Eaststar marlin circling water breeding system and method for promoting production

Abstract

The application discloses a kind of east star spot circulating water breeding system and method for promoting production simulating natural ocean current, belong to aquaculture engineering technical field.The application of a kind of east star spot circulating water breeding system and method for promoting production simulating natural ocean current, system includes: breeding pond body structure, bionic water flow stimulation subsystem, circulating water treatment subsystem and intelligent control subsystem;Method includes system preparation and east star spot parent fish enters pool stage, gonad development promotion stage, spawning induction stage and postpartum management stage.The application solves the problems of single fixed water flow mode, extensive gonad development stimulation method, dependence on artificial insemination, low automation degree and low overall breeding efficiency in the prior art of east star spot circulating water breeding.The application constructs an integrated circulating water aquaculture environment, accurately simulates the complex tidal and ocean current conditions of east star spot natural spawning ground, thereby effectively stimulates parent fish gonad development synchronization, triggers its natural reproduction behavior, and significantly improves spawning quantity and fertilization rate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aquaculture engineering, in particular to a kind of east star spot circulating water breeding system simulating natural ocean current and production promoting method. BACKGROUND

[0002] East star spot is a kind of high economic value warm water coral reef fish, and the main difficulty of artificial breeding is that east star parent fish often appears in artificial environment Gonadal development is not synchronized, the efficiency of inducing production is low, and the fertilization rate is not ideal.

[0003] At present, the most mainstream technical scheme in the field of east star artificial breeding is conventional circulating water aquaculture system (RAS) + basic environmental factor regulation, and the core design goal of this scheme is to maintain clean water and stable environment, rather than to simulate the hydrodynamic characteristics required for natural reproduction. Its specific structure and application mode are as follows:

[0004] 1. System composition: a closed loop is formed by connecting breeding pond, physical / biological filter, protein separation, disinfection, oxygenation and temperature control equipment, and the core function is to remove pollutants and maintain stable basic water quality.

[0005] 2. Water flow design: adopt "single / multi-point water inlet + pusher" mode, take "pollution collection" as the core, the water flow is unidirectional or disordered, the flow rate is fixed or only artificially adjusted, and the complex flow field such as upwelling flow and vortex flow in natural sea area cannot be simulated, and the reproductive ecological stimulation is lacking.

[0006] 3. Production promoting method: rely on nutrition enhancement (feeding high-protein / hormone bait) and light and temperature regulation to stimulate gonadal development, but due to the lack of hydrodynamic stimulation, the gonadal development of parent fish is not synchronized, and the natural spawning behavior is difficult to trigger, and artificial insemination is needed; Artificial insemination is complicated, inefficient, and easy to damage the quality of parent fish and fish eggs, which restricts large-scale breeding.

[0007] In summary, the core defects of the existing system are: first, the water flow mode is single, and the reproductive hydrological stimulation is lacking; Second, the production promoting method is extensive, and the gonadal development is not synchronized; Third, natural spawning induction fails, and artificial insemination has many disadvantages; Fourth, the regulation relies on artificial experience, and the breeding stability and repeatability are poor; Fifth, the system design deviates from the breeding needs, and does not form a synergistic production promoting system, and the overall efficiency is low. Therefore, it does not meet the existing needs, and we propose a kind of east star spot circulating water breeding system simulating natural ocean current and production promoting method. SUMMARY

[0008] The application aims to provide a Eaststar grouper circulating water breeding system and a spawning method for simulating natural ocean current, which can simulate the complex tidal and ocean current conditions of the natural spawning ground of Eaststar grouper, thereby effectively stimulating the synchronous development of the gonad of parent fish, triggering the natural breeding behavior, and significantly improving the spawning quantity and fertilization rate, and solving the problems in the above background technology.

[0009] To achieve the above-mentioned purpose, the application provides the following technical scheme: a Eaststar grouper circulating water breeding system and a spawning method for simulating natural ocean current, comprising;

[0010] A Eaststar grouper circulating water breeding system for simulating natural ocean current, comprising a breeding pool structure, a bionic water flow stimulation subsystem, a circulating water treatment subsystem and an intelligent control subsystem, each subsystem is organically connected through a pipeline network and an electrical line to form a closed-loop circulating water breeding system;

[0011] The breeding pool structure is used for simulating the natural spawning ground, setting the feeding and resting area of Eaststar grouper parent fish, and real-time monitoring the behavior and spawning process of Eaststar grouper parent fish and collecting fish eggs;

[0012] The bionic water flow stimulation subsystem is used for generating a three-dimensional dynamic flow field with complex and variable space-time distribution in the breeding pool;

[0013] The circulating water treatment subsystem is used for ensuring the stability of the water quality of the circulating water body, and providing a clean environment for the growth and reproduction of Eaststar grouper parent fish;

[0014] The intelligent control subsystem is used for realizing the automatic and accurate regulation and self-adaptive adjustment of the water flow mode and water quality parameters.

[0015] Preferably, the breeding pool structure comprises a pool body, an observation device and an egg collecting device, the pool body comprises a deep water area and a shallow water area, the deep water area is used for simulating the natural spawning ground, and the shallow water area is used for feeding and resting; a drain port is arranged at the lowest point of the center of the pool bottom of the pool body, and water outlet mounting interfaces are preset on the pool walls at different heights and angles; the observation device is an underwater camera, which is used for real-time monitoring the behavior and spawning process of Eaststar grouper parent fish; and the egg collecting device is arranged at the front end of the drain port, which is used for efficiently collecting fish eggs.

