70 results about "Fish habitat" patented technology

An artificial fish habitat (10) comprises an open framework (12) including a plurality of layers (14). The layers (14) each include an open portion (20) and are generally aligned so that the open portions (20) cooperate to define a passageway (26) through the framework (12) for fish to reside therein. Each layer (14) includes a periphery section (18) which is formed from a material presenting a minimum cross section sized and configured to be greater than the gap spacing of a conventional fish hook such that the hook may not snag on the framework (12). A method of utilizing the partially submerged habitat (10) comprises descending a hook through the passageway (26) to contact a layer (14) and withdrawing the hook without snagging.

The invention discloses a river ecological flow process derivation method for fish habitat protection, and the method specifically comprises the steps: carrying out the investigation of the current situation of fish resources in a research region, and determining a target fish obtained through the ecological flow derivation; the method comprises the following steps: carrying out targeted survey ontarget fishes, carrying out a laboratory stress experiment, screening key water environment factors, and establishing a quantitative response relationship between different life stages of the targetfishes and the key environment factors by utilizing data obtained by the laboratory and field survey; Basic data of hydrology, water quality, topography, meteorology and the like of a research area are collected, a fish habitat model is established by adopting a fuzzy mathematics principle and is coupled with a water environment model, a fish habitat evaluation system is established, and a dynamicresponse relation between the habitat and flow is obtained; and determining a reference system for river ecological flow process calculation, comprehensively considering habitat demands of target fishes at different life stages and seasonal changes of natural runoff, and deducing a complete hydrological annual ecological flow process of the river. Constraint conditions can be provided for reservoir-oriented eco-friendly scheduling, and a practical and reliable basis is provided for drainage basin water resource distribution and management.

Fish hiding units are discloses herein, which may comprise a sinkable container comprising at least one open end; a plurality of elongated and substantially flat projection members comprising a body and opposing ends inserted at one end into the open end of the container; and an adhesive substance disposed in the container for attaching the projection members inside the container.

A fish habitat which provides a habitat for fish to congregate consisting of individual strands of a buoyant material, such as polyethylene, secured to a body for installation on the bed of a body of water.

The invention discloses a fish habitat comprehensive protection system for the upper stream, down stream, main stream and branch stream of a reservoir. The fish habitat comprehensive protection system comprises a reservoir upstream main stream fish habitat protection system, a reservoir upstream branch stream fish habitat protection system, a reservoir downstream branch stream fish habitat protection system and a reservoir downstream branch stream fish habitat protection system. The reservoir upstream main stream fish habitat protection system is arranged at the position, above a reservoir dam, of a riverway main stream. The reservoir upstream branch stream fish habitat protection system is arranged at the position, above the reservoir dam, of a riverway branch stream. The reservoir downstream main stream fish habitat protection system is arranged at the position, below the reservoir dam, of the riverway main stream. The reservoir downstream branch stream fish habitat protection system is arranged at the position, below the reservoir dam, of the riverway branch stream. According to the fish habitat comprehensive protection system, the overall healthy and sustainable development need of the ecological environment of the upper stream, down stream, main stream and branch stream of the reservoir is met, the river fish habitat protection theoretic and technical study system in China is filled and perfected, and social benefits, economic benefits and environmental benefits are all achieved.

The invention provides an experimental method for determining the curve for the adaptability to the current speed of a fish habitat. The experimental method comprises the following steps: constructing a water tank provided with annular channels with the widths thereof being gradually varied, so as to form the current state of which the current speed is gradually varied in the annular channels; and observing the growth conditions of experimental fishes in the areas with different current speeds after stocking the experimental fishes, so as to construct the curve for the adaptability to the current speed of the fish habitat. The invention further provides a device for determining the curve for the adaptability to the current speed of the fish habitat. The device comprises the water tank, wherein a partitioning wall is arranged in the water tank; the extended line of the partitioning wall and the lateral edge of the water tank form a certain included angle; the partitioning wall divides the areas in the water tank into the ring-shaped channels; a power unit is mounted at one end of the annular channel; and a slot matching a moveable blocking net is formed on the wall of the water tank. The device and the method provided by the invention are capable of rapidly and accurately providing the curve for the adaptability to the current speed of the fish habitat and have the advantages of simple method steps, convenient operation and low cost.

