31 results about "Fish resources" patented technology

The invention belongs to the technical field of water ecological protection and water resource management, and particularly provides a cascade reservoir operation ecological benefit evaluation method based on a habitat model, and the method comprises the steps: collecting the topographic data of a downstream fish spawning site of a cascade reservoir, the actual measurement hydrological data of a hydrological station, and the biological data of target fishes; performing unstructured triangular mesh division on the research river reach by adopting a finite volume method, and simulating flow velocity and water depth distribution of a research area through a continuity equation and a momentum equation; according to the biological data of the target fish, a suitability curve of the flow velocity and the water depth is constructed, and the habitat suitability index HIS of each grid is calculated in combination with the flow velocity and water depth data output by the hydrodynamic module; and calculating an effective available area WUA and an overall suitability index OSI based on the HSI value for ecological benefit assessment. The method comprehensively considers the influence of the cascade reservoirs on the correlation factors, accurately evaluates the ecological benefits, and provides a scientific basis for ecological scheduling of the cascade reservoirs and fish resource protection.

This application discloses a comprehensive assessment method and system for multi-source data management and correction of watershed fish resources. The method includes: extracting multi-dimensional features from a first data matrix to obtain a first feature matrix; classifying species data based on anomaly scores, outputting verification results, and correcting the first feature matrix to obtain a second feature matrix; acquiring environmental DNA sequencing data and corresponding environmental data; obtaining a first eDNA dataset from the environmental DNA sequencing data through ecological screening; correcting the species in the first eDNA dataset to obtain a second eDNA dataset; fusing the second eDNA dataset with the second feature matrix; calculating biodiversity indices and analyzing community structure; analyzing long-term trends in population and community structure; and generating a comprehensive assessment report. This application achieves full-process automation and intelligence from data quality control and fusion to assessment, significantly improving the accuracy and efficiency of watershed fish resource assessment.

The application discloses a fish resource monitoring method and system based on sonar images and electronic equipment, and the fish resource monitoring method comprises the following steps: acquiring sonar images of a fish pond; detecting fish targets in more than two frames of the sonar images and tracking the fish targets; and determining the number of the fish targets in the fish pond according to the tracking result. Through the above steps, the fish resource monitoring method can accurately monitor the number of the fish targets in the fish pond, and does not cause adverse effects on the growth environment of the fish during the monitoring process.

A movable marine fishing device comprises a support, a fixed ring plate, a movable ring plate and a lifting table, a solar cell panel is arranged above the support, an air bag is connected to the outer side of the support, a circle of supporting ring is arranged on the outer side of the air bag, and the lower end of the solar cell panel is perpendicularly connected with the supporting ring through a stand column; the lower end face of the supporting ring is perpendicularly connected with an opening and closing ring plate, a lifting fishing table is arranged in the opening and closing ring plate, a bottom net is arranged at the bottom of the opening and closing ring plate in a surrounding mode, and a lifting system is arranged on the support and connected with the lifting fishing table. The device can be arranged in the ocean, fish resources are obtained regularly in an automatic fishing mode, fishermen only need to take the fish resources regularly, manpower and material resources are saved, and the benefits of the fishermen are increased.

The invention discloses an intelligent intermittent fishing operation management method and system based on lamplight purse seine trapping. A fish behavior spatio-temporal evolution graph is constructed by acquiring fish resource survey data of a fishing destination of a target fishing boat and fish dynamic response data after arrangement of a lamplight purse seine, future gathering tropism change of a fish school is predicted, and the actual trapping abundance and the expected trapping abundance of the lamplight purse seine are determined according to the future gathering tropism change. When the actual trapping abundance is lower than the expected trapping abundance, in combination with water body environment data and fingerling space-time distribution sequence data, identifying multi-source environment interference factors such as natural enemy interference factors and water body environment interference factors, monitoring each interference factor in real time, evaluating interference intensity change, and constructing an interference intensity change curve; and generating an intermittent fishing operation strategy of the target fishing boat. According to the invention, intelligent regulation and control of fishing operation can be realized, the trapping efficiency is improved, invalid fishing is reduced, and the application value is good.

