Selective catch separating device for trawl

Abstract

The invention discloses a selective catch separating device for a trawl. The selective catch separating device comprises a bottom net bag arranged at the sealed and of the trawl and separating net pieces. The separating net pieces are located in a trawl cavity of the trawl and detachably connected to a trawl body. The mesh size of each separating net piece is larger than that of the trawl body. Elastic anti-escape close-up barrier strips are arranged on meshes of each separating net piece. According to the selective catch separating device, the trawl is divided into different containing spaces through the separating net pieces, catches are automatically separated according to types and enter the different containing spaces when caught in the trawl by means of different stress responses of different marine organisms, the elastic anti-escape close-up barrier strips are used for preventing the separated catches from escaping and being mixed again, the separated catches enter the different containing spaces, as a result, primary separation can be conducted on the catches, a lot of manpower and labor hours are saved in a later sorting procedure, and therefore the production cost is reduced.

Description

technical field [0001] The invention relates to a fishing tool for marine aquatic products, more specifically, it relates to a selective catch separation device for trawl nets. Background technique [0002] Trawling is an important operation method in my country's fishery production. The trawling operation area is large and the catch is large. Therefore, the marine organisms caught in the sea area where the trawling passes are collected in one net regardless of their type and size. The process of sorting and storing fish catches requires a lot of labor and hours, which will increase operating costs, slow down the rhythm of catch circulation and market, and affect profits. If the preliminary classification of marine organisms can be carried out while fishing, the labor and man-hours for final sorting of catches can be greatly reduced. The invention with the publication number CN101209037A disclosed an adjustable trawl fish and shrimp separation device on July 2, 2008, which i...

AI Technical Summary

Problems solved by technology

Its feature is that it can separate fish and shrimp reasonably and efficiently, and better protect fishery resources; the scales on the upper and lower bottom frames make it easy to adjust the grid spacing accurately and conveniently, and the operation is simple, and there is no need to frequently replace the fish and shrimp separation device, greatly improving Save operating costs and labor, but the function of the grid in the device to prevent fish and shrimp from migrating and escaping is difficult to prevent the separated fish and shrimp from remixing

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