8 results about "Fish habitat" patented technology

This invention discloses a method for creating fish habitats based on swarming effects, belonging to the fields of fish ecological engineering and water conservancy engineering. Existing technologies for creating fish habitats suffer from incomplete quantification of swarming behavior and a lack of quantitative correlation with engineering design parameters, leading to habitats that are difficult to match the needs of fish swarming. This invention quantifies spatial aggregation, movement synchronization, and turbulent adaptability, calculates a comprehensive swarming index and a group spatial demand coefficient, establishes a direct conversion model between swarming behavior indicators and habitat design parameters, and determines flow field control methods and structural layout methods based on the comprehensive swarming index and the group spatial demand coefficient, thereby creating fish habitats. This invention can comprehensively characterize swarming behavior, scientifically guide engineering design, and improve habitat applicability and utilization.

The utility model discloses a rice fish comprehensive breed field fish class habitat sheltering device, concretely relates to aquaculture technical field, including sheltering shell, and the both ends of sheltering shell are connected with the habitat shell, and one habitat shell top fixedly connected with sunshading board, and the bottom of another habitat shell is fixedly connected with connecting plate, and the one side of sheltering shell and habitat shell is equipped with the entrance, and the other side of sheltering shell and habitat shell is equipped with the export, and the inside of sheltering shell and two habitat shells are fixedly connected with a plurality of baffle, and the inside of sheltering shell and habitat shell is penetrated with the feeding pipe. The utility model discloses through setting up feeding subassembly and installing mechanism, can combine feeding with oxygen -enrichment, can carry out oxygen -enrichment simultaneously in the feeding process, and sufficient water dissolved oxygen content helps fish to keep active feeding state, and simultaneously through the spiral effect of spiral blade can increase the contact area of field soil, help to keep the good stability of sheltering shell and two habitat shells in the use process.

The utility model provides a kind of fish nest row component of air-permeable grating, including frame structure, the frame structure is provided with baffle, the baffle is separated into multiple hollow chambers by fish nest row frame body;The frame structure is provided with at least two first through holes in the direction of water flow, the baffle is provided with second through hole in the direction of water flow, the first through hole of the upstream frame structure is equipped with hole-plugging structure, when water flow is big, it can be washed away and the silt in chamber by hole-plugging structure being washed off, by being equipped with first through hole on frame structure, second through hole is set on baffle, hole-plugging structure is set in first through hole, when water flow is relatively small, hole-plugging structure and frame structure form a closed buffer area, it is favorable for fish habitat, when water flow impact force is greater than torsional spring elastic force, water flow can wash away hole-plugging structure, so that the silt in the inside of frame structure is taken away.

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 application provides a method for improving fish habitat environment by increasing diatom attachment growth, comprising the following processing steps: S1, placing a carrier as an attachment medium in water; S2, adding a heteropolysaccharide substance on the carrier; S3, after adding the heteropolysaccharide substance for 10-50 days, a biofilm appears on the carrier, and the biofilm contains abundant algal attachment. The application promotes the attachment growth of diatoms, green algae and other sinking algae on the surface of the carrier by placing the carrier with a bearing surface in water and adding a heteropolysaccharide substance, and by controlling the light receiving depth, attachment area and heteropolysaccharide concentration of the carrier in water. The method promotes the attachment growth of diatoms and other algae by using the heteropolysaccharide and nutrient salts in water, realizes the absorption and utilization of nutrient salts such as nitrogen and phosphorus in water, obtains attached algae such as diatoms, and achieves the purpose of improving the fish habitat environment. The application is suitable for different water environments such as seawater, freshwater and brackish water.

This invention discloses a multi-objective optimization method for fish habitat restoration projects based on reservoir scheduling constraints. It relates to the field of habitat restoration technology and addresses the technical problems of existing technologies, such as poor climate adaptability, reliance on experience, unsustainability in mountainous rivers, conflicts with reservoir scheduling, insufficient connectivity, difficulty in ensuring long-term restoration effects, and difficulty in significantly improving the accuracy of fish habitat restoration while ensuring the safe and efficient operation of reservoirs. The method employs CMIP6 climate downscaling hydrological prediction, embedding rigid constraints of reservoir scheduling, quantitative modeling of habitat suitability, collaborative evaluation of vertical and horizontal connectivity, dynamic coupling of sediment-landform habitats, and the NSGA-III algorithm for solving multi-objective optimization and closed-loop monitoring and evaluation. Combining the ecological habits of target fish species, such as temperature orientation, migration, reproduction, and foraging, a habitat hydraulic index-habitat suitability response model is constructed to assess the impact of key factors such as flow velocity, water depth, water level, and water temperature on the habitat.

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.