Ecological-balance selective fish catcher

Abstract

The invention discloses an ecological-balance selective fish catcher. The ecological-balance selective fish catcher comprises a fish net cage and a fish attracting device arranged on the fish net cage, wherein one-way fish inlets and releasing holes are formed in the side surface of the fish net cage, and an opening is formed in the top of the fish net cage; and the fish attracting device comprises bait devices and a traction device, and the traction device is used for enabling the bait devices to stretch into the opening and pulling the bait devices out of the opening. According to the ecological-balance selective fish catcher, the one-way fish inlets are formed in the side surface of the fish net cage, big fishes outside the fish net cage can easily enter the fish net cage and cannot easily exit from the fish net cage, the fishes adverse to the ecological balance of the big fishes entering the fish net cage are manually processed, and other fishes beneficial to the ecological balanceare released through the releasing holes, so that the ecological balance of the fishes in a river region can be guaranteed, the manufacturing cost is low, the mounting is simple and convenient, the fish catching efficiency is high, the operation is convenient, and the environmental pollution is avoided.

Description

technical field [0001] The invention relates to the technical field of fish farming, in particular to an ecological balance selective fish catcher. Background technique [0002] At present, some places have introduced other fishes in order to improve the ecological balance of the local river areas, but because the newly introduced fishes have no natural enemies in the local area or have reproduced in large numbers for other reasons, the local ecological balance has been destroyed instead. For example, in the 1970s, in order to improve the ecology, the United States introduced Asian carp to Arkansas. Later, due to the flood, the Asian carp occupied the surrounding waters. Since the Asian carp had no natural enemies in the local area, they grew rapidly and had strong reproductive ability. They almost ate up all the food that the local fish depended on for survival, resulting in an ecological imbalance. . [0003] However, at present, the fishing efficiency of ordinary fishin...

AI Technical Summary

Problems solved by technology

Later, due to the flood, the Asian carp occupied the surrounding waters. Since the Asian carp had no natural enemies in the local area, they grew rapidly and had strong reproductive ability. They almost ate up all the food that the local fish depended on for survival, resulting in an ecological imbalance.

[0003] However, at present, the fishing efficiency of ordinary fishing gear is low, and fishing with power grids or fish medicines cannot solve the problem of local ecological imbalance.

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