Intelligent self-adaptive intermediate temporary rearing system and method for enhancement and release

Abstract

The invention discloses an intelligent self-adaptive intermediate temporary rearing system and method for enhancement and release, and belongs to the technical field of enhancement and release of aquatic organisms. The system comprises a modularized temporary culture box body, a dynamic layered culture unit, a multi-parameter coupling water quality regulation and control module, a natural water flow simulation device and a stress physiological regulation and control assembly. Progressive adaptation of aquatic organisms to the target water area environment in the pre-releasing stage is achieved. The method comprises an environment pre-adaptation stage and a sectional type dynamic domestication stage, and environment stress of aquatic organisms in the temporary rearing and releasing process is reduced by gradually adjusting water quality conditions, water flow modes and bait types. The system and the method are suitable for intermediate temporary rearing management before aquatic organism enhancement and release.

Description

Technical Field

[0001] This invention belongs to the field of aquatic organism propagation and release technology, specifically relating to an intelligent adaptive intermediate holding system and method for pre-release holding and environmental adaptation regulation of aquatic organisms. Background Technology

[0002] Stock enhancement is an important technical means to restore aquatic biological resources and improve the ecological structure of aquatic areas, and it has been widely used in freshwater areas, nearshore sea areas, and artificially restored water areas. During the stock enhancement process, artificially bred fish fry, shrimp fry, or other aquatic organisms usually need to go through a transitional stage from the artificial breeding environment to the natural aquatic environment. The environmental adaptation effect during this stage directly affects the survival rate and ecological adaptability after release.

[0003] In existing fish stocking operations, the intermediate holding before release typically uses cement ponds, simple holding boxes, or net cages for short-term centralized management of the holding water. While this type of holding method can achieve centralized storage of fish fry to some extent, it still relies heavily on human experience in areas such as water quality control, water flow environment simulation, and stress management, resulting in limited overall intelligence and precision.

[0004] On the one hand, existing temporary holding techniques mostly rely on artificial water changes, single filtration, or simple aeration to regulate water quality, making it difficult to respond promptly and synergistically to dynamic changes in key water quality parameters such as ammonia nitrogen, dissolved oxygen, and pH. When the temporary holding density is high or the holding time is long, uneaten feed and metabolites easily accumulate in the water, increasing the risk of water quality deterioration, which in turn induces physiological stress in fish fry and affects the temporary holding effect.

[0005] On the other hand, most existing intermediate holding devices are not designed to simulate the water flow characteristics of natural water bodies. The water flow patterns in the holding water are relatively simple, usually exhibiting still water or weak water flow in a constant direction. This water flow environment differs significantly from the slow-flowing, turbulent, and periodically changing water flows commonly found in actual release waters. As a result, fish fry cannot undergo effective swimming adaptation training during the holding period, and are prone to problems such as rapid energy depletion and insufficient adaptability when facing complex water flow conditions after release.

[0006] Furthermore, existing temporary holding methods rely heavily on empirical judgment of fish fry activity levels through manual observation, lacking quantitative assessment methods based on behavioral data. This makes it difficult to identify the stress level of fish fry in a timely and accurate manner, and also makes it difficult to dynamically adjust water quality conditions, water flow environment, or nutrient supplementation methods according to the stress state. This extensive management approach, to some extent, limits the effective regulation of the physiological state of fish fry during the temporary holding stage.

[0007] Meanwhile, during the transition from temporary holding to release, existing technologies typically involve a one-time or short-term rapid adjustment of water quality and flow conditions, causing fish fry to be directly introduced into natural waters from a relatively stable breeding or temporary holding environment. This can easily trigger strong environmental stress and reduce the overall survival rate after release.

[0008] In summary, existing intermediate holding techniques for stock enhancement still have room for improvement in terms of water quality coordination and regulation, water flow environment adaptability, and the level of intelligence in fish fry stress management. There is still a lack of a technical solution that can comprehensively regulate water quality, water flow, and fish fry stress during the holding stage and achieve gradual adaptation to the target release water environment. Summary of the Invention

[0009] In view of the problems of insufficient adaptability of aquatic organisms to environmental changes in the pre-release stage of existing stock enhancement and release processes, reliance on experience in temporary holding management, and single control dimensions, the purpose of this invention is to provide an intelligent adaptive intermediate temporary holding system and method for stock enhancement and release, which can comprehensively control the temporary holding environment of aquatic organisms in the pre-release stage, and realize the gradual adaptation of aquatic organisms to the target release water environment.

[0010] To achieve the above objectives, this invention provides the following technical solution: An intermediate temporary holding system is constructed, comprising a temporary holding support structure, a stratified aquaculture structure, a multi-parameter coupled water quality control structure, a natural water flow simulation structure, and a stress physiological regulation and behavioral feedback structure. Based on this system, corresponding intermediate temporary holding methods are employed to synergistically regulate the water quality conditions, water flow environment, and aquatic organism behavior in the temporary holding water body. The system structure, functional modules, and methodological steps of the above technical solution will be described item by item below with reference to specific embodiments.

[0011] In one possible implementation, a smart adaptive intermediate holding system for stock enhancement and release is provided, comprising: The modular temporary holding box has a conical sludge collection area at the bottom, and an electric drain valve with a flow sensor is installed at the bottom of the conical sludge collection area; A dynamic tiered aquaculture unit is set inside the modular temporary holding box, including at least two layers of independently liftable aquaculture net cages, with the mesh size of each layer of aquaculture net cages being adjustable; The multi-parameter coupled water quality control module includes a distributed sensor array, a water quality processor, and a central controller. The distributed sensor array is used to monitor multiple water quality parameters of the temporary holding water body in real time. These water quality parameters include, but are not limited to, pH value, dissolved oxygen, ammonia nitrogen, and temperature. The water quality processor is communicatively connected to the distributed sensor array and is used to treat the water quality based on the monitoring results. It includes an ultraviolet sterilization component, a composite filter media unit, a mineral intelligent addition unit, and a pH adjustment unit. The central controller is used to control the collaborative working mode of the water quality processor based on the monitoring data of the distributed sensor array. The natural water flow simulation device is installed inside the modular temporary holding tank and is used to generate various flow patterns that simulate natural water bodies. Stress physiological regulation components for reducing stress response in fish fry include a slow-release vitamin microcapsule addition unit, a three-dimensional oxygenation system, and a light intensity modulation unit based on fish fry activity status recognition.

[0012] Furthermore, the filter media used in the composite filter media unit is modified activated carbon-bioceramic composite filter media, the preparation method of which includes: mixing activated carbon and bioceramic particles at a mass ratio of 1:1.5 to 2.5, impregnating them in a modification solution containing cerium nitrate and chitosan for treatment, and then calcining them under an inert atmosphere.

