关键词: 大网目；拖网；渔具性能；网目结构

Abstract:

It is an important part for fishing technology innovation to adopt large-size mesh substitutes to replace traditional small mesh in the trawl fisheries and to improve the performance of fishing gear. Enlarging the mesh size and improving mesh structure could reduce drag and increase vertical expansion of mesh opening, which has been widely used in production. And the applied research on trawl with large size mesh has gained valuable conclusion and great production efficiency. However, because of lacking fundamental research, fishing material and technology was still backward, and trawl design theory was inadequate in our country, the independent design and manufacture of large trawl fishing gear has not yet been implemented. This paper briefly reviewed the progress in applied research on trawls with large mesh in China from mesh size, mesh structure, fishing materials and basis of design theory, etc., expecting to provide references for upgrading the fishing techniques.

Key words: large-size mesh；trawl；fishing gear performance；mesh structure