This invention proposes a data analysis-based method and system for assessing fish resources in reservoirs, belonging to the field of resource assessment. The method includes collecting ecological characteristic data and population characteristic parameters of introduced and native fish populations in the reservoir; calculating niche overlap indices between introduced and native fish populations in both spatial and trophic dimensions, and integrating these to obtain a comprehensive niche difference index; calculating the population growth potential of each population and obtaining a fitness difference index; processing the comprehensive niche difference index and fitness difference index to obtain a coexistence stability score and determining the coexistence stability level of the two populations; acquiring time-series data of the niche overlap index, extracting fluctuation characteristic parameters, and generating a fish resource assessment report based on the fluctuation characteristic parameters and the coexistence stability level. This invention can comprehensively assess niche differences between populations.

The application discloses a water taking ecological scheduling method based on fish early resource protection and belongs to the technical field of environmental protection of water crossing engineering. The method comprises the following steps: (1) monitoring fish early resources, and acquiring fish early resource biomass distribution data of a water taking section and each water layer of an upstream and a downstream; (2) obtaining fish early resource loss amount by using multi-dimensional space-time parameter coupling loss amount analysis; optimizing water taking head design to minimize fish early resource loss amount; and (3) establishing an ecological-hydraulic coupling multi-objective optimization decision model, calculating fish early resource loss amount in real time, and screening a scheduling scheme considering ecological protection and engineering efficiency. The application solves the problem that ecological protection and engineering efficiency are difficult to be considered in traditional technology by dynamic scheduling and engineering structure innovation, and provides a scientific and quantitative solution for sustainable utilization of water resources in a basin.

The application discloses a marine economic fish resource evaluation platform based on multi-source data fusion. The platform sets a target water area layer and multi-period monitoring, uses a sonar detection device to collect data to generate first fish school characteristics, collects images through an underwater camera device and generates second fish school characteristics through a preset image recognition model; a fish school characteristic matrix is constructed based on time window analysis, noise time periods are screened by using matrix similarity discrimination; the recognition process of the noise image set is dynamically adjusted in edge segmentation parameters, and the resource evaluation of economic fish is carried out by fusing and correcting the recognition result. Through multi-source data fusion analysis, difference comparison of fish school characteristics and dynamic image parameter adjustment, the application effectively improves the comprehensiveness, reliability and accuracy of fish school characteristic evaluation in complex water environment, can provide real-time dynamic data support for fishery resource management and marine ecological protection, and has a wide application prospect.

This application discloses a simulation method, system, device, and storage medium for fish community survey sampling. The method includes: acquiring hydrodynamic environmental data and historical ecological baseline data of fish in a target sea area; determining the adaptive grid topology and fish species migration response coefficients of each monitoring unit in the target sea area based on the hydrodynamic environmental data and the historical ecological baseline data of fish; identifying the core area of ​​fish resource aggregation; constructing a multi-species coupled dynamic model of fish; generating a temporal series of the spatial distribution of community structure for each monitoring unit; fusing and constructing a multi-dimensional state temporal series of the ecosystem; generating a species diversity thermodynamic field temporal series based on the multi-dimensional state temporal series of the ecosystem and a preset uncertainty quantification algorithm, and outputting a sampling station layout scheme that prioritizes coverage of highly heterogeneous areas of the fish community. This invention improves the accuracy and efficiency of marine fish community surveys through dynamic simulation and uncertainty analysis, and can support efficient sampling station optimization.

The invention provides a water diversion engineering water intake fish early-stage resource hydraulic distribution method and device based on a water permeable barrier. The device comprises the water permeable barrier, an upper restraining structure, a lower restraining structure and a control system. The permeable barrier is formed by splicing modular curtain units, the upper portion of the permeable barrier is connected between the anchoring pier and the adjustable supporting rod through a bearing main cable, and the lower portion of the permeable barrier is fixed to the underwater ground anchor through a connecting piece. During operation, data are monitored through the water level sensor, the telescopic amount of the supporting rod and the length of the main cable are adjusted in a linkage mode, the vertical gradient of the barrier changes in a self-adaptive mode, curved surface flow guiding and rising water flow are formed, on the premise that the influence on the water taking amount of the water taking opening is reduced, hydraulic sorting and guiding conveying of fish early-stage resources are achieved, and entrainment losses are effectively reduced. The invention provides a water intake fish early-stage resource entrainment loss prevention and control technology based on a hydraulic separation and curved surface diversion principle, and provides a new technical approach for realizing fish resource protection in water diversion engineering.