[0013] Furthermore, the water quality control logic executed by the central controller includes: activating the composite filter media unit when the ammonia nitrogen concentration exceeds the first threshold; activating the ultraviolet sterilization component and the three-dimensional oxygenation system simultaneously when the ammonia nitrogen concentration continuously exceeds the first threshold or the dissolved oxygen concentration is lower than the second threshold; and controlling the intelligent mineral addition unit and / or the pH adjustment unit to adjust the water quality parameters at a preset rate according to the target biological species.

[0014] Preferably, the natural water flow simulation device includes a variable frequency water pump, a multi-directional diversion pipe and a control chip, and is capable of generating at least one of the following: a slow flow with a velocity of 0.05 to 0.1 m / s, a turbulent flow with a velocity of 0.15 to 0.3 m / s, and an intermittent tidal flow with periodic changes.

[0015] Furthermore, the light intensity adjustment unit based on fish fry activity status recognition includes a camera and an LED array, and the central controller is configured to: calculate a stress index based on the fish fry swimming trajectory collected by the camera, and adjust the light intensity of the LED array and / or control the flow rate of the natural water flow simulation device based on the stress index.

[0016] In one possible implementation, the present invention also provides a method for intermediate temporary rearing of fish released for propagation based on the above-described system, comprising the following steps: S1, Environmental pre-adaptation stage: Based on the water quality parameters of the target release area, the multi-parameter coupled water quality control module is controlled to adjust the water quality of the temporary holding water to an initial state adapted to the target area, and the initial release density is determined based on the fish fry species, body length and water flow speed. S2, Segmented Dynamic Acclimation Stage: According to the preset acclimation cycle, the water flow pattern is adjusted in stages through the natural water flow simulation device, and the water quality parameters are gradually transitioned to match the target water area through the multi-parameter coupled water quality control module, while the feed is changed simultaneously.

[0017] Preferably, the segmented dynamic acclimatization stage includes: Adaptation period: Maintain water quality parameters that differ from the cultivation environment by no more than 5%, and adopt a continuous slow flow mode; Acclimation period: The water quality parameters are brought closer to the target water parameters by 10-15% each day, and alternating turbulent and intermittent flow patterns are adopted. At the same time, natural feed is used to replace the original cultivated feed by 10-20% each day. Transition period: Adjust the key water quality parameters to be no more than 3% different from the target water area, and adopt a water flow pattern that simulates the characteristic flow velocity of the target water area, and feed the animals with natural bait or ecological compound bait.

[0018] Furthermore, it also includes an intelligent stress monitoring step: the camera collects the swimming trajectory of the fish fry and calculates the stress index. When the stress index exceeds a preset threshold, the water flow speed is automatically reduced and the release of vitamin C is increased.

[0019] Optionally, within 24 hours prior to release, pre-release adaptation steps may be performed, including: gradually lowering the temporary holding water level, and generating water pressure fluctuations that simulate the target water depth pressure through the natural flow simulation device.

[0020] Further, in step S1, the initial release density D (tails / m²) is determined according to the following formula. 3 ): ; Where L is the body length of the fish fry, V is the water flow velocity, and k is a coefficient related to the target species.

[0021] Based on the above technical solutions, the intelligent adaptive intermediate temporary holding system and method for stock enhancement and release of the present invention achieves the gradual adaptation of the temporary holding environment to the conditions of the target release water area by constructing a comprehensive temporary holding system that integrates modular temporary holding tanks, dynamic stratified aquaculture structure, multi-parameter coupled water quality control, natural water flow simulation and stress physiological regulation during the intermediate temporary holding stage.

[0022] Specifically, this invention achieves centralized collection and timely discharge of uneaten feed and metabolites during the temporary holding process through modular temporary holding tanks and their bottom sludge collection structure, reducing the risk of organic pollutant accumulation in the temporary holding water. By setting up independently liftable dynamic stratified aquaculture units, fish fry can be managed in layers according to density and growth status during the temporary holding process, effectively alleviating the spatial stress problem under high-density temporary holding conditions.

[0023] Meanwhile, this invention introduces a multi-parameter coupled water quality control module to monitor and coordinate key water quality parameters such as pH, dissolved oxygen, ammonia nitrogen, and temperature in the temporary holding water in real time. This avoids the problems of relying on manual experience and delayed water quality response in traditional temporary holding methods, enabling the temporary holding water to gradually transition to the water quality conditions of the target release area while maintaining stability, thereby reducing acute environmental stress on fish fry before and after release.

[0024] In addition, by using a natural water flow simulation device to generate different flow environments in the temporary holding water, the fish fry can gradually adapt to slow flow, turbulent flow and periodically changing water flow conditions during the temporary holding stage, thereby enhancing the swimming ability and environmental adaptability of the fish fry and avoiding physical exhaustion or reduced survival rate of the fish fry due to sudden changes in water flow conditions after being released into natural waters.

[0025] Furthermore, this invention introduces a regulatory mechanism based on the recognition of fish fry activity status through a stress physiological regulation component. This mechanism can dynamically adjust the light environment, water flow conditions, and nutrient supplementation methods according to changes in the swimming behavior of fish fry, thereby achieving proactive intervention and relief of the stress state of fish fry, improving the physiological state of fish fry, and enhancing their health level during temporary rearing.

[0026] Based on the above system structure, the intermediate temporary rearing method for stock enhancement and release proposed in this invention combines environmental pre-adaptation with segmented dynamic acclimatization, so that the water quality parameters, water flow conditions and feed types of the temporary rearing water body gradually transition to the target release water area, avoiding the strong environmental stress caused by the direct entry of fish fry from the artificial rearing environment into natural waters in traditional release methods.

[0027] In summary, this invention achieves intelligent and adaptive management of the intermediate temporary holding process by comprehensively regulating the temporary holding water environment, water flow conditions, and fish fry stress state. It effectively improves the survival rate and environmental adaptability of fish fry after temporary holding and release, and has good practical value and application prospects. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the intelligent adaptive intermediate holding system for stock enhancement and release of the present invention; Figure 2 This is a schematic diagram of the modular temporary holding box and the dynamic stratified breeding unit in this invention; Figure 3 This is a schematic diagram of the functional framework of the multi-parameter coupled water quality control module in this invention; Figure 4 This is a schematic diagram of the structure and flow regime of the natural water flow simulation device in this invention; Figure 5 This is a schematic flowchart of the intermediate temporary rearing method for stock enhancement and release according to the present invention; Figure 6 This is a flowchart of the closed-loop process for stress index feedback regulation in this invention. Detailed Implementation

[0029] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the embodiments described below are intended to illustrate the technical solutions of the present invention, and not to limit the scope of protection of the present invention.

