the wild training; When the training effect after analysis meets the standards, the yellow croaker fry will be released into the wild. When the training effect after analysis does not meet the standards, the yellow croaker fry will continue to be trained.

7. A method for training large yellow croaker fry for proliferation, release and wilding according to claim 6, characterized in that: Training the swimming ability of large yellow croaker fry includes the following steps: The controller (1) controls the flow rate of the plurality of wave-making pumps (6) to be controlled at 0.2 m / s-0.25 m / s, thereby forming a gentle water flow, and after 24 h-48 h, observing the adaptability of the large yellow croaker fry; When the difference between the swimming speed of the large yellow croaker fry in the water tank (3) and the flow speed of the wave-making pump (6) is within ±0.02 m / s, the flow speeds of the plurality of wave-making pumps (6) are gradually increased, and the flow speeds of the plurality of wave-making pumps (6) are adjusted once every 2 hours, and the flow speed difference adjusted each time is 0.02 m / s-0.05 m / s, and the flow speed difference adjusted each time is equal. When the flow speed of the wave-making pump (6) is adjusted to 0.45 m / s, it is recorded as one round of uniform speed training; When the difference between the swimming speed of the large yellow croaker fry in the water tank (3) and the flow speed of the wave-making pump (6) is within ±0.02 m / s, the flow speeds of the plurality of wave-making pumps (6) are gradually increased, and the flow speeds of the plurality of wave-making pumps (6) are adjusted once every 2 hours, and the flow speed difference adjusted each time is 0.02 m / s-0.05 m / s, and the flow speed difference adjusted each time is not equal. When the flow speed of the wave-making pump (6) is adjusted to 0.45 m / s, it is recorded as one round of speed change training; During the 4-6 day domestication process, one round of uniform speed training is conducted one day and one round of variable speed training is conducted every other day, alternating to complete the swimming ability training of large yellow croaker fry.

8. A method for training large yellow croaker fry for proliferation, release and wilding according to claim 7, characterized in that: Feeding feed to train the ability of large yellow croaker fry to prey includes the following steps: During the uniform speed training or variable speed training, a small amount of Artemia is simultaneously placed into the shell (10), and the shell (10) is placed into the water tank (3), and a certain amount of granular feed is supplemented after an interval of 1 hour according to the feeding situation; Repeat the above feeding method for 3-5 days, and gradually increase the amount of Artemia and reduce the amount of pellet feed. On the 6th to 10th day, Artemia completely replaced the pelleted feed; After the 10th day, the feeding of Artemia is gradually reduced, and shrimp fry is placed in the water tank (3) at the same time, and the amount of shrimp fry is increased day by day until the shrimp fry completely replaces the Artemia.

9. A method for training large yellow croaker fry for proliferation, release and wilding according to claim 7, characterized in that: Training large yellow croaker fry to avoid being preyed upon includes the following steps: The controller (1) controls the flow rate of the plurality of wave-making pumps (6) to be controlled within a range of 0.2 m / s to 0.25 m / s, thereby forming a gentle water flow and observing the adaptability of the large yellow croaker fry; When the difference between the swimming speed of the large yellow croaker fry in the water tank (3) and the flow rate of the wave-making pump (6) is within ±0.02 m / s, the controller (1) controls the water pump (42) to operate, and releases a certain amount of natural enemy pheromone in the storage tank (43) into the water tank (3) through the tube body (41), so that the large yellow croaker fry feel threatened by being preyed on and escape quickly by swimming in an explosive manner; The camera (5) collects behavioral characteristic information of the large yellow croaker fry within 10 seconds and sends it to the controller (1), and the controller (1) calculates the burst swimming speed of the fry according to the swimming distance of the fry within 10 seconds; When the large yellow croaker fry produce a rapid escape response and recover to a constant speed after a period of time, it is recorded as one round of escape training. During the domestication period, six rounds of escape training are carried out every day. When the swimming distance of the large yellow croaker fry within 1 minute under predation stress is stabilized at 25-30m for three consecutive times, the training of its ability to avoid predation is completed.

10. A method for training large yellow croaker fry for proliferation, release and wilding according to claim 9, characterized in that: When the flow rate of the wave pump (6) is 0.45 m / s, the yellow croaker fry to be trained swims against the current for 10 minutes, and the swimming speed changes by no more than ±0.02 m / s. At the same time, within 6-10 minutes of adding the natural enemy pheromone, 45%-60% of the yellow croaker fry's activity area is within the fish reef (7), then the training effect meets the standard.

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