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Fish anadromous migration assisting method

A technology for assisting fish migration and migration, which is applied in the field of assisting fish upstream and downstream migration, can solve the problems of unmonitored fish passing through fish passages, huge cost of fish passage construction, and high requirements on geographical conditions, so as to reduce fish stress. Reaction, stable deformation, small mesh deformation effect

Active Publication Date: 2019-04-02
EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the 1960s, more than 40 migration passages have been built in my country, such as the Tugutang fishway on the Xiangjiang River and the Cuijiaying fishway on the Hanjiang River, etc. Research on the selection and optimization of various fishways has also been carried out. However, from the data analysis, domestic Most of the fishways have been abandoned due to unsatisfactory operation. Some fishways have not been detected to have fish passing since they were built. The ecological effects are related to migratory objects, natural environment and other factors, and are not applicable to all water conservancy projects. In addition, fishway construction The cost is huge, and the requirements for geographical conditions are relatively high

Method used

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  • Fish anadromous migration assisting method
  • Fish anadromous migration assisting method
  • Fish anadromous migration assisting method

Examples

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Embodiment 1

[0038] figure 1 Shown is the device for assisting fish upstream migration of the present invention, which can be arranged multiple times on both sides of the river channel 1, such as figure 1 As shown, due to space limitations, only the left and right pairs are shown in the figure. The device comprises: a water inlet channel 2, a fish pond 3, a trapping channel 4 and an induction net wall 5.

[0039] Wherein the induced mesh wall 5 extends from the bank to the center of the river; the angle between the induced mesh wall 5 and the flow direction of the river is less than 60 degrees, preferably 30-60 degrees. Preferably, the end of the induced mesh wall 5 is bent inward into a barb shape. The corresponding induced net walls 5 on both sides of the strait form an inverted figure-eight shape, overlapping but not connected in the middle.

[0040] The trapping waterway 4 extends toward the river bank along the opposite direction of the induced net wall 5, and the upstream side of ...

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Abstract

The invention discloses a fish anadromous migration assisting method. The method includes steps: (a) arranging fish anadromous migration assisting devices along a riverway, wherein each device comprises an inducing net wall, a trap water channel, a fish gathering pond and an entry canal, and the fish gathering pond is internally provided with a fish gathering tank available for hoisting transport;(b) adding baits into each fish gathering pond, and controlling entry water flow to induce target fishes to migrate into the corresponding fish gathering tank available for hoisting transport; (c) after the target fishes enter the corresponding fish gathering tank available for hoisting transport, hoisting to transport the fishes along with water to a target water area. By integration of water flow, the fish gathering devices and the attracting functions of the baits, the target fishes can be attracted to actively gather in the fish gathering ponds, and accordingly attracting effects of the target fishes are remarkably improved, body damages of the target fishes due to fishing net extrusion are greatly reduced, and anadromous migration assisting efficiency is effectively improved while the survival rate in fish anadromous migration is effectively increased.

Description

technical field [0001] The invention belongs to the technical field of fishery facilities, and in particular relates to a method for assisting fish in upstream migration. Background technique [0002] In recent years, due to the construction of river hydropower stations and other projects, the vertical connection of rivers has been blocked, and the continuity of upstream and downstream water bodies has been blocked in geographical space, which has a great impact on the biological process of migratory fish. Reduce the negative impact of industrial facility construction on migratory fish. Since the 1960s, more than 40 migration passages have been built in my country, such as the Tugutang fishway on the Xiangjiang River and the Cuijiaying fishway on the Hanjiang River, etc. Research on the selection and optimization of various fishways has also been carried out. However, from the data analysis, domestic Most of the fishways have been abandoned due to unsatisfactory operation. S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/10
CPCA01K61/10Y02A40/81
Inventor 李灵智黄洪亮
Owner EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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