[0030] In the specific implementation, the overall embodiment of the intelligent adaptive intermediate holding system for stock enhancement and release of the present invention will be described first from the perspective of the overall structure and functional coordination of the system. Then, focusing on the key functional modules of the holding system, the implementation methods of the modular holding tank and stratified aquaculture structure, the multi-parameter coupled water quality control module, the natural water flow simulation device, and the stress physiological regulation and behavioral feedback mechanism will be described in detail. On this basis, the implementation methods of the intermediate holding method for stock enhancement and release, as well as the pre-release adaptation and release connection methods, will be further described in conjunction with the system operation process.

[0031] By unfolding the process layer by layer from system structure to functional modules and then to methodological flow, it becomes clearer how this invention enables aquatic organisms to gradually adapt to the target aquatic environment before release through the coordinated operation of various functional modules. Those skilled in the art should understand that, without departing from the technical concept of this invention, some structural forms, parameter settings, or implementation sequences in the above specific embodiments can be adjusted or modified accordingly, and their technical effects still fall within the protection scope of this invention.

[0032] I. Description of Overall Implementation Examples In one embodiment of the present invention, an intelligent adaptive intermediate holding system for stock enhancement and release is provided for the centralized holding and environmental adaptation management of aquatic organisms before release. The system is designed holistically to address the challenges faced by aquatic organisms during the transition from artificial breeding environments to natural aquatic environments, including differences in water quality, changes in water flow conditions, and stress responses, forming an intermediate holding platform with environmental adaptive regulation capabilities.

[0033] like Figure 1As shown, from the perspective of the overall system structure, the temporary holding system in this embodiment is not a single-function device, but a comprehensive system composed of multiple functional modules. These modules operate collaboratively under a unified control logic to jointly serve the specific technical objective of "environmental adaptation before release." The system generally includes a temporary holding structure for supporting the temporary holding water body, an aquaculture structure for achieving tiered management, a water quality control structure for regulating key water parameters, a water flow simulation structure for simulating natural water flow conditions, and a stress control structure for regulating the physiological state of aquatic organisms.

[0034] In this embodiment, the temporary holding structure provides a relatively stable holding space for aquatic organisms. Through structural design and water management, it reduces the impact of uneaten feed and metabolites on water quality during the temporary holding process, creating a foundation for subsequent water quality control. Unlike traditional temporary holding ponds or simple containers, this temporary holding structure does not exist in isolation within the overall system, but rather serves as the basic carrier for the coordinated operation of various functional modules.

[0035] Furthermore, this embodiment incorporates a tiered aquaculture structure within the temporary holding structure, enabling aquatic organisms to be distributed and managed at different spatial levels during the temporary holding process. This tiered design allows for a rational allocation of holding density within a limited space, while also providing conditions for the formation of different water flow and water quality control zones within the water body. This avoids problems such as localized environmental deterioration and stress concentration under high-density temporary holding conditions.

[0036] During system operation, the multi-parameter coupled water quality control structure monitors and regulates key water quality parameters in the temporary holding water body in real time, enabling the aquatic environment to dynamically adjust according to the environmental characteristics of the target release area while maintaining overall stability. This water quality control structure does not control a single parameter independently, but rather through the coordinated regulation of multiple parameters, it gradually transitions the temporary holding water body to the environmental state of the target area during the temporary holding phase, thereby reducing the risk of aquatic organisms encountering sudden environmental changes during release.

[0037] Meanwhile, this embodiment also constructs different forms of water flow environments in the temporary holding water body through a water flow simulation structure, enabling aquatic organisms to gradually adapt to common water flow conditions in natural waters during the temporary holding stage. By introducing diverse water flow patterns during the temporary holding stage, the swimming ability and environmental adaptability of aquatic organisms can be enhanced, allowing them to better cope with the complex water flow environment in natural waters after release.

[0038] Furthermore, this embodiment introduces a stress regulation structure. By collecting and analyzing the behavioral states of aquatic organisms, the temporary holding environment is dynamically adjusted, enabling the system to respond and control based on the actual physiological reactions of the aquatic organisms. This design breaks through the traditional temporary holding method, which mainly relies on human experience and judgment, transforming the temporary holding process from passive management to proactive regulation based on behavioral feedback.

[0039] In summary, this embodiment organically combines temporary holding structures, stratified aquaculture structures, water quality control structures, water flow simulation structures, and stress control structures, and enables them to operate collaboratively under a unified control logic, thus realizing an intelligent adaptive intermediate temporary holding system for stock enhancement and release applications. This system takes pre-release environmental adaptation as its core design objective, providing an overall framework and implementation foundation for the specific structures and control methods of subsequent subsystems.

[0040] II. Implementation methods for modular temporary holding containers and tiered aquaculture structures (corresponding to...) Figure 1 , Figure 2 ) 2.1 Implementation method of modular temporary holding box In one embodiment of the present invention, the modular temporary holding tank serves as the basic supporting structure of the entire intermediate temporary holding system, used to form a relatively independent and controllable temporary holding water environment. The temporary holding tank is designed with a closed or semi-closed structure, which can reduce the interference of the external environment on the temporary holding water body while ensuring the necessary water exchange and aeration conditions, thereby improving the stability of the water environment during the temporary holding stage.

[0041] In this embodiment, the structural design of the temporary holding tank not only considers the temporary holding needs of aquatic organisms but also takes into account the needs of water management and system coordination during the temporary holding process. The internal spatial layout of the tank matches the subsequent stratified aquaculture structure, water flow simulation structure, and water quality control structure, enabling the temporary holding tank to serve as the physical basis for the collaborative operation of multiple functional modules.

[0042] Furthermore, the bottom of the temporary holding tank is equipped with a sludge collection structure for collecting uneaten feed, excrement, and other suspended or settled impurities in the water during the temporary holding process. By placing the sludge collection structure at the bottom of the tank, pollutants generated in the water are drawn to the bottom under the influence of gravity and water flow, thereby preventing pollutants from remaining suspended in the water for extended periods or spreading within the aquaculture area.

[0043] In this embodiment, the sewage collection structure is used in conjunction with the sewage discharge device, allowing for the periodic or on-demand discharge of pollutants collected at the bottom without interrupting the temporary holding process, thereby effectively reducing the organic load level in the temporarily held water. In this way, the temporary holding tank can provide a relatively "low-load" operating state for the aquatic environment at the structural level.

[0044] It is important to emphasize that the aforementioned bottom sludge collection structure is not merely for wastewater discharge, but rather serves as a crucial foundation for the coordinated operation of the entire temporary holding system. By reducing the accumulation of uneaten feed and metabolites in the water at the source, the burden on subsequent water quality control modules in handling parameters such as ammonia nitrogen and turbidity can be significantly reduced. This creates more favorable initial conditions for multi-parameter coordinated control, thereby improving the overall stability and efficiency of the system's operation.