[0016] Preferably, the biomimetic water flow stimulating subsystem comprises a three-level distributed pipe network system and a three-dimensional multi-dimensional water outlet array. The three-level distributed pipe network system comprises a first-level main pipe, second-level branch pipes and third-level terminal pipes. The first-level main pipe is arranged around the bottom of the pool wall of the pool body. The second-level branch pipes are evenly distributed from the first-level main pipe along the pool wall of the pool body, for realizing regional distribution of water flow. The third-level terminal pipes are distributed from each second-level branch pipe, for realizing accurate distribution of water flow. The three-dimensional multi-dimensional water outlet array comprises bottom water outlets, middle layer water outlets, upper layer water outlets and special function water outlets. The bottom water outlets are installed on the pool bottom of the pool body, for generating upward water flow. The middle layer water outlets are installed on the middle part of the pool wall of the pool body, arranged in the horizontal direction, for generating transverse circulation. The upper layer water outlets are installed on the upper part of the pool wall of the pool body, for generating surface disturbance water flow. The special function water outlets are additionally arranged in the central deep water area of the pool body, for triggering spawning behavior of the parent fish.

[0017] Preferably, the circulating water treatment subsystem comprises a physical filtration unit, a biological purification unit, a gas exchange unit and a sterilization unit. The physical filtration unit is used for removing solid suspended matters in the water body, including leftover feed, feces and other particulate matters. The biological purification unit is used for converting toxic and harmful substances in the water body into non-toxic nitrate through microbial communities attached to the filler surface. The gas exchange unit is used for removing dissolved organic matters, colloidal particles and part of harmful gases in the water body, and increasing the dissolved oxygen content of the water body. The sterilization unit is used for killing pathogenic microorganisms in the water body and improving water quality.

[0018] Preferably, the intelligent control subsystem comprises a main controller, a regional controller, an execution device, a sensor acquisition module and a man-machine interaction interface. The main controller adopts an industrial programmable logic controller, is used for receiving acquisition data of each sensor acquisition module, executing a preset control program, and sending control instructions to the regional controller and the execution device. The execution device comprises a variable frequency water pump, an electric regulating valve and an electromagnetic valve. The sensor acquisition module comprises a water quality multi-parameter sensor, a flow rate sensor and an underwater camera. The man-machine interaction interface is used for parameter setting of the control program, real-time display of the running state and query of historical data. The intelligent control subsystem is internally provided with a self-adaptive adjustment algorithm based on biological feedback and a multi-mode water flow control algorithm coupled with the reproductive cycle of the P. orientalis.

[0019] A P. orientalis circulating water breeding and spawning promoting method simulating natural ocean current is applied to a P. orientalis circulating water breeding system simulating natural ocean current, and comprises the following steps:

[0020] S1: Start the intelligent control subsystem, perform initialization self-checking on the whole breeding system, control water quality parameters of the breeding water body through the circulating water treatment subsystem, put the P. orientalis parent fish into the breeding pool structure, and start the acclimation mode in the first week.

[0021] S2: After the end of domestication, the parent fish of Mars is fed with nutrient enrichment. The intelligent control subsystem dynamically adjusts the flow rate and angle of each water outlet according to the data collected by the flow rate sensor, and judges the gonadal maturity;

[0022] S3: When it is judged that the parent fish of Mars has entered the suitable spawning state, the system is switched to the spawning induction mode. The intelligent control subsystem controls the environmental parameters and stimulates spawning, and at the same time, it observes the spawning and collects the fish eggs;

[0023] S4: After spawning, clean the physical filtration unit and biological purification unit of the circulating water treatment subsystem, and the water outlet of the bionic water flow stimulation subsystem. Check the operation state of the sterilization unit, and calibrate the sensor acquisition module.

[0024] Preferably, S1 specifically includes:

[0025] Start the intelligent control subsystem, and initialize the self-check of the entire breeding system. Check the pipe network connection state of the bionic water flow stimulation subsystem and the operation of the water outlet;

[0026] Use the operation state of each processing unit of the circulating water treatment subsystem and the acquisition accuracy of the sensor acquisition module to ensure that all devices are operating normally;

[0027] Test the switching effect of each water flow mode through the intelligent control subsystem, calibrate the measurement data of the flow rate sensor and the water quality multi-parameter sensor, and ensure that the control accuracy of the water flow parameters and the water quality parameters meets the set requirements;

[0028] Adjust the water quality parameters of the breeding water body through the circulating water treatment subsystem, and start the sterilization unit to sterilize the water body;

[0029] Select the parent fish of Mars, and put the selected parent fish of Mars into the breeding pool structure. After entering the pool, start the gonadal development promotion mode of the intelligent control subsystem in the first week, adjust the water flow speed to a gentle water flow, and let the parent fish of Mars gradually adapt to the artificial simulated water flow environment;

[0030] Observe the feeding and activity state of the parent fish of Mars to ensure that the parent fish of Mars adapts to the breeding environment.

[0031] Preferably, S2 specifically includes:

[0032] After the end of domestication, the parent fish of Mars is fed with nutrient enrichment. The feeding time is selected in the period when the water flow speed is relatively flat;

[0033] Start the standard gonadal development promotion mode through the intelligent control subsystem, and dynamically adjust the flow rate and angle of each water outlet according to the data collected by the flow rate sensor, so as to ensure that a uniform multi-directional flow environment is formed inside the pool body;

[0034] Observe the activity state and feeding condition of the parent fish of the marbled goby through the underwater camera, and judge the gonadal maturity of the parent fish of the marbled goby;

[0035] When it is judged that the gonadal development of the parent fish of the marbled goby is normal, the current flow mode and the nutrition enhancement scheme are continued to be maintained;

[0036] When it is judged that the gonadal development of the parent fish of the marbled goby is slow, the flow rate is appropriately increased through the intelligent control subsystem, and the daily flow stimulation time is prolonged.