The invention discloses a river-tracing spawning migration fish resource simulation analysis method based on an age structure. The method comprises the following steps: constructing population vectors in a target lake and a river; calculating the population number of lakes and rivers every year; constructing an age structure function of a population migration breeding population in the river; calculating a repeated propagation coefficient; calculating the quantity of lake supplementary populations; and updating the future lake population vector and the total resource quantity based on the lake supplementary population quantity. According to the method, through population vector construction, age structure analysis, propagation coefficient calculation, supplementary population quantification and population iteration updating, annual iteration of population quantity is realized, and population age structure change, supplementary population fluctuation and total resource quantity evolution trend of many years can be continuously tracked. Compared with a static evaluation model, the method can quantify long-term effects of measures such as reproduction protection and migration channel improvement.

The invention relates to the technical field of aquatic ecology monitoring, and discloses source branch native juvenile fish monitoring equipment which comprises a main body frame placed in a river channel, a fish collecting bin fixedly connected to the interior of the main body frame and used for collecting and temporarily containing juvenile fish in water flow, and a plurality of limiting pieces arranged on the two sides of the main body frame correspondingly and used for limiting the juvenile fish in the water flow. The main body frame is in limiting connection with a river channel through a limiting piece, the filtering and cleaning assembly comprises two filtering pieces and two cleaning pieces, an inlet and an outlet are formed in the front end and the rear end of the fish collecting bin respectively, the two filtering pieces are arranged on the inlet and the outlet respectively, the cleaning pieces are arranged on the fish collecting bin and used for cleaning the filtering pieces, and the monitoring assembly is arranged in the fish collecting bin. The fish collecting cabin is used for observing fish fries contained in the fish collecting cabin and acquiring fish collecting images. The core problems of stability, blocking resistance, image quality, automation degree and the like in field fish early resource monitoring are effectively solved, and the accuracy and continuity of monitoring data are remarkably improved.

The invention discloses a fish resource prediction method of female and male sex ratio change. The method comprises the following steps: constructing female and male gymnocypris przewalskii population vectors in a lake and a river of a target lake; calculating the population number of lakes and rivers every year; calculating the sex ratio of the gymnocypris przewalskii in lakes and rivers; calculating a repeated propagation coefficient; establishing a relationship between a river male-female ratio and a lake male-female ratio; and predicting the total resource quantity of the lake gymnocypris przewalskii in the future based on the relationship between the river male-female ratio and the lake male-female ratio and the repeated propagation coefficient. Based on the ecological habit of'lake inhabiting-river breeding 'of migratory fishes, accurate accounting of the population number is achieved by constructing the lake population vector and the river breeding population vector, the sex ratio feature, breeding coefficient and lake population cardinal number of the river breeding population are combined, the linkage logic of the population supplementation amount and the existing resource amount is more complete, and the breeding efficiency of the migratory fishes is improved. And the prediction error caused by data isolation is obviously reduced.

The application belongs to the technical field of bioengineering, and specifically discloses a single-domain antibody protein framework from freshwater stingray, which is derived from the variable region domain of heavy chain antibody IgNAR of the freshwater stingray, and the sequence composition is Leading Peptide, FR1, CDR1, FR2, HV, FR3, CDR3 and FR4 in sequence. The application uses the freshwater stingray as a research model, so that the development of the vNAR single-domain antibody technology can be free from the high threshold mode of relying on marine cartilaginous fish resources and seawater aquaculture facilities, the research and development cost of the single-domain antibody can be significantly reduced, the geographical threshold can be lowered, institutions located in non-coastal areas can also independently develop the vNAR, the development speed of the single-domain antibody technology can be improved, and the popularization and the expansion of the application radiation range of the single-domain antibody can be promoted.

The invention provides a fish resource quantity information evaluation device and system, and the device comprises a cruising main body which comprises a power part and a bearing part which are connected with each other, and the power part is used for driving the bearing part to cruise in a target water area; the trawl net is connected with the bearing part; in the advancing direction of the cruising main body, the front end of the trawl net is provided with a tour guide port for guiding fishes to swim in, and the rear end of the trawl net is provided with an escape port for allowing the fishes to escape; the image acquisition module is arranged on the bearing part; wherein the image acquisition module faces the trawl and is used for acquiring a plurality of fish images when fishes swim along the trawl, and the fish images are in approaching motion postures and water area backgrounds in the plurality of fish images. Through the device provided by the invention, the problems of poor imaging quality, weak environmental adaptability, complex operation and the like of the traditional non-invasive image acquisition equipment are solved.