[0045] 2.2 Implementation of Dynamic Stratified Aquaculture Units In one embodiment of the present invention, such as Figure 2 As shown, the dynamic stratified aquaculture unit is set inside the modular temporary holding tank and is used for the stratified arrangement and dynamic management of aquatic organisms during the temporary holding process. The stratified aquaculture unit includes multiple layers of aquaculture net cages, which are arranged sequentially along the height of the tank, thereby forming multiple relatively independent but interconnected aquaculture spaces within the same temporary holding tank.

[0046] In this embodiment, each layer of the aquaculture cage can be independently raised and lowered according to actual temporary holding needs, allowing different levels of aquaculture space to flexibly accommodate aquatic organisms at different growth stages or of different sizes. Through independent raising and lowering, the position of each layer of aquaculture space can be adjusted during the temporary holding process based on growth status, density changes, or management needs, without requiring a complete replacement of the temporary holding equipment.

[0047] Furthermore, the mesh size of the aquaculture cage is adjustable, allowing the mesh size to be adjusted to accommodate changes in the body size of the aquatic organisms during temporary rearing. Adjusting the mesh size effectively prevents escape or mutual compression of the organisms while ensuring water flow and exchange, thus improving the safety and adaptability of the temporary rearing process.

[0048] Through the aforementioned layered design with independent lifting and adjustable mesh, this embodiment can achieve flexible configuration of different holding densities within a limited holding space, enabling the holding system to have a higher adaptability to different species, different growth stages, or different release scales.

[0049] It should be noted that the stratified aquaculture structure is not merely a simple division of space, but rather provides a structural foundation at the system level for subsequent water flow training, water quality gradient control, and stress dispersion. Through stratification, differentiated water flow conditions and water quality environments can be created in different height areas, allowing aquatic organisms to gradually adapt to environmental changes during temporary rearing and preventing stress responses from concentrating in a single space.

[0050] Therefore, in this embodiment, the modular temporary holding tank and the dynamic stratified aquaculture unit work together to form the basic structural unit of the temporary holding system, providing stable, adjustable and coordinated structural conditions for the subsequent implementation of multi-parameter water quality control, water flow simulation and stress feedback control.

[0051] III. Implementation Method of Multi-parameter Coupled Water Quality Control Module In one embodiment of the present invention, such as Figure 3 As shown, the multi-parameter coupled water quality control module is used for real-time monitoring and coordinated adjustment of key water quality parameters in the temporary holding water body. It is an important functional module for realizing adaptive environmental control during the intermediate temporary holding stage. This module works in conjunction with the modular temporary holding tank and the dynamic stratified aquaculture structure, operating under the overall system control logic to maintain the stability of the temporary holding water body and gradually guide the water environment to transition to the conditions of the target release area.

[0052] 3.1 Implementation methods for water quality parameter collection In this embodiment, the multi-parameter coupled water quality control module includes distributed water quality parameter acquisition units for real-time monitoring of multiple key water quality parameters in the temporary holding water body. These water quality parameters include at least those closely related to the physiological state of aquatic organisms, such as pH, dissolved oxygen, ammonia nitrogen, and temperature.

[0053] The water quality parameter acquisition units can be distributed across different water layers according to the spatial structure of the temporary holding tanks and the arrangement of the stratified aquaculture units, in order to obtain water quality data that reflects the overall state of the water body and local differences. This distributed acquisition method avoids data bias caused by monitoring only in a single location, thus providing more comprehensive and accurate basic information for subsequent water quality control.

[0054] 3.2 Implementation methods of water treatment units In this embodiment, the water quality control module further includes a water quality treatment unit, used to perform targeted treatment and adjustment on the temporary holding water body after receiving the water quality parameter collection results. The water quality treatment unit includes various types of treatment components to address different water quality problems that may occur in the water body.

[0055] The system includes a sterilization component to sterilize the water and reduce the risk of pathogens during temporary holding; a filtration component to remove suspended solids and some dissolved pollutants; a mineral addition component to replenish and adjust the mineral content of the water; and a pH adjustment component to adjust the acidity or alkalinity of the water. These components do not operate simultaneously but are selectively activated based on the water's condition and control logic.

[0056] 3.3 Implementation methods for multi-parameter coordinated control In this embodiment, the multi-parameter coupled water quality control module achieves coordinated control of various water treatment components through a central control logic. The central control logic comprehensively judges the overall state of the temporary holding water body based on the distributed water quality parameter data, and triggers the operation of the corresponding water treatment components when preset conditions are met.

[0057] It should be noted that the water quality control in this embodiment is not an isolated control of a single parameter, but rather a coordinated adjustment based on the correlation between multiple parameters. For example, when the ammonia nitrogen concentration increases, the system can not only activate filtration or related treatment components, but also, in conjunction with the dissolved oxygen status, activate oxygenation or other auxiliary treatment measures, thereby avoiding secondary impacts on the water body from a single treatment method.

[0058] Through this multi-parameter coordinated regulation method, the temporary holding water body can maintain overall stability during dynamic changes, avoid chain reactions caused by rapid changes in a single parameter, and thus reduce the physiological stress risk of aquatic organisms.

[0059] 3.4 Implementation methods for integration with the overall system In this embodiment, the multi-parameter coupled water quality control module does not operate independently, but rather in synergy with the modular temporary holding tank, the dynamic stratified aquaculture unit, and the water flow simulation device. On one hand, the bottom sludge collection structure and the stratified aquaculture structure reduce the water pollution load at the structural level, providing a relatively stable operating environment for the water quality control module. On the other hand, the water quality control module provides suitable basic water conditions for water flow training and stress control by dynamically adjusting water parameters.

[0060] Therefore, the role of this water quality control module is not only to maintain the basic water quality safety of the temporary holding water body, but also to enable the environment of the temporary holding water body to be gradually adjusted according to the characteristics of the release target water area through multi-parameter coupling and coordinated control, so as to provide support for aquatic organisms to complete environmental adaptation during the temporary holding stage.

[0061] Through the above implementation methods, this embodiment realizes a multi-parameter coupled water quality control scheme for the application scenario of stock enhancement and release. This scheme breaks through the control method of traditional temporary holding technology that is mainly based on a single water quality parameter or a single treatment method, making water quality control an important part of the overall adaptive capability of the system.

