Fish anadromous migration assisting method

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...

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

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