[0037] Preferably, the S3 specifically comprises:

[0038] When it is judged that the parent fish of the marbled goby has entered a suitable spawning state, the system is switched to a spawning induction mode;

[0039] Meanwhile, the light period is regulated through the intelligent control subsystem to ensure that the environmental parameters meet the spawning requirements of the marbled goby;

[0040] High-intensity flow stimulation of the spawning induction mode is started to simulate the changes of ocean currents at the spawning moment in the natural environment;

[0041] The spawning behavior of the parent fish of the marbled goby is monitored in real time through the underwater camera, after spawning is completed, the spawning induction mode is turned off, and the system is switched to a slow flow state, the overflow structure of the egg collecting device is used to collect fish eggs, the collected fish eggs are screened to remove unfertilized dead eggs and impurities, and then the fish eggs are transferred to a hatching pool for hatching.

[0042] Preferably, the S4 specifically comprises:

[0043] After spawning is completed, the intelligent control subsystem is switched to a postpartum recovery mode to strengthen the nutrition supplement of the parent fish of the marbled goby, and the health state of the parent fish of the marbled goby is observed regularly, if stress reaction or injury occurs, corresponding nursing measures are taken in time;

[0044] The physical filtration unit and the biological purification unit of the circulating water treatment subsystem are backwashed to clean the impurities and biological membranes in the filter, the operation state of the sterilization and disinfection unit is checked, and the aged filter material and disinfection components are replaced;

[0045] The water outlets of the bionic flow stimulation subsystem are cleaned to remove the attachments on the water outlets, and the sensor collection module is calibrated;

[0046] After the maintenance is completed, the system is adjusted to a standby state to prepare for the next breeding cycle.

[0047] Compared with the prior art, the present application has the following beneficial effects:

[0048] 1、The present application can generate various flow fields by designing three-stage distributed pipe network and three-dimensional multi-dimensional water outlet array, and realize programmed regulation and control of water flow parameters in combination with intelligent control, accurately simulate natural tide and ocean current characteristics, upgrade water flow from a pollution collection tool to a reproductive stimulation core factor, and fill the gap of water flow ecological simulation in the prior art.

[0049] 2、The present application activates HPG axis endocrine activity of parent fish by coupling staged programmed water flow stimulation with nutrition enhancement and light and temperature regulation, effectively improves the synchronization rate of gonadal development, and solves the problem of extensive production promotion in the prior art.

[0050] 3、The present application starts a specific mode at dusk during the spawning period and constructs a complex flow field in the deep water area in combination with the design of pool depth zoning, effectively triggers the complete reproduction behavior chain of parent fish, improves the natural spawning rate and fertilization rate, and avoids many drawbacks of artificial insemination.

[0051] 4、The present application takes industrial-grade PLC as the core, combines sensors and adaptive algorithms, realizes multi-factor automatic regulation and control, reduces artificial dependence, ensures the stability and repeatability of the breeding process, and provides technical support for large-scale industrialization.

[0052] 5、The present application improves the utilization rate of parent fish, the egg production of single tail female fish and the hatching rate of fish eggs by deeply integrating multiple subsystems around the reproduction promotion core, reduces the dependence on wild parent fish, and has significant economic and social benefits. BRIEF DESCRIPTION OF DRAWINGS

[0053] Fig. 1 is a schematic diagram of a simulated natural ocean current Eastarban cycle water breeding system of the present application;

[0054] Fig. 2 is a multi-mode water flow control algorithm flowchart of the present application;

[0055] Fig. 3 is a schematic diagram of a simulated natural ocean current Eastarban cycle water breeding and production promotion method of the present application. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0057] In order to solve the problems of single fixed water flow mode, rough stimulation method of gonadal development, dependence on artificial insemination, low automation degree and low overall breeding efficiency in the prior art, please refer to Figs. 1-3 The embodiment provides the following technical scheme:

[0058] A Eaststar grouper circulating water breeding system simulating natural ocean current comprises a breeding pool structure, a bionic water flow stimulation subsystem, a circulating water treatment subsystem and an intelligent control subsystem, each subsystem is organically connected through a pipeline network and an electrical circuit to form a closed-loop circulating water breeding system.

[0059] The breeding pool structure is used for simulating a natural spawning ground, setting feeding and resting areas of Eaststar grouper parent fish, and monitoring behaviors of the Eaststar grouper parent fish, spawning processes and collecting fish eggs in real time.

[0060] The bionic water flow stimulation subsystem is used for generating a three-dimensional dynamic flow field with complex and changeable space-time distribution in the breeding pool.

[0061] The circulating water treatment subsystem is used for guaranteeing water quality stability of the circulating water body and providing a clean environment for growth and reproduction of the Eaststar grouper parent fish.

[0062] The intelligent control subsystem is used for realizing automatic and accurate regulation and self-adaptive adjustment of water flow modes and water quality parameters.