[0062] IV. Implementation Method of Natural Water Flow Simulation Device In one embodiment of the present invention, such as Figure 4As shown, the natural water flow simulation device is used to construct a controllable water flow environment in the temporary holding water body, allowing aquatic organisms to gradually adapt to the water flow conditions common in natural water bodies during the intermediate temporary holding stage. This water flow simulation device works in conjunction with the modular temporary holding tank, the dynamic stratified aquaculture structure, and the multi-parameter coupled water quality control module, and is an important component for achieving environmental adaptation before release.

[0063] 4.1 Implementation methods of water flow generation structures In this embodiment, the natural water flow simulation device includes a water flow driving unit and a water flow distribution unit. The water flow driving unit provides basic water flow power, and the water flow distribution unit guides and regulates the water flow direction and flow pattern, thereby creating different forms of water flow environments in the temporary holding water body.

[0064] Through the above structural design, the water flow simulation device can generate a water flow with a certain direction and velocity distribution characteristics within the holding tank, rather than a simple circulating water or locally disturbed water flow. The water flow formation method is adapted to the spatial structure of the holding tank and the arrangement of the tiered aquaculture units, enabling the water flow to cover the main aquaculture area, thereby avoiding large areas of still water within the water body.

[0065] 4.2 Implementation methods for generating various flow states In this embodiment, the natural water flow simulation device can generate various water flow environments with different flow patterns to simulate common hydrodynamic conditions in natural water bodies. Specifically, the water flow simulation device can generate slow-flow, turbulent, and periodically changing water flow states under the action of control logic.

[0066] Among them, the slow-flow state is used to provide a relatively mild water flow environment for aquatic organisms in the early stage of temporary rearing, so as to reduce the stress response in the initial temporary rearing stage; the turbulent state is used to enhance water disturbance and water flow changes during the temporary rearing process, so that aquatic organisms can gradually adapt to more complex hydrodynamic conditions; the periodically changing water flow state is used to simulate the characteristics of water flow changes over time in natural water bodies, so that aquatic organisms can develop the ability to adapt to water flow changes during the temporary rearing stage.

[0067] By setting up the above-mentioned multiple flow patterns, the water flow simulation device can dynamically adjust the water flow environment according to the temporary holding stage and management objectives, rather than maintaining a single water flow pattern throughout the entire temporary holding process.

[0068] 4.3 Implementation methods for water flow regulation and system linkage In this embodiment, the operation of the natural water flow simulation device is uniformly managed by the central control logic and can be adjusted according to the temporary holding stage, water quality status, and feedback from aquatic organism behavior. When the temporary holding water body is in a stable stage, the water flow simulation device can maintain a relatively stable water flow state; when it is necessary to conduct water flow adaptation training for aquatic organisms, the water flow complexity can be increased or the water flow mode can be switched.

[0069] It should be noted that water flow regulation is not carried out independently, but rather in conjunction with the water quality control module and the stress control module. For example, when the water flow intensity changes, the system can simultaneously regulate the aquatic environment in conjunction with changes in water quality parameters, thereby avoiding water quality fluctuations or the superposition of physiological stress caused by changes in water flow.

[0070] In this embodiment, the purpose of setting up the natural water flow simulation device is not only to improve water flow or water quality exchange, but also to serve as an important means of environmental adaptation training before release. By introducing a controllable and diversified water flow environment during the intermediate holding stage, aquatic organisms can gradually adapt to the complex and variable hydrodynamic conditions in natural waters before release.

[0071] This design approach, which uses water flow simulation as an independent control dimension and combines it with water quality control and behavioral feedback, enables aquatic organisms to transition from a static to a dynamic environment during the temporary holding phase, thus avoiding strong stress responses caused by sudden changes in water flow conditions after release.

[0072] Therefore, in this embodiment, the natural water flow simulation device does not exist as an additional structure, but together with the multi-parameter coupled water quality control module, it constitutes the core control system of the temporary holding system, thereby improving the adaptability of the intermediate temporary holding stage to the post-release environment from the system level.

[0073] V. Implementation Methods of Stress Physiological Regulation and Behavioral Feedback (corresponding) Figure 1 , Figure 3 ) In one embodiment of the present invention, the stress physiological regulation and behavioral feedback module is used to dynamically regulate the physiological state of aquatic organisms during the intermediate holding stage, so as to reduce the stress response during the holding and pre-release stages and improve the adaptability of aquatic organisms to the holding environment and the target release water environment. This module, together with the multi-parameter coupled water quality control module and the natural water flow simulation device, forms an adaptive control system for the holding system.

[0074] 5.1 Implementation methods for behavior data collection and stress identification In this embodiment, the stress physiological regulation module includes a behavior acquisition unit, used to acquire information on the activity status of aquatic organisms during temporary holding. The behavior acquisition unit continuously or periodically acquires information on the swimming trajectory, activity frequency, and population distribution of aquatic organisms in the temporary holding water body through image acquisition.

[0075] Based on the collected behavioral data, the system analyzes the activity status of aquatic organisms to identify their physiological stress levels. By comprehensively judging characteristics such as changes in swimming speed, abnormal activity patterns, or alterations in group behavior, behavioral indicators reflecting the stress levels of aquatic organisms can be obtained. These behavioral indicators serve as important input signals for system regulation, triggering subsequent environmental control actions.

[0076] It should be noted that in this embodiment, stress recognition does not rely on a single behavioral feature, but is based on the comprehensive analysis results of multi-dimensional behavioral features, thereby improving the accuracy of stress recognition and avoiding misjudgment caused by individual abnormal behaviors.

[0077] 5.2 Implementation methods for stress physiological regulation In this embodiment, the stress physiological regulation module dynamically adjusts relevant regulatory parameters in the temporary holding environment based on the behavior recognition results. Specifically, when the system determines that aquatic organisms are in a state of heightened stress, it can alleviate their physiological state through various regulatory means.

[0078] On the one hand, the system can adjust the light intensity or light variation of the holding water through light environment regulation, so that aquatic organisms are in a relatively stable and comfortable light environment, thereby reducing the impact of external stimuli. On the other hand, the system can also supplement the holding water with nutrients related to stress resistance through nutrient supplementation, so as to improve the physiological state of aquatic organisms.

[0079] In addition, the stress control module can also be linked with the water flow simulation device to adjust the water flow intensity or water flow pattern, and reduce the water flow complexity or change frequency when necessary, so as to avoid aquatic organisms from bearing additional hydrodynamic loads under high stress.

[0080] 5.3 Implementation methods for closed-loop behavioral feedback control In this embodiment, stress physiological regulation and behavioral feedback are not unidirectional processes, but rather constitute a closed-loop regulation system. Specifically, the behavioral state of aquatic organisms is first collected and analyzed as input signals. Based on the analysis results, the system adjusts the temporary holding environment, and the adjusted environmental changes further affect the behavioral state of aquatic organisms, forming a continuous feedback loop.

