An Antarctic krill trawl net

Abstract

An Antarctic krill trawl fishing net is composed of an upper rope, a lower rope, a side rope, a strength rope, a wing, a net body and a fish bag. The Antarctic krill trawl fishing net is characterized in that the wing and the net body are single-deck nettings of a four-piece type symmetrical structure, the mesh of the wing is 0.24 meter, and the tension height of the wing is 24 meters; the net body is composed of a back net, a belly net and four-piece symmetrical eight-section polyethylene nettings of two side nets, and the mesh sizes of all sections of nettings are 0.16 meter, 0.12 meter, 0.10 meter, 0.08 meter, 0.08 meter, 0.08 meter, 0.04 meter and 0.02 meter from the net opening downwards sequentially; the netting tension circumference of the net opening is 256 meters, and the tension height of the net body is 79 meters; the netting of the net body shrinks in a trapezoidal shape; the middle 70-mesh positions of the back net, the belly net and the two side nets of the front end of the net body are provided with middle ropes of the upper rope, the side rope and the lower rope respectively, the length of the middle ropes is 5.6 meters, and the total length of the upper rope, the side rope and the lower rope is 56.6 meters; 5-8-mesh nettings on all sides of the back net, the belly net and the two side net nettings are used for net piece sewing.

Description

technical field [0001] The invention relates to a trawl gear in ocean fishing technology, in particular to a trawl gear for fishing Antarctic krill. Background technique [0002] Antarctic krill resources are abundant, distributed in the circum-Antarctic waters, with a resource reserve of 650-100 million tons, and it is one of the key species in the Antarctic marine ecosystem. Since the commercial development of Antarctic krill resources in the 1980s, trawling has been the main method. Due to the special geographical location and operating environment of the Antarctic krill fishery, Antarctic krill trawls are mainly single-vessel trawls. Therefore, trawl nets and mesh panels are the main tools for Antarctic krill fishing operations, and trawl nets are the most direct production tools for Antarctic krill fishing. [0003] The structure and scale of Antarctic krill trawling gear need to be reasonably matched and selected with the power of the main engine of the ship used, th...

AI Technical Summary

Problems solved by technology

However, since this type of net generally adopts a double-layer net structure, the net assembly process is complicated, and the net resistance is large, which is cumbersome in the net cleaning and repair process.

Once this type of net is damaged, it will bring a lot of trouble to repair and affect the normal fishing production

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