[0063] The breeding pool structure comprises a pool body, an observation device and an egg collecting device, the pool body adopts an octagonal round corner design, avoids water flow dead angles and is beneficial to complex flow field formation, the pool body has a diameter of 5-8 meters, a depth of 1.5-2.0 meters and a water volume of 30-80 cubic meters, is made of PEV or cement, has a smooth inner wall without burrs, and the pool bottom of the pool body is designed as a gentle slope structure to form two functional areas, a central area is a deep water area with a depth of 1.8-2.0 meters and is used for simulating a natural spawning ground, and an edge area is a shallow water area with a depth of 1.2-1.5 meters and is used for setting feeding and resting areas; a drainage port is arranged at a lowest point of the pool bottom of the pool body, water outlet mounting interfaces are preset on the pool walls at different heights and angles, the observation device is an underwater camera and is used for monitoring behaviors of the Eaststar grouper parent fish and spawning processes in real time, and the egg collecting device is arranged at the front end of the drainage port, adopts an overflow type collecting structure and is used for efficiently collecting fish eggs.

[0064] The bionic water flow stimulation subsystem is the core unit for simulating natural ocean currents, comprising a three-level distributed pipe network system and a three-dimensional multi-dimensional water outlet array. The three-level distributed pipe network system comprises a first-level main pipe, a second-level branch pipe and a third-level terminal pipe. The first-level main pipe is arranged around the pool wall bottom of the pool body and adopts a ring-shaped closed loop design to ensure pressure balance in the pipe. The pipe diameter is DN80-DN100. The second-level branch pipe is evenly divided from the first-level main pipe and has a total of 8 pipes with a pipe diameter of DN40-DN50. The branch pipes are distributed radially along the pool wall of the pool body, with each branch pipe corresponding to a 45-degree sector area for realizing regional distribution of water flow. The third-level terminal pipe is divided from each second-level branch pipe into 3-4 pipes, with a total of 24-32 pipes and a pipe diameter of DN20-DN25. The terminal pipes are fixedly connected with the water outlets for realizing precise distribution of water flow. The three-dimensional multi-dimensional water outlet array comprises bottom water outlets, middle layer water outlets, upper layer water outlets and special function water outlets. Each water outlet adopts a detachable connection structure for easy maintenance and replacement. The bottom water outlets are installed 20-30 cm above the pool bottom of the pool body and are inclined upward by 15-30 degrees for generating upward water flow. The middle layer water outlets are installed in the middle part of the pool wall of the pool body and are arranged in the horizontal direction for generating horizontal circulation. The upper layer water outlets are installed in the upper part of the pool wall of the pool body and are inclined downward by 10-20 degrees for generating surface disturbance water flow. The special function water outlets are additionally provided in the central deep water area (preset spawning area) of the pool body and adopt high-frequency pulse nozzles to generate intermittent strong flow for triggering spawning behavior of the parent fish. The types of water outlets include adjustable duckbill water outlets, rotating spray heads and pulse nozzles. Each cubic meter of water body is configured with 0.8-1.2 water outlets. The flow velocity adjustment range is 5-50 cm / s, the horizontal direction angle adjustment range is 0-360 degrees, and the vertical direction angle adjustment range is -30 to +45 degrees. Different flow fields can be combined by angle adjustment.

[0065] The circulating water treatment subsystem comprises a physical filtration unit, a biological purification unit, a gas exchange unit and a sterilization and disinfection unit, each unit is connected in series through a pipeline, the input end is connected with the drainage port of the breeding pool body, and the output end is connected with the primary main pipeline of the bionic water flow stimulating subsystem; the physical filtration unit adopts a rotary drum filter or an arc screen, the filtration precision is 100-200 microns, and the physical filtration unit is used for removing solid suspended matters in the water body, including residual feed, feces and other particulate matters; the biological purification unit adopts a moving bed biological reactor, which is internally filled with polyethylene suspended filler, and is used for converting toxic and harmful substances such as ammonia nitrogen and nitrite in the water body into non-toxic nitrate through the microbial community attached to the surface of the filler, so as to realize biological purification of the water quality; the gas exchange unit is composed of a protein separator and a pure oxygen oxygenation device, the protein separator is used for removing dissolved organic matters, colloidal particles and part of harmful gases in the water body, and the pure oxygen oxygenation device is used for improving the dissolved oxygen content of the water body, so as to ensure that the dissolved oxygen concentration is greater than or equal to 6 mg / L; the sterilization and disinfection unit adopts a combination mode of an ultraviolet disinfection device and an ozone generator, the ultraviolet disinfection device is used for killing pathogenic microorganisms such as bacteria and viruses in the water body, the ozone generator is used for auxiliary disinfection and improvement of the water quality, and the two devices realize effective control of the pathogenic microorganisms through synergistic action.

