Conduit type euphausia superba trawl net selective device

Abstract

The invention relates to a conduit type euphausia superba trawl net selective device. The conduit type euphausia superba trawl net selective device comprises an euphausia superba trawl net, wherein the euphausia superba trawl net comprises a truss, an upper edge line, a lower edge line, a side line, a cover net, a side wing net and a body net; the body net is provided with ten sections; the ninthsection of the body net adopts a conduit type selective device structure; a conduit type induction net sheet is arranged at the front end of the ninth section of the body net; the length of the frontend of the conduit type selective device structure is consistent with the tensioning length of a net mesh of a net coat at the front end of the ninth section of the body net; a net coat at the rear side part of the conduit type induction net sheet is cut upwards in a single-edge manner until the tail end of the conduit type induction net sheet is connected with a back combined part of the front end of the tenth section of the body net to form a closed state; a back net coat of the conduit type induction net sheet and an abdomen net coat of the conduit type induction net sheet are symmetricallycut and retracted in two edges, so that one third of the number of the net meshes is remained in the middle of the net coat of the conduit type induction net sheet; and the middle of the net coat ofthe conduit type induction net sheet and a side net coat of the conduit type induction net sheet are sewed and fixed to form a retractable conduit which is inclined upwards.

Description

technical field [0001] The invention relates to a selective device for trawl fishing gear in marine fishery, in particular to a selective device for trawl fishing gear for fishing Antarctic krill. Background technique [0002] The polar region is a strategic new frontier that integrates politics, economy, law and security with high international attention. The Antarctic continent is surrounded by vast oceans. The Antarctic Treaty and its environmental protection protocol freeze the territorial sovereignty claims and mineral mining activities of the seven countries. Only biological resources can be developed and utilized. Antarctic krill is one of the key species in the Antarctic marine ecosystem. It is rich in resources and distributed around the Antarctic. The resource reserve reaches 650-100 million tons. It is an important strategic resource that is currently concerned by countries all over the world. In order to promote the sustainable development of my country's Antarc...

AI Technical Summary

Problems solved by technology

Due to the rigid structure of the device, the degree of fusion with the net gear is low, making it difficult to operate the trawling net, and it has been seldom used at present.

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