The present application belongs to the technical field of fishery resource assessment, and provides a method for assessing fish population resource quantity. The method is based on multi-year daily scale fishery data and time corresponding environmental monitoring data, and differentiates the fish capture data and environmental factor data, and on this basis, an environmental response assessment model between fish population resource quantity and various environmental factors is constructed. The assessment model simultaneously reflects the linear influence and nonlinear response characteristics of environmental factors on fish population resource quantity, and the model parameters are determined using historical data, and after the parameters are determined, the fish population resource quantity of the same water area in different time periods can be continuously assessed. The method can effectively improve the stability and accuracy of fish resource quantity assessment, and is suitable for fish resource management and decision support in natural waters such as rivers, lakes and reservoirs.

This invention relates to the technical field of aquatic animal group marking, and discloses a fish scale marking method, comprising the following steps: (1) using a laser to ablate the scales of the fish to be marked, forming a marking pattern; (2) after the ablation operation, wiping the marking pattern with a reagent; the reagent, by mass fraction, includes 1-3% dye, 5-10% chitosan and 1-3% antibacterial agent, with the remainder being phosphate buffer; (3) then allowing it to stand to complete the marking. This invention, by combining laser ablation and special reagent treatment, can form a durable mark on the surface of the fish, with significant advantages such as high mark retention rate, low operating cost, and minimal impact on the fish, providing a new technical option for fisheries management and fish resource protection.

The present application relates to the technical field of fishery resources monitoring, in particular to a method suitable for big water surface group monitoring and counting of aar fish, according to the type of water area, the grid dynamic distribution of acoustic signal receiving station is carried out, the joint positioning method of more than three points based on TDOA, combined with the weighted least square method to calculate the accurate coordinate of the marked aar fish, and the behavior of the aar fish is judged, so as to master the activity area of the individual fish after the individual fish cluster through the marking of the individual fish, combined with the water depth, water temperature and water quality data, the characteristics of the fish habitat are obtained, and the fish activity range and rule are obtained. Based on the behavior habit of fish, the monitoring range is divided, the population monitoring and counting are carried out through the fish sonar scanning, the problems of big water surface fish population monitoring difficulty and fish population repeated counting are reduced, and the precision of the monitoring and counting result is improved. The scheme of the present application has the characteristics of non-damage, full coverage, high precision and standardization, and is suitable for big water surface aar fish resource investigation, evaluation of aar fish population release effect and ecological fishery management.

The present application belongs to the technical field of aquaculture and fish resource protection, and specifically provides a visual-priority experimental water target fish three-dimensional trajectory fusion tracking and monitoring method and system, which comprises: through the cooperative deployment of a fixed unit and a mobile unmanned ship, a fusion sensing unit is disposed, visual, sonar and hydrological data are collected, and space-time alignment is completed; after pretreatment, target fish features and centroid coordinates are extracted based on an improved target detection model, then cross-unit target matching is performed, and target fish speed, acceleration and attack angle motion parameters are calculated; then a multi-view visual triangulation is performed to construct a preliminary three-dimensional trajectory, a blind area and deviation are corrected through sonar and visual fusion, and after the elimination of abnormal points, a continuous final three-dimensional trajectory is generated. The present application uses a visual-priority multi-sensor fusion technology to solve the problems of low monitoring accuracy and poor trajectory continuity of a single sensor in a complex water environment, and provides high-reliability technical support for the field protection, habit research, health assessment and habitat restoration of flagship species such as Chinese sturgeon.

The invention discloses a hydroelectric engineering fish resource loss compensation evaluation method, and relates to the technical field of ecological environment protection, and the method comprises the steps: dividing a target region of hydroelectric engineering construction, deploying a multi-source image collection device, synchronously obtaining a fish image and environment parameter data including flow velocity, water temperature and dissolved oxygen, and constructing an original database; and training a fish image recognition model based on a deep learning algorithm, and performing fish type recognition and quantity statistics in multiple scenes. According to the method, the image recognition technology and the digital twinborn technology are integrated, fish images and environment parameter data are synchronously acquired, a fish image recognition model is trained in combination with a deep learning algorithm, and automatic fish type recognition and real-time quantity statistics under multiple scenes are performed, so that fishes can be quickly and accurately recognized and counted; and the change trend of fish resources can be monitored in real time, the evaluation efficiency and accuracy are remarkably improved, and a scientific basis is provided for optimization of a resource scheduling strategy of compensation measures.

