Antarctic krill trawl dual-selectivity device structure

Abstract

The invention relates to an antarctic krill trawl dual-selectivity device structure. The structure comprises an antarctic krill trawl; the antarctic krill trawl comprises a cover net, a side wing netand a body net; a mammal release device is arranged between the rear portion of a first section of the back of the cover net and the front portion of a first section of the body net; the mammal release device is a trapezoidal mesh; the trapezoidal mesh is interconnected with the periphery of a net opening; the body net is provided with ten sections, a ninth section of the body net is of a duct type selection device structure, a duct type induction mesh is arranged at the front end of the ninth section of the body net, and the length of the front end of the duct type selection device structureis consistent with the mesh tensioning length of a netting at the front end of the ninth section of the body net; a netting on the rear side part of the duct type induction mesh is cut upwards in a unilateral manner until the tail end of the duct type induction mesh is connected with the back joint of the front end of a tenth section of the body net, so as to form a closed state; and the middle ofthe netting of the duct type induction mesh and a side netting of the duct type induction mesh are sewn and fixed to form an obliquely upward contractive duct.

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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