The invention relates to an ecological type assembled shore protection composite structure. The ecological type assembled shore protection composite structure comprises a retaining wall, bottom plates, a landscape platform and a beveloid; the beveloid is made of pervious concrete and comprises a fish habitat beveloid body and a plant growing beveloid body; the fish habitat beveloid body is provided with first fish habitat holes and fiber bionic grass; the landscape platform on the plant growing beveloid body is provided with plant growing holes penetrating from the landscape platform to the bottom of the plant growing beveloid body, the plant growing holes are filled with ceramsite bags, and aquatic plants are planted on the ceramsite bags; the retaining wall comprises a fish habitat retaining wall body and a plant growing retaining wall body; the fish habitat beveloid body is arranged on the fish habitat retaining wall body, and the plant growing beveloid body is arranged on the plant growing retaining wall body; the plant growing retaining wall body is provided with communication holes; the fish habitat retaining wall body is provided with second fish habitat holes which penetrate through the fish habitat retaining wall body and communicate with the first fish habitat holes; and the fish habitat retaining wall body and the plant growing retaining wall body are connected in a splicing mode. By means of the ecological type assembled shore protection composite structure, the comprehensive functions such as dirt filtering, plant growing, landscape, shore protection and ecology are achieved.

The invention relates to a silt tidal creek fish capturing device and a sweep net device for driving tidal creek fish. The capturing device comprises rectangular nettings, a net bag, a frame line net piece, a triangular sweep net and the like. In combination with the landform feature of a tidal creek and the rising tide feature of tides, the silt tidal creek fish capturing device and a quantitative fish density sampling method are designed. By means of the method, the total density of the silt tidal creek fish can be monitored in a quantitative mode, the density of all kinds of fish can be calculated as well, and the types of the fish entering the tidal creek and the density difference in different tidal water depths can be calculated, so that searchers can know the influence mechanism of the tidal creek on the fish habitat strategy. The silt tidal creek fish capturing device and the quantitative fish density sampling method have the advantages of being easy to operate, capable of saving cost, capable of saving labor and the like and particularly suitable for quantitative monitoring of the density of the silt tidal creek fish.

The invention discloses an experimental facility for research of behaviors of fishes threatened by the water pressure. The experimental facility comprises a cylinder body, a cylinder cover, a control box, a camera A and a camera B. The control box is fixedly arranged outside the cylinder body. The camera A is fixed to the inner wall of the cylinder cover. The camera B is fixed to one side of the cylinder body. Both the camera A and the camera B are connected with a computer through image collection cards. The control box comprises an internal controller and a control panel. The cylinder body is provided with a water inlet pipe and a water outlet pipe. The water inlet pipe is provided with a solenoid valve A and an automatic boosting pump. The water outlet pipe is provided with a solenoid valve B. The cylinder body is communicated with a pressure transmitting meter. The pressure transmitting meter, the solenoid valve A and the solenoid valve B are connected with the internal controller through circuits. A heating rod and a water quality detection sensor are fixed in the cylinder body. The cylinder cover is provided with a top light. The top light, the heating rod and the water quality detection sensor are connected with the internal controller through wires. The experimental facility is simple in structure, convenient to operate and capable of achieving the research of the influence on the behaviors of the fishes of the moment when the fish habitat is changed.

The invention discloses a construction method of fish habitats in inland waterway engineering. The construction method comprises the steps that a tributary arm side ditch or a river bend backwater area communicating with a main navigation channel is adopted on a river marginal bank so as to build a habitat space suitable for inhabiting, spawning and foraging of fishes; and the regulated dam body type is adopted within the range of a regulation line of the main navigation channel to build a habitat space suitable for inhabiting, spawning and foraging of the fishes. The diversified habitats suitable for inhabiting of the fishes are constructed correspondingly in different areas in the river marginal bank and the main navigation channel through regulation engineering layout and regulated dam body structural improvement. 1, in space, the construction method can be suitable for the different areas such as the river marginal bank and the main navigation channel, and the construction requirements of the fish habitats in different river forms are met; 2, in function, the function of river ecological protection is met; and 3, ecologically, the hydrodynamic framework conditions in the main navigation channel are improved, and the diversified habitats which are in a flow state and abundant in terrain are built.

