Influence of Material with Medium and High Molecular Weight Replacing Polyethylene on Trawl Performance

Yongli Liu,Ai Zhong Zhou,Jiangao Shi,Lu Min Wang,Lei Wang,Wen Wen Yu

doi:10.1051/matecconf/201712803008

Abstract

Taking single-boat trawling fishing in West Africa as the research object and maintaining the breaking strength of the original netting gear as the standard, we used medium- and high-molecular-weight materials to replace common polyethylene material in producing the trawl model. Test results showed that, under the same test conditions, the resistance of medium- and high-molecular-weight material trawls decreased by 16.80% compared with that of most of the common polyethylene material trawls. The maximum difference in the height of the net opening between the two material trawls was approximately 2.3 m. The energy consumption coefficient decreased by 23.65%.

Highlights

Marine fishing–trawling boats in China account for 18% of all marine fishing power-driven vessels, 25% of total power, and 48% of marine fishing yield [1] of the country
Trawl fishing is significant in marine fishing in China
The energy-saving and cost-reducing properties of netting gear are mainly evaluated based on overall resistance, height of net opening, energy consumption coefficient, power consumption [2,3,4], and other aspects

Summary

Introduction

Marine fishing–trawling boats in China account for 18% of all marine fishing power-driven vessels, 25% of total power, and 48% of marine fishing yield [1] of the country. Trawl fishing is significant in marine fishing in China. The energy-saving and cost-reducing properties of netting gear are mainly evaluated based on overall resistance, height of net opening, energy consumption coefficient, power consumption [2,3,4], and other aspects. Braided twines and other materials have been widely applied in trawl fishing abroad [5,6,7,8,9]. The overall resistance, height of net opening, energy consumption coefficient, and power consumption of the two materials were compared to provide references for relevant studies on trawl fishing gear that promotes energy saving and cost reduction

Materials and methods

Results and analysis

Power consumption normally applied to the simulated part of the netting gear