[0066] The intelligent control subsystem comprises a main controller, a regional controller, an execution device, a sensor acquisition module and a man-machine interface. The main controller is an industrial programmable logic controller, which is used as the overall coordination core of the system, receives the collected data of the sensor acquisition module, executes the preset control program, and sends control instructions to the regional controller and the execution device. Each breeding pool is configured with a regional controller, which is responsible for the independent control of the pool body and realizes the parallel management of multiple pool bodies. The execution device comprises a variable frequency water pump, an electric regulating valve and an electromagnetic valve. The variable frequency water pump is provided with 3-5 units, and the total flow rate meets the circulation of 2-3 times per hour, which is used to provide power for the entire circulating water system. The electric regulating valve is provided with 8 units corresponding to the secondary branch pipelines, and each branch pipeline is configured with one unit, which is used to adjust the water flow of each fan-shaped area. The electromagnetic valve is provided with 24-32 units corresponding to the tertiary end pipelines, and each end pipeline is configured with one unit, which is used to control the water flow of each water outlet. The sensor acquisition module comprises a water quality multi-parameter sensor, a flow rate sensor and an underwater camera. The water quality multi-parameter sensor is used to collect the dissolved oxygen, pH value, temperature and salinity parameters of the water body in real time. The temperature control accuracy is ±0.5℃, the pH value control range is 7.8-8.2, and the salinity control range is 30-35‰. The flow rate sensor is arranged at the key area in the breeding pool and is used to monitor the water flow rate in real time. The underwater camera has a behavior recognition module in addition to the observation function, which is used to monitor the activity state and breeding behavior of the parent fish. The man-machine interface is designed by using a touch screen, which is used for parameter setting of the control program, real-time display of the running state and query of historical data. The operator can manually intervene in the system operation or modify the control parameters through the man-machine interface. The intelligent control subsystem is provided with a data storage module, which is used to record the water quality parameters, water flow parameters and parent fish behavior data, and provides data support for the optimization of the breeding process. The intelligent control subsystem is provided with a multi-mode water flow control algorithm coupled with the reproductive cycle of the Miichthys miiuy based on biological feedback and an adaptive adjustment algorithm based on biological feedback. The core logic of the adaptive adjustment algorithm based on biological feedback is that the system collects the behavior data of the parent fish through the underwater camera, combines the collected data of the flow rate sensor and the water quality multi-parameter sensor, and judges the adaptive state of the parent fish to the current water flow environment and water quality environment. If the parent fish is found to have stress behavior (such as rapid swimming, avoiding water flow, refusing to eat, etc.), the water flow rate or the water flow mode is automatically adjusted, and the water quality parameters are checked. If the parent fish is found to have breeding behavior such as courtship and pursuit, the current water flow mode and water quality parameters are maintained to ensure the smooth progress of the breeding process.

[0067] The multi-mode water flow control algorithm comprises three core control modes of gonadal development promotion mode, spawning induction mode and postpartum recovery mode. Each mode can be automatically or manually switched according to the switching of the reproductive stage of the Miichthys miiuy.

[0068] The gonadal development promotion mode is suitable for 2-3 months before the breeding season of the East Star, and the water flow characteristics of the mode are mild multidirectional flow, and the water flow speed is controlled at 10-25 cm / s, the main flow direction is changed every 2-4 hours, and the daily operation time is 16-20 hours, which is used to promote the metabolism of the parent fish and stimulate the gonadal development;

[0069] The spawning induction mode is suitable for the expected spawning period of the East Star, and the water flow characteristics of the mode are strong pulse flow, and the water flow speed is controlled at 25-40 cm / s, and the high-intensity water flow stimulation is performed 2-3 hours before and after dusk, which is used to trigger the spawning behavior of the parent fish;

[0070] The postpartum recovery mode is suitable for after the end of spawning of the East Star, and the water flow characteristics of the mode are mild and smooth flow, and the water flow speed is controlled at 5-15 cm / s, and the water flow mode is stable and rarely changed, which is used to reduce the stress of the parent fish and promote postpartum recovery;

[0071] The postpartum recovery mode is suitable for after the end of spawning of the East Star, and the water flow characteristics of the mode are mild and smooth flow, and the water flow speed is controlled at 5-15 cm / s, and the water flow mode is stable and rarely changed, which is used to reduce the stress of the parent fish and promote postpartum recovery;

[0072] The core control process of the multi-mode water flow control algorithm includes the following in turn: system initialization and self-checking; reading the water quality parameters, flow speed parameters and fish school behavior data collected by the monitoring device; selecting the corresponding basic water flow mode according to the breeding stage of the East Star; executing the water flow time sequence control of the selected mode; monitoring the fish school behavior response in real time; dynamically adjusting the water flow parameters based on the behavior feedback; judging whether the set time or triggering condition of mode switching is reached, if yes, switching to the next mode, if not, continuing to maintain the current mode; data recording and storage; and repeatedly executing the above process.

[0073] Working principle: The water in the structure of the culture pond body enters the circulating water treatment subsystem through the bottom drain, and is purified by the physical filtration unit, the biological purification unit, the gas exchange unit and the sterilization and disinfection unit in turn, and then is delivered to the primary main pipe of the bionic water flow stimulation subsystem by the variable frequency water pump; the intelligent control subsystem adjusts the running state of each electric regulating valve and electromagnetic valve through the regional controller according to the preset control program, adjusts the water flow and pressure of each branch, so that the water flows through the secondary branch pipe and the tertiary end pipe, and then forms the preset dynamic water flow environment in the structure of the culture pond body through the array of three-dimensional multidimensional water outlets; the monitoring device collects water quality parameters, water flow speed parameters and fish school behavior data in real time, and transmits the collected data to the main controller, and the main controller dynamically adjusts the control parameters according to the data feedback, so as to realize the self-adaptive adjustment of the water flow environment and the water quality environment.

[0074] A method for simulating natural ocean currents in the East Star circulating water breeding and production method is applied to a method for simulating natural ocean currents in the East Star circulating water breeding system, comprising the following steps:

[0075] S1: Start the intelligent control subsystem, initialize self-checking of the entire breeding system, control the water quality parameters of the aquaculture water body through the circulating water treatment subsystem, put the parent fish of Marsupenaeus enodentatus into the aquaculture pool structure, start the domestication mode in the first week, feed twice a day with regular feed, and help the parent fish of Marsupenaeus enodentatus to adapt to the environment;

[0076] S2: After the domestication is completed, the parent fish of Marsupenaeus enodentatus is fed with nutrition enhancement, the intelligent control subsystem dynamically adjusts the flow rate and angle of each water outlet according to the data collected by the flow rate sensor, and judges the gonadal maturity;

[0077] S3: When it is judged that the parent fish of Marsupenaeus enodentatus has entered the suitable spawning state, the system is switched to the spawning induction mode, the environmental parameters are controlled through the intelligent control subsystem, and the spawning stimulation is carried out, and the spawning observation and fish egg collection are carried out;

[0078] S4: After the spawning is completed, the physical filtration unit and the biological purification unit of the circulating water treatment subsystem and the water outlet of the bionic water flow stimulation subsystem are cleaned, the running state of the sterilization unit is checked, and the sensor collection module is calibrated.