The invention belongs to the field of mariculture equipment, and relates to a guide type artificial ecological fish reef for migratory fishes, which comprises a fish reef body, the fish reef body is of a hollow triangular pyramid structure with an upward conical tip, the bottom of the fish reef body is of an open structure, and the fish reef body is formed by splicing a triangular pyramid and a plurality of triangular prisms through metal connecting pieces; the three side faces of the triangular pyramid and the three side faces of each triangular pyramid frustum are each provided with a plurality of triangular hollowed-out holes, and the porosity of the side faces of the fish reef body is lower when the side faces of the fish reef body are closer to the upper layer. A plurality of supporting components used for supporting the fish reef body on the seabed are arranged at the bottom of the fish reef body. The artificial ecological fish reef adopts a triangular pyramid type structural design, combines a guiding function and an ecological function, forms a stable hydrodynamic condition in ocean current, guides migratory fish clusters, realizes artificial controllable accurate control of a demersal and migratory fish migration path, is suitable for deep and far sea water areas, aims to promote migratory fish resource recovery, and has a good application prospect. And the sustainability of fishery resource utilization is improved.

The application discloses a method suitable for creating a fish baiting field in a river, and comprises the following steps: S1, preliminary investigation; S2, selection of a location for creating the baiting field; S3, arrangement of ecological ditches; S4, bottom transformation; S5, microhabitat creation in a river bank zone: a group of submerged dams are arranged in an array on a gentle slope beach on one side or both sides of the target river section, the submerged dams are in a C shape, in the same submerged dam group, all the openings of the submerged dams are directed to the river bank close to the submerged dam group, and the adjacent two rows of the submerged dams are staggered; and S6, plant community restoration. The application has the advantages of simple structure, convenient construction, interception of local area non-point source pollution, reduction of pollution load into the river, better promotion of protection and maintenance of fish resources, and contribution to formation of a good river water ecological system.

The present invention relates to an auxiliary method and facility for fish resource recovery in an open water diversion channel, which includes: an inlet of the attraction channel arranged on a side wall of the open water diversion channel, a slope provided inside the attraction channel, wherein a lower end of the slope is located inside the open water diversion channel, and a higher end of the slope is located outside the open water diversion channel, an attracted water flow is arranged at the higher end of the slope to guide fish into the attraction channel and an outlet of the attraction channel is connected to a still water zone, wherein the still water zone is provided with a release device. The present invention effectively guides a significant number of fish that have mistakenly entered the open water diversion channel out of the channel through attracted attraction. This approach not only protects fish resources but also prevents channel blockages caused by massive fish intake, thereby avoiding power plant shutdown incidents, thus preventing substantial economic losses and, more importantly, ensures the operational safety of the power plant.

The application discloses a kind of high-moisture extruded restructured products of red meat fish based on pre-stabilized powder construction and a preparation method thereof, and belongs to the field of food processing and protein reorganization technology.The preparation of the high-moisture extruded restructured products of red meat fish based on pre-stabilized powder construction of the application is through the continuous processing technical route of "pre-stabilized rinsing-freeze-dried powderization-composite protein system construction-high-moisture extrusion organization", improves the processing performance of dark red meat fish raw materials, improves the storage stability and processing adaptability of powder raw materials, promotes the formation of continuous oriented fiber structure of composite protein system, so as to obtain dark red meat fish composite protein restructured products with high organization degree, excellent mechanical properties and good sensory quality, realizes the high-value utilization of dark red meat fish resources.

The invention discloses a fish resource monitoring method and system based on a sonar image and electronic equipment. The fish resource monitoring method comprises the following steps: acquiring the sonar image about a fish pond; detecting a fish target in more than two frames of sonar images, and tracking the fish target; and determining the number of the fish targets in the fishpond according to the tracking result. Through the above steps, the fish resource monitoring method can accurately monitor the number of fish targets in a fish pond, and does not cause adverse effects on the fish growth environment in the monitoring process.

The invention discloses a marine economic fish resource evaluation platform based on multi-source data fusion. According to the platform, a target water area layer and multi-period monitoring are set, a sonar detection device is used for collecting data to generate first fish school features, an underwater camera device is used for collecting images, and second fish school features are generated through a preset image recognition model; constructing a fish school feature matrix based on time window analysis, and discriminating and screening a noise time period by adopting matrix similarity; and carrying out dynamic adjustment of edge segmentation parameters in the recognition process of the noise image set, and fusing the corrected recognition result to carry out economic fish resource evaluation. Through multi-source data fusion analysis, difference comparison of fish school features and parameter adjustment of dynamic images, comprehensiveness, reliability and precision of fish school feature evaluation in a complex water area environment are effectively improved, real-time dynamic data support can be provided for fishery resource management and marine ecological protection, and the method has a wide application prospect.

