A gravity-expanding Antarctic krill truss trawling gear

Abstract

The invention relates to a gravity expansion type Antarctic krill truss rod trawling fishing gear, which includes a net gear. 18-20 meters, the diameter of the truss is between 250-300mm, the truss expands the net mouth horizontally, the mesh size of the cover net and the mesh size of the side net are both 200mm, and the cover net consists of four equilateral triangles The net is composed of a net and a piece of rectangular net; the body net has ten sections, and the facing surface of the net from the first section to the third section of the body net adopts an inverted trapezoidal structure, and the two sections of the first section of the body net The waist length is equal to the length of the upper side of the first section of the body net, the length of the lower side of the first section of the body net is less than the length of the upper side of the first section of the body net, the fourth section of the body net to the tenth section of the body net The net clothes are four pieces of symmetrical structure, and its facing surface is a square structure; the two sides of the front end of the net mouth of the body net are respectively equipped with sinking force, the weight of the sinking force is 2-3 tons, and the component force of the sinking force passes through the side The guide and suture edge conduction, so that the lower edge of the guide is in a tensioned state.

Description

technical field [0001] The invention relates to a trawl gear for marine fishery, especially a trawl gear for fishing Antarctic krill. Background technique [0002] Since the commercial development of Antarctic krill resources in the 1980s, although various operation methods such as trawling, purse seine and purse seine have been tried, after years of production practice, only one fishing operation method of trawling has been retained at present. [0003] According to the expansion method of Antarctic krill trawling fishing gear, there are mainly two types: one is to maintain the horizontal expansion of the net gear through the trawl net plate; the other is to maintain the level of the net gear through the truss rod at the front end of the net mouth expansion. The net plate trawling fishing operation method, because the net plate needs to be stable under certain dynamic conditions, so the acquisition of each catch needs to be realized through a complete process of setting th...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of low fishing efficiency and unstable operation performance of Antarctic krill trawling in the prior art

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