[0079] S1 specifically includes:

[0080] Start the intelligent control subsystem, initialize self-checking of the entire breeding system, check the pipe network connection state of the bionic water flow stimulation subsystem and the running state of the water outlet;

[0081] Use the running state of each processing unit of the circulating water treatment subsystem and the collection accuracy of the sensor collection module to ensure that all devices are running normally;

[0082] Test the switching effect of each water flow mode through the intelligent control subsystem, calibrate the measurement data of the flow rate sensor and the water quality multi-parameter sensor, and ensure that the control accuracy of the water flow parameters and the water quality parameters meets the set requirements;

[0083] Control the water quality parameters of the aquaculture water body through the circulating water treatment subsystem, adjust the water temperature to 26-28℃, adjust the salinity to 30-35‰, adjust the pH to 7.8-8.2, control the dissolved oxygen content to ≥6mg / L, start the sterilization unit to run for 24 hours to sterilize the water, and ensure that the content of pathogenic microorganisms in the water meets the breeding requirements of Marsupenaeus enodentatus;

[0084] Select 2-3 year-old, healthy, no injury, weight standard and gonadal development initially mature parent fish of Marsupenaeus enodentatus, and control the ratio of male to female to be 2:1;

[0085] Select broodstock of the East Star Grouper and place them into the breeding pond structure. In the first week after entering the pond, activate the gonad development promotion mode of the intelligent control subsystem and adjust the water flow speed to a gentle flow of 5-10 cm / s to allow the broodstock of the East Star Grouper to gradually adapt to the artificially simulated water flow environment.

[0086] During the acclimatization period, feed the broodstock with basic feed twice a day and observe their feeding and activity levels to ensure they adapt to the aquaculture environment.

[0087] S2 specifically includes:

[0088] After domestication, the parent fish of the red grouper were fed a nutritionally fortified diet using a special breeding fortified feed for red grouper. Male and female parent fish were fed separately. The female fish's feed was supplemented with an appropriate amount of polyunsaturated fatty acids and vitamin E, while the male fish's feed was supplemented with an appropriate amount of zinc and vitamin C. They were fed 2-3 times a day, with the amount of feed being 3-5% of the parent fish's body weight. The feeding time was chosen when the water flow was relatively slow.

[0089] The standard gonadal development promotion mode is activated through the intelligent control subsystem. The water flow speed is controlled at 10-25 cm / s, and the main direction is changed every 2-4 hours. The daily operation time is 16-20 hours. Based on the data collected by the flow velocity sensor, the flow velocity and angle of each outlet are dynamically adjusted to ensure that a uniform multi-directional flow environment is formed inside the pool and to avoid dead zones in the water flow.

[0090] The activity and feeding of the parent grouper were observed by underwater cameras. The gonadal development of the parent grouper was checked by sampling every week. The maturity of the gonads of the parent grouper was judged by observing the appearance of the abdomen and gently pressing the abdomen.

[0091] If the female fish's abdomen gradually swells and feels soft to the touch, and the male fish shows obvious nuptial colors, it indicates that the gonads are developing normally. Once it is determined that the gonads of the parent grouper are developing normally, continue to maintain the current water flow pattern and nutrition enhancement program.

[0092] If it is determined that the gonadal development of the broodstock of the East Star Grouper is slow, the water flow speed is appropriately increased to 20-25 cm / s through the intelligent control subsystem, and the daily water flow stimulation time is extended to 20 hours.

[0093] S3 specifically includes:

[0094] When most female fish are found to have significantly enlarged abdomens, and a small number of eggs are released when the abdomen is gently pressed, and the male fish show prominent breeding colors and actively chase the female fish, it is determined that the parent fish of the East Star Grouper have entered a suitable spawning state, and the system is switched to the spawning induction mode.

[0095] At the same time, the light period is regulated to 14L:10D (14 hours of light and 10 hours of darkness) by the intelligent control subsystem, and the water temperature is maintained at 27-28℃ by the temperature control unit to ensure that the environmental parameters meet the spawning requirements of the Marsupenaeus enigmaticus;

[0096] The high-intensity water flow stimulation for spawning induction mode is started 2-3 hours before and after dusk (17:00-20:00), with a water flow speed of 25-40 cm / s, and the high-frequency pulse nozzles of the special function water outlet are started, with a pulse frequency of 0.5-1 Hz and a pulse duration of 1-3 seconds, simulating the changes in ocean currents at the time of spawning in the natural environment; the water flow speed is maintained at 20-25 cm / s during other periods to keep the Marsupenaeus enigmaticus broodstock active;

[0097] The spawning behavior of the Marsupenaeus enigmaticus broodstock is monitored in real time by the underwater camera, and when the pursuit, mating and spawning ejaculation behaviors of the Marsupenaeus enigmaticus broodstock are observed, the current water flow mode is maintained, and after the spawning is completed, the spawning induction mode is turned off and switched to a slow flow state with a water flow speed of 5-10 cm / s, and the fish eggs are collected through the overflow structure of the egg collection device, ensuring smooth water flow during the collection process to avoid damage to the fish eggs; The collected fish eggs are screened to remove unfertilized dead eggs and impurities, and are transferred to the incubation tank for incubation.