The invention discloses an ecological habit-based river fish habitat appropriate area calculation method, and the method comprises the following steps: firstly, investigating a fish resource current situation and a fish habitat current situation of a research area, and determining a habitat range and target fishes; according to the ecological habits of the target fishes and the important habitat characteristics of the habitat, selecting water depth, flow velocity and substrate as calculation indexes of the suitable area of the fish habitat; establishing a response relationship between the target fish and each key environmental factor by adopting an experiment or expert method, and constructing a single-factor suitability function for each key environmental factor; constructing a fish habitat suitability comprehensive index by adopting an arithmetic mean value method; calculating the suitable area of the fish habitat under different flow conditions by using the comprehensive indexes of the suitability of the fish habitat, and obtaining the maximum suitable area of the fish habitat and the corresponding ecological flow. On the basis of the single-factor suitability function, the arithmetic mean value method is used for calculation, and the calculation result better conforms to the actual situation.

The invention discloses a small and medium-sized ecological weir and a method for regulating and controlling a fish water flow habitat. The weir comprises a weir body, gates, gate chambers, guide rails and an intelligent control system; the functions of a biological migration channel and regulating and controlling gates are combined; the connectivity of water bodies on the upstream side and the downstream side of the weir is effectively guaranteed; and meanwhile, the effect of fish habitat communication is achieved. The regulation and control gates are arranged at the biological migration channel and at the gate chambers in a stepped mode, the discharge amount of river channel water flow is controlled in a transverse opening and closing mode, and a plurality of water permeable holes are formed in the gates so as to relieve the impact effect of the water flow on the gates and the weir. The gate chambers are arranged in the weir body, the sizes of the gate chambers are suitable for arrangement of the gates correspondingly, and guide rails are arranged at the bottom ends of the gate chambers and are used for guiding the gates to move transversely. The intelligent control system can accurately measure the water level and flow on the upstream side and the downstream side of the weir and correspondingly calculate and process the water level and flow, the opening and closing combination mode and opening degree of the gates are intelligently adjusted and controlled, and the flood discharge capacity of a river channel is effectively guaranteed.

The invention discloses a fish passing facility comparison and selection method. The method comprises the steps of: 1, collecting data; 2, determining a fish passing object; 3, determining a fish passing season; 4, analyzing habitat suitability; 5, preliminary comparison and selection of fish passing facilities: selecting two or more than two fish passing facilities from the fish passing facilitycomparison list as to-be-selected fish passing facilities; 6, determining a fish passing facility comparison, selection and scoring list; and 7, comparing and selecting the fish passing facilities again: carrying out index scoring operation on each to-be-selected fish passing facility which is preliminarily compared and selected in the step; according to the fish passing facility comparison and selection scoring list in the step 7, multiplying a scores obtained by each index scoring list by the weight coefficient of the index, to obtain a result which is the final score of the to-be-selected fish passing facility, and the to-be-selected fish passing facility with the highest final score serving as the selected fish passing facility. The selected fish passing facility is more scientific, sothat the damage of the hydraulic structure to the fish habitat is relieved.

The invention provides a settlement type artificial fish reef structure. The settlement type artificial fish reef structure comprises a cement fish reef base plate and damping pieces, wherein the cement fish reef base plate is erected on a supporting assembly, vertically-arranged mounting columns are fixedly mounted on the two sides of the cement fish reef base plate correspondingly, and a first fish sheltering piece and a second fish sheltering piece which are distributed up and down are mounted on the mounting columns; and the first fish sheltering piece and the second fish sheltering piece are the same in specification, and the damping pieces used for reducing swing of the gravity center of the cement fish shelter base plate are mounted on the second fish sheltering piece. According to the settlement type artificial fish reef structure, water flow can flow smoothly, the problem of flow choking in a seabed local water area is solved, a cement block in the fish sheltering piece is provided with criss-cross through holes and through cavities, the fluidity of the whole water flow is extremely good, besides, the shielding performance of the fish reef structure is guaranteed, the gathering effect of juvenile fishes is extremely good, and an adult fish habitat field, a fish spawning field and a juvenile fish protection breeding field are created.