[0081] Through this closed-loop control method, the system can dynamically adjust its control strategy based on the actual physiological responses of aquatic organisms, rather than relying on preset fixed parameters or human experience. This control mechanism, centered on behavioral feedback, enables the temporary holding process to be adaptive, maintaining optimal control effects under different temporary holding conditions and biological states.

[0082] It is important to emphasize that this behavioral feedback closed-loop control method does not exist in isolation, but rather forms a synergistic relationship with water quality control and water flow simulation. When behavioral feedback indicates changes in the stress level of aquatic organisms, the system can comprehensively adjust water quality parameters, water flow environment, and light environment, enabling multiple control dimensions to work simultaneously and reducing stress risk at the system level.

[0083] 5.4 Creative Summary: From Passive Management to Behavior-Driven Regulation In this embodiment, by introducing a stress-induced physiological regulation and behavioral feedback module, the temporary care system has transformed from a traditional passive management model to a behavior-driven regulation model. The system no longer relies solely on manual observation or a single environmental parameter to determine the state of aquatic organisms; instead, it actively senses the physiological responses of aquatic organisms through continuous collection and analysis of behavioral data and dynamically adjusts accordingly.

[0084] This design approach, which uses the behavioral state of aquatic organisms as the trigger for regulation, makes the management of the intermediate holding phase more precise and intelligent, providing an important guarantee for aquatic organisms to complete environmental adaptation before release. Simultaneously, the coordinated operation of this module with the water quality control module and the water flow simulation device constitutes a multi-dimensional, adaptive holding regulation system, further improving the overall holding effect.

[0085] VI. Examples of Intermediate Temporary Holding Methods for Stock Enhancement and Release In one embodiment of the present invention, a method for intermediate temporary holding of aquatic organisms before release is provided based on the aforementioned intelligent adaptive intermediate holding system. This method is used for the centralized temporary holding and environmental adaptation management of aquatic organisms before release. By comprehensively regulating the water quality conditions, water flow environment, and biological behavior of the temporary holding water body, the aquatic organisms gradually adapt to the environmental characteristics of the target release area.

[0086] like Figure 5 As shown, the intermediate temporary rearing method includes an environmental pre-adaptation stage and a segmented dynamic acclimatization stage. Each stage is implemented sequentially under the unified control logic of the system and is dynamically adjusted according to the actual state of the aquatic organisms.

[0087] 6.1 Implementation Examples of the Environment Pre-adaptation Phase In this embodiment, the environmental pre-adaptation stage is used to initially adjust the environment of the temporary holding water body when aquatic organisms enter the intermediate holding system, so that the overall conditions are reasonably different from those of the target release area, thereby avoiding sudden stress reactions of aquatic organisms when they enter the holding system.

[0088] Specifically, in this stage, key water quality parameters in the temporary holding water body are set and adjusted based on the water quality parameters of the target release area, so that the temporary holding water body forms an initial state suitable for the temporary survival of aquatic organisms and facilitates subsequent transition. At the same time, the initial stocking density is determined according to the species, individual size of aquatic organisms and the water flow conditions in the temporary holding water body, so that the aquatic organisms are in a relatively stable population state when they enter the temporary holding system.

[0089] During the environmental pre-adaptation stage, the water flow environment in the temporary holding water body is mainly a relatively mild flow state to reduce the intensity of environmental stimulation in the initial stage, so that aquatic organisms can gradually adapt to the temporary holding environment and lay the foundation for the subsequent acclimatization stage.

[0090] 6.2 Examples of Segmented Dynamic Domestication Stages In this embodiment, the segmented dynamic acclimatization stage is used to gradually train aquatic organisms in the environment during temporary holding, enabling them to adapt to the target release water environment within the temporary holding period. This stage is divided into multiple sub-stages according to a preset acclimatization cycle, with each sub-stage corresponding to different control objectives and environmental conditions.

[0091] During the initial adaptation phase of temporary rearing, the system maintains water quality parameters in the temporary rearing water body that are relatively similar to those in the cultivation environment, and adopts a relatively stable water flow pattern, allowing aquatic organisms to adapt to the spatial structure and basic environment of the temporary rearing system under low stress conditions.

[0092] In the subsequent acclimatization phase, the system gradually adjusts the water quality parameters of the temporary holding water body according to a preset strategy, bringing them closer to the parameter range of the target release area. Simultaneously, it introduces more varied water flow patterns to enhance the aquatic organisms' adaptability to the hydrodynamic environment. During this phase, the type of feed can also be gradually changed to allow the aquatic organisms to gradually adapt their nutrient intake methods to the natural conditions after release.

[0093] During the transitional phase in the later stages of domestication, the key water quality parameters of the temporary holding water body are further approximated to the conditions of the target release area, while the water flow environment simulates the typical flow characteristics of the target area. This allows aquatic organisms to complete pre-adaptation training to the release environment within the temporary holding system, thereby reducing the adverse effects of sudden environmental changes after release.

[0094] 6.3 Methods and Implementation Strategies for Behavioral Feedback Participation In this embodiment, the implementation of the above stages is not mechanically executed according to fixed parameters, but dynamically adjusted in conjunction with the behavioral state of aquatic organisms. During the temporary holding process, the activity status information of aquatic organisms is continuously collected to determine their stress level. When the system detects an increasing trend of stress in aquatic organisms, appropriate adjustments can be made to the water flow conditions, water quality regulation rhythm, or nutrient supplementation method.

[0095] By incorporating behavioral feedback into the temporary holding method, the temporary holding process becomes adaptive, enabling management strategies to be dynamically adjusted based on the actual physiological responses of aquatic organisms, thereby avoiding adverse effects on aquatic organisms caused by excessively rapid or drastic environmental changes.

[0096] It is important to emphasize that, in this embodiment, the intermediate holding method for stock enhancement and release does not exist independently of the system structure. Instead, it relies on the coordinated operation of modular holding tanks, dynamic stratified aquaculture structures, multi-parameter coupled water quality control modules, natural water flow simulation devices, and stress physiological regulation modules. Each method step corresponds one-to-one with a system functional module, enabling the holding method to be executed stably and efficiently with system support.

[0097] Therefore, this method is not only a set of operating procedures, but also an environmental adaptation management approach based on system synergy, enabling aquatic organisms to complete comprehensive adaptation to water quality, water flow and physiological state during the temporary holding stage, providing a good foundation for subsequent stock enhancement and release.

[0098] VII. Implementation Methods for Pre-Release Adaptation and Release Coordination In one embodiment of the present invention, after completing the above-mentioned environmental pre-adaptation stage and segmented dynamic acclimatization stage, the system further enters the pre-release adaptation and release connection stage to ensure that aquatic organisms can enter the target release water area with a stable physiological state and high environmental adaptability before release.

