Large-area shallow-sea grading trapping device with purse seine

Abstract

The invention discloses a large-area shallow-sea grading trapping device with a purse seine. The device comprises a main net, supporting piles are arranged around the main net, and sleeving rings arearranged at the upper edge of the main net; a lifting cable is connected to one end of each sleeving ring, the sleeving rings penetrate through the interiors of meshes of the main net, multiple floating bodies are arranged on the portions, at the two sides of each lifting cable, of the main net, and a supporting cable is arranged at the end, opposite to the corresponding lifting cable, on each sleeving ring; the main net comprises multiple grading fish passing nets, the grading fish passing nets are gathered at a part of the interior, limit cables are arranged on the part, and multiple liftingdevices are arranged on the supporting piles. The large-area shallow-sea grading trapping device with the purse seine has the advantages that grading trapping of shallow-sea catching is completed bythe grading fish passing nets, and the trapping efficiency is improved; through self-rotation of the main net, fish schools enter the net by themselves, the survival rate of fish individuals in the fish schools is high, and the economic benefit is high; large fishes can be prevented from blocking the meshes, and the efficiency of grading a fishing net is improved; when the lifting cables are lifted, mesh openings of the main net are reduced, the fishes in the net are prevented from escaping, and the trapping efficiency is high.

Description

technical field [0001] The invention relates to the technical field of facility fishing engineering, in particular to a large-area shallow sea seine grading trapping device. Background technique [0002] At present, the seine aquaculture project urgently needs to focus on the development of a new type of support pile-type seine aquaculture engineering structure, so that it has high safety performance, is suitable for large-area purse aquaculture in shallow seas, and can greatly save costs. [0003] Shallow sea seine culture has a large area, no nets at the bottom, and the culture environment is closer to the natural ecology, but the feeding and catching methods of farmed fish are different from traditional cage culture, near-shore seine culture and marine fishing, so it is necessary to Carry out research and development of special trapping facilities for shallow water seine farming, including sound and light trapping technology, fish reef trapping technology, dark net trappi...

AI Technical Summary

Problems solved by technology

[0007] The present invention overcomes the deficiency of the existing trapping devices for the low catch efficiency of purse seine fishing in shallow seas, and provides a large-area shallow sea purse seine classification trapping device, which can complete large-area encirclement and fishing in shallow seas, and can trap in stages with high trapping efficiency

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