[0098] S4 specifically includes:

[0099] After spawning, the intelligent control subsystem is switched to the postpartum recovery mode, with a water flow speed of 5-15 cm / s to maintain a smooth and less variable water flow; the nutrition of the Marsupenaeus enigmaticus broodstock is supplemented, and high-protein recovery feed is fed twice a day, with the feeding amount adjusted according to the feeding condition of the Marsupenaeus enigmaticus broodstock; the health status of the Marsupenaeus enigmaticus broodstock is observed regularly, and appropriate nursing measures are taken in time if stress reaction or injury occurs;

[0100] The physical filter unit and biological purification unit of the circulating water treatment subsystem are backwashed to clean the impurities and biological membrane in the filter, and the operation state of the sterilization and disinfection unit is checked to replace the aged filter material and disinfection components;

[0101] The water outlet of the bionic water flow stimulation subsystem is cleaned to remove the attachments on the water outlet to ensure the normal operation of the subsequent water flow mode, and the sensor acquisition module is calibrated to ensure the measurement accuracy;

[0102] After the maintenance is completed, the system is adjusted to the standby state to prepare for the next breeding cycle.

[0103] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting, since the scope of the present application will be limited to the appended claims. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be apparent to one of ordinary skill in the art that many embodiments and variations of the present application can be practiced without departing from the spirit and scope of the application. Since embodiments of this application can be modified many times in various ways, the scope of the present application should not be limited to the above-described embodiments, but should be defined only by the appended claims. Moreover, no element and / or component in the present application examples should be construed as being essential elements or components with respect to the application unless explicitly stated otherwise.

[0104] While the embodiments of the application have been shown and described herein, it is to be understood that the application is not limited to these embodiments. Rather, many modifications, changes, substitutions, and alterations can be made thereto without departing from the spirit and scope of the application as defined by the appended claims.

Claims

1. A recirculating water breeding system for grouper simulating natural ocean currents, characterized in that, It includes the structure of the breeding pond, a biomimetic water flow stimulation subsystem, a circulating water treatment subsystem, and an intelligent control subsystem. Each subsystem is organically connected to the electrical circuit through a pipeline network to form a closed-loop circulating water breeding system. The structure of the breeding pond is used to simulate a natural spawning ground, set up feeding and resting areas for the parent fish of the red grouper, and monitor the behavior and spawning process of the parent fish of the red grouper in real time and collect fish eggs. The aquaculture pond structure includes a pond body, an observation device, and an egg collection device. The pond body includes a deep water area and a shallow water area. The deep water area is used to simulate a natural spawning ground, while the shallow water area is used for feeding and resting. A drain outlet is set at the lowest point of the center of the pond bottom. Water outlets are installed at different heights and angles on the surrounding pond walls. The observation device is an underwater camera used to monitor the behavior and spawning process of the broodstock in real time. The egg collection device is set at the front end of the drain outlet for efficient collection of fish eggs. The biomimetic water flow stimulation subsystem is used to generate a three-dimensional dynamic flow field with complex and varied spatiotemporal distribution in the aquaculture pond. The biomimetic water flow stimulation subsystem includes a three-level distributed pipe network system and a three-dimensional multi-dimensional outlet array. The three-level distributed pipe network system includes: a primary main pipe, secondary branch pipes, and tertiary terminal pipes. The primary main pipe is arranged around the bottom of the pool body wall. The secondary branch pipes branch out evenly from the primary main pipe and are radially distributed along the pool body wall to achieve regional distribution of water flow. The tertiary terminal pipes branch out from each secondary branch pipe to achieve precise water flow distribution. The three-dimensional multi-dimensional outlet array includes bottom outlets, middle outlets, upper outlets, and special function outlets. The bottom outlets are installed at the bottom of the pool body to generate rising water flow. The middle outlets are installed in the middle of the pool body wall and are set horizontally to generate lateral circulation. The upper outlets are installed on the upper part of the pool body wall to generate surface turbulent water flow. The special function outlets are added in the central deep water area of ​​the pool body to trigger spawning behavior of parent fish. The circulating water treatment subsystem is used to ensure the stability of the circulating water quality and provide a clean environment for the growth and reproduction of the broodstock of the East Star Grouper. The circulating water treatment subsystem includes a physical filtration unit, a biological purification unit, a gas exchange unit, and a sterilization and disinfection unit. The physical filtration unit is used to remove suspended solids from the water, including uneaten feed, feces, and other particulate matter. The biological purification unit is used to convert toxic and harmful substances in the water into non-toxic nitrates through the microbial community attached to the surface of the packing material. The gas exchange unit is used to remove dissolved organic matter, colloidal particles, and some harmful gases from the water, and increase the dissolved oxygen content of the water. The sterilization and disinfection unit is used to kill pathogenic microorganisms in the water and improve water quality. The intelligent control subsystem is used to achieve automated, precise control and adaptive adjustment of water flow patterns and water quality parameters; The intelligent control subsystem includes a main controller, area controllers, actuators, sensor acquisition modules, and a human-machine interface. The main controller uses an industrial-grade programmable logic controller to receive data from the sensor acquisition modules, execute preset control programs, and send control commands to the area controllers and actuators. The actuators include variable frequency pumps, electric regulating valves, and solenoid valves. The sensor acquisition modules include multi-parameter water quality sensors, flow velocity sensors, and underwater cameras. The human-machine interface is used for setting control program parameters, displaying real-time operating status, and querying historical data. The intelligent control subsystem incorporates a multi-mode flow control algorithm based on biofeedback and coupled with the reproductive cycle of the starling.