[0099] 7.1 Implementation methods for the pre-release acclimatization stage In this embodiment, the pre-release adaptation phase is set within a predetermined time period before the actual release operation, and is used to conduct the final stage of environmental transition adjustment for aquatic organisms. During this phase, the temporary holding system continues to operate, but the control strategy gradually changes from "training-style domestication" to "close alignment with release conditions".

[0100] Specifically, during the pre-release acclimatization phase, the water level in the temporary holding water body is gradually adjusted to allow aquatic organisms to adapt to changes in the aquatic space, thus avoiding stress responses caused by sudden changes in water level during release. Simultaneously, the water quality parameters in the temporary holding water body are further aligned with the actual parameters of the target release area, ensuring that the aquatic organisms are in a highly similar aquatic environment to the target area before release.

[0101] During this stage, the water flow simulation device can adjust the water flow state in the temporary holding water body according to the water depth and hydrodynamic characteristics of the target release area, so that aquatic organisms can adapt to the changes in water flow conditions that they may face after release in advance within the temporary holding system.

[0102] 7.2 Implementation methods for the release connection process In this embodiment, the release process does not involve releasing aquatic organisms from the temporary holding system all at once, but rather it is implemented in a manner coordinated with the operating status of the temporary holding system. During the release operation, the system maintains a stable operating state of the temporary holding water body, avoiding drastic disturbance to the temporary holding environment during the release operation, thereby reducing the risk of instantaneous stress to aquatic organisms.

[0103] Release operations can be conducted in batches or at different times, depending on the conditions of the target water area and the actual release needs, to maintain a relatively stable community structure of aquatic organisms during the release process. This method avoids overcrowding or sudden environmental changes caused by concentrated releases, thereby improving the survival rate in the initial stages of release.

[0104] 7.3 Implementation Method for Release Guarantee under System Collaboration It should be emphasized that, in this embodiment, the pre-release adaptation and release connection are not independent operation steps, but are implemented by relying on the coordinated operation of the aforementioned modular temporary holding tank, dynamic stratified aquaculture structure, multi-parameter coupled water quality control module, natural water flow simulation device and stress physiological control module.

[0105] During the pre-release adaptation phase, the water quality control module, water flow simulation device, and stress control module remain operational, maintaining the physiological stability of aquatic organisms through multi-dimensional regulation. During the release process, the system adjusts the water flow conditions or other environmental parameters appropriately based on changes in the behavioral state of aquatic organisms to avoid triggering new stress responses due to the release operation.

[0106] Through the above-described collaborative implementation methods, the release operation is no longer an independent process separated from the temporary holding management, but rather a natural extension of the overall operation process of the intermediate temporary holding system, thus achieving a smooth transition from temporary holding management to actual release.

[0107] 7.4 Overall Description of the Release Example Through the aforementioned pre-release adaptation and release coordination methods, this embodiment achieves a continuous transition process for aquatic organisms from an artificial cultivation environment, through an intermediate holding system, to their eventual release into natural waters. This process, conducted under overall system regulation and behavioral feedback, effectively reduces the adverse effects of abrupt environmental changes before and after release on aquatic organisms.

[0108] Therefore, the pre-release adaptation and release connection method described in this embodiment, together with the aforementioned intermediate temporary holding system and temporary holding method, constitutes a complete propagation and release implementation plan, so that the intermediate temporary holding stage plays a key connecting role in the entire propagation and release process.

[0109] VIII. Application Examples like Figure 6 As shown below, the following describes how the multi-parameter control, behavior recognition and feedback response mechanism of the present invention can be used to intelligently manage the temporary holding process of aquatic organisms, and further verify the technical effect and system advantages of the present invention, based on a practical application scenario of the system of the present invention.

[0110] To further illustrate the intelligent adaptive control capability of this invention, specific examples are presented to demonstrate how to implement an adaptive regulation process based on the behavior state of fish fry in practical applications, highlighting the collaborative logic between the various modules of the system.

[0111] This embodiment is in Figures 1-5 Based on the system architecture shown, the following configuration and parameters are adopted: 1. System Configuration Sensor array: Deployed in the upper, middle, and lower water layers of the temporary holding tank to monitor dissolved oxygen (DO) and ammonia nitrogen (NH4) respectively. + pH, temperature; Behavior acquisition unit: Cameras are installed on both sides of the tank to capture the swimming trajectory of the fish fry in real time, with an image sampling frequency of 20fps; Stress Index Model: Based on the average swimming speed change rate of fish fry (ΔV), group concentration (density index C), and frequency of sudden swimming events (S), the stress index EI is calculated as follows: ; α, β, and γ are empirical weights, which are pre-calibrated based on different fish species.

[0112] To adapt to different fish species, growth stages, and ecological behavioral characteristics, this invention provides the following weighting parameter setting ranges as a basis for parameter adjustment during engineering implementation: α∈[0.3,0.6]: Used to highlight the sensitive response of swimming speed changes under stress, applicable to active species; β∈[0.2,0.4]: Reflects the change in population concentration during stress response, applicable to fish fry that swim in groups; γ∈[0.1,0.3]: Used to identify sudden, violent swimming behavior, applicable to startled and sensitive species; Each parameter can be fine-tuned based on experimental data, fish species characteristics, and environmental conditions, and optimized through fitting historical behavioral data. For the same system deployment scenario, a preset parameter library can be established, and corresponding weight templates can be selected before deployment to improve recognition accuracy and control effectiveness.

[0113] 2. Adaptive Response Process When the system reached the third day of the "segmented acclimatization period," the environmental water quality had been adjusted to be close to the target water area (difference less than 10%), and the fish fry entered a turbulent flow + alternating feeding stage. The system detected: The ammonia nitrogen concentration rose to 0.7 mg / L (exceeding the preset safety threshold of 0.5 mg / L). Fish fry EI > 1.0 (corresponding to moderate stress level); The camera footage showed the fish dispersing and their swimming speed decreasing significantly.

[0114] At this time, the system automatically performs the following control actions: (1) Start the composite filter unit and oxygenation system; (2) Reduce the LED light intensity to 60% of the original level to reduce light stimulation; (3) Adjust the water flow simulation device to "slow flow mode" and reduce the flow velocity to 0.06 m / s; (4) Synchronously activate the vitamin microcapsule replenishment module to release microcapsule particles containing vitamin C and E.

[0115] 3. Effect Observation Fifteen minutes later, the EI dropped to 0.62, the swimming speed of the fry returned to the normal range, the group tended to concentrate, and the system continued to enter the next stage of domestication.