An experimental method for low-high temperature hatching stimulation and dual-high temperature tolerance threshold determination for schizothoracine fish eggs in high diurnal temperature variation waters includes: step 1, determining daily extreme water temperatures and a daily water temperature variation during natural incubation of the schizothoracine fish eggs; step 2, implementing an incubation water temperature with the daily water temperature variation; step 3, determining a key hatching water temperature; step 4, inducing mass hatching of the schizothoracine embryos; and step 5, determining temperature tolerance thresholds. Through indoor water temperature gradient experiments on the schizothoracine fish eggs, a hatching mechanism under low-high temperature stimulation for fertilized eggs of Schizopygopsis microcephalus in Yangtze River source, and dual-high temperature tolerance ranges and thresholds. This provides scientific support for the protection and restoration of fishery resources in the Yangtze River source under the background of global warming.

The invention discloses an intelligent fishway fish passing effect monitoring device, and relates to the technical field of fish resource protection, the intelligent fishway fish passing effect monitoring device comprises a cleaning cylinder, the outer side of the cleaning cylinder is welded with a connecting arm, the bottom of the inner side of the connecting arm is provided with a bearing, the inner side of the bearing is embedded with a rotating column, and the outer side of the connecting arm is provided with a waterproof shell. The device is scientific and reasonable in structure and safe and convenient to use, the pressure pump is started, so that the spherical glass cover is flushed repeatedly, the water-proof motor is installed on the inner side of the water-proof shell, the water-proof motor is installed on the inner side of the water-proof shell, the water-proof motor is installed on the inner side of the water-proof shell, and a clamping disc is welded to one end of the rotating column, and the spherical glass cover is attached to one end of the clamping disc. At the moment, the originally dirty surface of the outer side of the spherical glass cover can be cleaned, and the outer surface of the spherical glass cover can be alternately cleaned through multiple times of washing, so that the surface, located in water, of the spherical glass cover is always clean, and it is guaranteed that a monitoring camera can shoot fish schools in a fishway clearly all the time during fish school monitoring.

The present invention discloses a fixing device for a plankton net for collecting early fish resources. Its structure includes a towing rope, a fixing mechanism, and a biological net. The towing rope is installed on the top of the fixing mechanism. Four partition rods are connected to the outside of the central cylinder in cooperation with spring tube sleeves and telescopic rods to form a "rice" - shaped structure, which can separate and block the inlet of the inlet ring, isolate mature large fish outside, avoid mature large fish being discharged into the net body, and prevent the net body from being broken; through the elastic connection of the torsion shaft and the outer support rod, the outer support rod can be elastically adjusted in angle of rotation. Through twelve outer support rods and the external contact plate, the four support rods inside the net body can be contacted. At this time, the net body is effectively撑开 to form a funnel - shaped structure, which can effectively prevent the net body from being compressed into a flat state after being subjected to water pressure when entering the water, and improve the effect of collecting early fish resources. It should be noted that there is a Chinese character "撑开" in the original text which might be a typo or an incomplete expression. I translated it as "撑开" for now, but it might need to be adjusted according to the correct Chinese content. If it's supposed to be something like "fully opened", it should be translated more accurately.

This invention belongs to the field of ecological restoration technology and discloses a shellfish-algae reef for estuarine ecological restoration and fish resource conservation. The reef is composed of layered composite structural units, vertically arranged as follows: a bottom shellfish attachment zone, a middle algae growth zone, and an upper fish habitat zone. The shellfish attachment zone has a porous microtexture of 50–200 μm; the algae growth zone contains an anchoring mesh and nutrient slow-release units; and the fish habitat zone has a tubular shelter structure and an spawning substrate. The units are made of biodegradable composite materials, and their surfaces are functionalized to form a bio-attachment induction interface. Multiple units are arranged alternately or intermittently to form a flow velocity gradient region. This invention can synergistically construct multi-trophic-level biological communities, improve habitat complexity and ecosystem stability, and is suitable for estuarines affected by diversion water and with low natural transparency, significantly enhancing the effects of estuarine ecological restoration and fish resource conservation.