The invention discloses an experiment device for research of suitable hydrologic conditions of a fish habitat. The experiment device comprises an outer wall, an energy consumption tank, a habitat experiment area, a water pump and the like, wherein the fish habitat experiment area is the core area of the model. Bottom plates of different heights are arranged in the experiment area, so that a step-type fish habitat is constructed, and contrastive analysis of different water depth conditions is achieved; each bottom plate is provided with four different types of substrates, namely grassland, bare land, gravel and cobble in sequence. According to the experiment device, focusing on the range of the suitable hydrologic conditions of a fish spawning period habitat and threshold analysis, based on the single-variable principle, in the condition that the other factor conditions are controlled to be consistent, fish upstream processes in different situations are compared, the passing condition of fish upstream and migration in each river is recorded, and the influence of water depth changes on fish migration is explored.

The invention relates to a natural water area fish spawning site identification method, and belongs to the technical field of fish ecosystem protection. According to the fish spawning site identification method, starting from an environment and organism mutual relation rule in an ecological principle, topographic factors with biological significance in a fish habitat water area are extracted by utilizing a geographic information system technology, and an accurate identification conclusion of a target water area spawning site is obtained in a weighted calculation and on-site verification mode.Different from a conventional mode that fish spawning site identification mostly depends on field investigation and field investigation, the method greatly reduces the field investigation work, and eliminates a large amount of field useless investigation through an indoor remote sensing analysis means. Meanwhile, the remote sensing analysis can conveniently realize the full coverage of the targetwater area, is more suitable for the identification of the spawning site of the large-space-scale water area, and effectively reduces the missed inspection and misjudgment of artificial field work.

The invention relates to a degenerated marsh wetland fish habitat restoration method. The technical problem that an existing marsh wetland becomes degenerated marsh without water or fish, and the ecological function of serving as transit rest land of migrating birds is lowered is solved. Accordingly, a habitat space is suitably restored, and a breeding habitat is suitably restored. For the restored marsh wetland, after a flood recedes, the number of fishes stuck in the marsh wetland is obviously increased compared with that before restoration, the increment of fish weight is 150.1%, and the increment of the number of individuals is 99.4%; a certain number of fish resources can be kept in autumn and spring for the birds to eat, and then the originally lost ecological function of serving asthe transit rest land of the migrating birds in autumn and spring is restored.

The invention discloses a fish migration channel determination method and system. The method comprises the following steps: determining water environment parameter information of a target fish habitat according to basic topographic data and hydrological data of the target fish habitat; determining a motion track of the target fish in combination with the swimming ability of the target fish, the upstream behavior characteristics and the water environment parameter information; clustering the motion trails by using a clustering analysis method, and determining a plurality of potential migration channels of the target fish; and determining the weight of each potential migration channel, and determining a final migration channel of the target fish by using a weighted average method. According to the method and the system, the considered influence factors are comprehensive and accurate, and the determined migration channel is obtained through quantitative calculation, so that the accurate fish migration channel can be quickly obtained.

The invention belongs to the technical field of river network ecological research, and particularly relates to a fish habitat protection and habitat construction method based on ecological base flow regulation and control. Habitat protection is carried out on the most important and sensitive fish spawning site in the fish habitat; By ecological flow regulation and control, blocking influence of water retaining buildings and immigrant land reclamation projects on the longitudinal and transverse connectivity of the main river is reduced to ensure the river network has enough fish habitat area; according to the requirement for the applicability of the roe habitat, the required diversified aquatic habitat is provided for fish oviposition, overwintering and bait rearing by arranging the roe gravel marginal beach, the permeable weir, the deep pool area, the log matrix and the aquatic plants.