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Sinking Behavior of Netting Panels Made with Various Twine Materials, Solidity Ratios, Knot Types, and Leadline Weights in Flume Tank

文献类型： 外文期刊

作者： Shan, Chenxu 1 ; Tang, Hao 1 ; Thierry, Nyatchouba Nsangue Bruno 1 ; Liu, Wei 6 ; Zhang, Feng 1 ; Zhu, Meixi 1 ; Zhang, Can 1 ; Xu, Liuxiong 1 ; Hu, Fuxiang 7 ;

作者机构： 1.Shanghai Ocean Univ, Coll Marine Sci, Shanghai 201306, Peoples R China

2.Natl Engn Res Ctr Ocean Fisheries, Shanghai 201306, Peoples R China

3.Minist Agr & Rural Affairs, Key Lab Ocean Fisheries Explorat, Shanghai 201306, Peoples R China

4.Shanghai Ocean Univ, Key Lab Sustainable Exploitat Ocean Fisheries Reso, Minist Educ, Shanghai 201306, Peoples R China

5.Minist Agr & Rural Affairs, Sci Observing & Expt Stn Ocean Fishery Resources, Shanghai 201306, Peoples R China

6.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Key Lab Ocean & Polar Fisheries, Minist Agr & Rural Affairs, Shanghai 200090, Peoples R China

7.Tokyo Univ Marine Sci & Technol, Fac Marine Sci, Minato, Tokyo 1088477, Japan

关键词： netting; sinking speed; leadline weight; solidity ratio; flume tank experiment

期刊名称：JOURNAL OF MARINE SCIENCE AND ENGINEERING （ 影响因子：2.9； 五年影响因子：2.9 ）

ISSN：

年卷期： 2023 年 11 卷 10 期

页码：

收录情况： SCI

摘要： Netting is an important component of fishing gear design, and its ability to sink determines the effectiveness of fishing gears such as purse seines, falling nets, and stick-held nets. Therefore, it is crucial to thoroughly investigate the sinking parameters (sinking depth and sinking speed) of the netting panel as a function of the leadline weights using various twine materials, knot types, and solidity ratios. In this study, a generalized additive model (GAM) was utilized to analyze the impact of each factor on the sinking performances of the netting. The results revealed that the sinking depth of the netting was positively correlated with sinking time and leadline weight. However, the netting featured a maximum sinking depth limit, indicating that the sinking depth would not increase beyond a leadline weight of 69.5 g. During the initial phase of the sinking process, the sinking velocity of each netting panel initially increased but gradually decreased over time. The incorporation of a leadline weight reduced sinking time. Thereby, polyester netting exhibited the shortest average sinking time. A comparison of netting types with similar solidity ratios showed that the maximum sinking depth of the nylon netting was 13.20% and 10.11% greater than that of polyethylene and polyester nettings, respectively. In addition, nylon nets' time average sinking speed was 64.58% and 4.62% greater than that of polyethylene and polyester nettings, respectively. The analysis of the GAM model clearly showed that the leadline weight has a significant effect on the netting sinking speed and depth. To ensure that the netting can reach its maximum sinking speed, it is strongly recommended to use nylon and polyester nettings with a low solidity ratio, i.e., a lower twine diameter and greater mesh size with a higher leadline weight, when constructing fishing gear such as purse seines with higher net leadline weights.

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