2. A method for promoting the breeding and spawning of grouper using a recirculating water system simulating natural ocean currents, applied in the grouper recirculating water breeding system simulating natural ocean currents as described in claim 1, characterized in that... Includes the following steps: S1: Start the intelligent control subsystem, perform initial self-check of the entire breeding system, regulate the water quality parameters of the aquaculture water body through the circulating water treatment subsystem, put the broodstock of East Star Grouper into the aquaculture pond structure, and start the acclimatization mode in the first week after entering the pond. S2: After domestication, the parent fish of the East Star Grouper are fed with enhanced nutrition. The intelligent control subsystem dynamically adjusts the flow rate and angle of each outlet based on the data collected by the flow rate sensor and judges the maturity of the gonads. S3: When it is determined that the broodstock of the East Star Grouper have entered a suitable spawning state, the system will be switched to the spawning induction mode. The environmental parameters will be regulated and spawning stimulation will be carried out through the intelligent control subsystem. At the same time, spawning observation and fish egg collection will be carried out. S4: After the spawning is completed, clean the physical filtration unit and biological purification unit of the circulating water treatment subsystem and the outlet of the biomimetic water flow stimulation subsystem, check the operating status of the sterilization and disinfection unit, and calibrate the sensor acquisition module.

3. The method for promoting the breeding and production of grouper using recirculating water based on simulated natural ocean currents according to claim 2, characterized in that, S1 specifically includes: The intelligent control subsystem is activated to perform an initial self-check of the entire breeding system, and to check the pipeline connection status and outlet operation of the bionic water flow stimulation subsystem. By utilizing the operating status of each treatment unit in the circulating water treatment subsystem and the acquisition accuracy of the sensor acquisition module, we can ensure that all equipment is operating normally. The intelligent control subsystem is used to test the switching effect of each water flow mode, calibrate the measurement data of the flow velocity sensor and the water quality multi-parameter sensor, and ensure that the control accuracy of the water flow parameters and water quality parameters meets the set requirements. The water quality parameters of the aquaculture water body are regulated by the circulating water treatment subsystem, and the sterilization and disinfection unit is activated to sterilize the water body. Select parent fish of the East Star Grouper, set the water temperature to 24~26℃, and place the selected parent fish into the breeding pond structure. In the first week after entering the pond, start the gonad development promotion mode of the intelligent control subsystem and adjust the water flow speed to a gentle flow to allow the parent fish of the East Star Grouper to gradually adapt to the artificially simulated water flow environment. Observe the feeding and activity of the broodstock of the East Star Grouper to ensure that they adapt to the breeding environment.

4. The method for promoting the breeding and production of grouper using recirculating water based on simulated natural ocean currents according to claim 2, characterized in that, S2 specifically includes: After domestication, the parent fish of the East Star Grouper were given nutritionally fortified feed, and the feeding time was chosen to be during a period when the water flow was relatively slow. The intelligent control subsystem activates the standard gonadal development promotion mode and dynamically adjusts the flow rate and angle of each outlet based on data collected by the flow rate sensor to ensure a uniform multidirectional flow environment inside the pool. By observing whether male fish are chasing female fish using an underwater camera, it can be determined whether the parent fish of the East Star Grouper are in their estrus period. When it is determined that the parent fish of the East Star Grouper are in estrus, it indicates that the gonads of the parent fish are developing normally, and the current water flow pattern and nutrition enhancement program should be maintained. If it is determined that the broodstock of the East Star Grouper are not in their estrus period, it indicates that the gonadal development of the broodstock is slow. In this case, the water flow speed is appropriately increased and the daily water flow stimulation time is extended through the intelligent control subsystem.

5. The method for promoting the breeding and production of grouper using recirculating water based on simulated natural ocean currents according to claim 2, characterized in that, S3 specifically includes: When it is determined that the broodstock of the East Star Grouper have entered a suitable state for spawning, the system will be switched to spawning induction mode. At the same time, the photoperiod is regulated by the intelligent control subsystem to ensure that the environmental parameters meet the egg-laying requirements of the Oriental Star Spot; The high-intensity water flow stimulation of the spawning induction mode is activated to simulate the ocean current changes at the time of spawning in the natural environment; The spawning behavior of the parent grouper is monitored in real time by an underwater camera. After spawning, the spawning induction mode is turned off and the flow is switched to a slow flow state. The fish eggs are collected through the overflow structure of the egg collection device. The collected fish eggs are screened to remove unfertilized dead eggs and impurities, and then transferred to the hatching pond for incubation.

6. The method for promoting the breeding and production of grouper using recirculating water based on simulated natural ocean currents according to claim 2, characterized in that, S4 specifically includes: After spawning, the intelligent control subsystem is switched to postpartum recovery mode to strengthen the nutritional supplementation of the broodstock of the red grouper, and the health status of the broodstock of the red grouper is observed regularly. If stress reaction or injury occurs, corresponding care measures are taken in time. Backwash the physical filtration unit and biological purification unit of the circulating water treatment subsystem to clean impurities and biofilm in the filters, check the operating status of the sterilization and disinfection unit, and replace aging filter materials and disinfection components. Clean the outlet of the biomimetic water flow stimulation subsystem, remove any attached material, and calibrate the sensor acquisition module. After maintenance is complete, the system will be put into standby mode to prepare for the next breeding cycle.

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