[0116] This embodiment illustrates the system of the present invention: A closed-loop control chain of behavior perception → stress recognition → multi-module regulation → feedback verification; The system regulation not only relies on environmental parameters (such as pH / DO), but also integrates the identification of the subjective state of the fish fry as the core basis for control; Each module (lighting, water quality, feed, and water flow) does not operate in isolation, but rather is coordinated and regulated based on a comprehensive stress index, demonstrating a "nonlinear control synergy mechanism".

[0117] This mode is significantly different from the existing intermediate temporary storage methods that are controlled by human experience or static sensor parameters. It has advantages such as intelligence, self-adaptation, and real-time response, demonstrating the significant technological progress and creativity of this invention.

[0118] In summary, this invention constructs an intelligent adaptive intermediate temporary holding system that integrates modular temporary holding structure, dynamic stratified aquaculture structure, multi-parameter coupled water quality control, natural water flow simulation, and stress physiological regulation and behavioral feedback. It also proposes corresponding intermediate temporary holding methods, thereby enabling aquatic organisms to gradually adapt to the target water environment before release.

[0119] Through the coordinated operation of various functional modules of the system and the dynamic regulation based on the behavioral state of aquatic organisms, the temporary holding process is transformed from a traditional experience-based management model into a comprehensive regulation process with adaptive capabilities. This effectively reduces the environmental stress risk in the temporary holding and pre-release stages, and improves the environmental adaptability of aquatic organisms and the stability of the release implementation.

[0120] Therefore, the system and method described in this invention are applicable to various aquatic organism propagation and release applications, and have good practical value and promotion significance.

[0121] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

[0122] Any equivalent substitutions, modifications, or improvements made within the scope of the technical concept and principles of this invention, based on the specification and claims of this invention, shall fall within the protection scope of this invention.

Claims

1. A smart adaptive intermediate holding system for stock enhancement and release, characterized in that, include: The modular temporary holding box has a conical sludge collection area at the bottom, and an electric drain valve with a flow sensor is installed at the bottom of the conical sludge collection area; A dynamic tiered aquaculture unit is set inside the modular temporary holding box, including at least two layers of independently liftable aquaculture net cages, with the mesh size of each layer of aquaculture net cages being adjustable; The multi-parameter coupled water quality control module includes: A distributed sensor array is used to monitor multiple water quality parameters of a temporary holding water body in real time, including but not limited to pH value, dissolved oxygen, ammonia nitrogen, and temperature. A water quality processor, which is communicatively connected to the distributed sensor array, is used to treat water quality based on monitoring results. It includes an ultraviolet sterilization component, a composite filter media unit, a mineral intelligent addition unit, and a pH adjustment unit. The central controller is used to control the collaborative working mode of the water quality processor based on the monitoring data of the distributed sensor array. The natural water flow simulation device is installed inside the modular temporary holding tank and is used to generate various flow patterns that simulate natural water bodies. Stress physiological regulation components for reducing stress response in fish fry include a slow-release vitamin microcapsule addition unit, a three-dimensional oxygenation system, and a light intensity modulation unit based on fish fry activity status recognition.

2. The system according to claim 1, characterized in that, The composite filter media unit uses modified activated carbon-bioceramic composite filter media, which is prepared by mixing activated carbon and bioceramic particles at a mass ratio of 1:1.5 to 2.5, impregnating them in a modified solution containing cerium nitrate and chitosan, and then calcining them under an inert atmosphere.

3. The system according to claim 1 or 2, characterized in that, The water quality control logic executed by the central controller includes: When the ammonia nitrogen concentration exceeds the first threshold, the composite filter unit is activated; When the ammonia nitrogen concentration continuously exceeds the first threshold or the dissolved oxygen concentration is lower than the second threshold, the ultraviolet sterilization component and the three-dimensional oxygenation system are activated simultaneously. Based on the target biological species, the intelligent mineral addition unit and / or the pH adjustment unit are controlled to adjust the water quality parameters at a preset rate.

4. The system according to claim 1, characterized in that, The natural water flow simulation device includes a variable frequency water pump, a multi-directional diversion pipe, and a control chip, and is capable of generating at least one of the following: a slow flow with a velocity of 0.05 to 0.1 m / s, a turbulent flow with a velocity of 0.15 to 0.3 m / s, and an intermittent tidal flow with periodic variations.

5. The system according to claim 1, characterized in that, The light intensity adjustment unit based on fish fry activity status recognition includes a camera and an LED array, and the central controller is configured as follows: The stress index is calculated based on the swimming trajectory of the fish fry captured by the camera, and the light intensity of the LED array and / or the flow rate of the natural water flow simulation device are adjusted based on the stress index.

6. A method for intermediate temporary rearing of fish released for propagation based on the system described in any one of claims 1 to 5, characterized in that, Includes the following steps: S1, Environment Pre-Adaptation Phase: Based on the water quality parameters of the target release area, the multi-parameter coupled water quality control module is controlled to adjust the water quality of the temporary holding water to an initial state that is compatible with the target area, and the initial release density is determined based on the fish fry species, body length and water flow speed. S2, Segmented Dynamic Domestication Stage: According to the preset acclimatization cycle, the water flow pattern is adjusted in stages through the natural water flow simulation device, and the water quality parameters are gradually transitioned to match the target water area through the multi-parameter coupled water quality control module, while the feed is changed simultaneously.

7. The method according to claim 6, characterized in that, The segmented dynamic acclimatization phase includes: Adaptation period: Maintain water quality parameters that differ from the cultivation environment by no more than 5%, and adopt a continuous slow flow mode; Acclimation period: The water quality parameters are brought closer to the target water parameters by 10-15% each day, and alternating turbulent and intermittent flow patterns are adopted. At the same time, natural feed is used to replace the original cultivated feed by 10-20% each day. Transition period: Adjust the key water quality parameters to be no more than 3% different from the target water area, and adopt a water flow pattern that simulates the characteristic flow velocity of the target water area, and feed the animals with natural bait or ecological compound bait.

8. The method according to claim 6 or 7, characterized in that, It also includes intelligent stress monitoring steps: The system captures the swimming trajectory of fish fry using a camera and calculates the stress index. When the stress index exceeds a preset threshold, it automatically reduces the water flow speed and increases the release of vitamin C.

9. The method according to claim 6, characterized in that, Within 24 hours prior to release, pre-release acclimatization procedures should be implemented, including: The temporary holding water level is gradually lowered, and water pressure fluctuations that simulate the target water depth pressure are generated through the natural water flow simulation device.

10. The method according to claim 6, Its features are, In step S1, the initial release density D (tails / m²) is determined according to the following formula. 3 ): ； Where L is the length of the fish fry (cm), V is the water flow velocity (m / s), and k is a coefficient related to the target species.

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