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Article

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

by
Chenxu Shan
1,
Hao Tang
1,2,3,4,5,*,
Nyatchouba Nsangue Bruno Thierry
1,*,
Wei Liu
6,
Feng Zhang
1,
Meixi Zhu
1,
Can Zhang
1,
Liuxiong Xu
1,2,3,4,5 and
Fuxiang Hu
7
1
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China
2
National Engineering Research Center for Oceanic Fisheries, Shanghai 201306, China
3
Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture and Rural Affairs, Shanghai 201306, China
4
The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Shanghai Ocean University, Ministry of Education, Shanghai 201306, China
5
Scientific Observing and Experimental Station of Oceanic Fishery Resources, Ministry of Agriculture and Rural Affairs, Shanghai 201306, China
6
Key Laboratory of Oceanic and Polar Fisheries, Ministry of Agriculture and Rural Affairs, East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China
7
Faculty of Marine Science, Tokyo University of Marine Science and Technology, Minato, Tokyo 108-8477, Japan
*
Authors to whom correspondence should be addressed.
J. Mar. Sci. Eng. 2023, 11(10), 1972; https://doi.org/10.3390/jmse11101972
Submission received: 11 September 2023 / Revised: 7 October 2023 / Accepted: 8 October 2023 / Published: 12 October 2023
(This article belongs to the Special Issue Next-Generation Sustainable Marine Fisheries and Aquaculture Engineering)
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Abstract

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.
Keywords: netting; sinking speed; leadline weight; solidity ratio; flume tank experiment netting; sinking speed; leadline weight; solidity ratio; flume tank experiment

Share and Cite

MDPI and ACS Style

Shan, C.; Tang, H.; Thierry, N.N.B.; Liu, W.; Zhang, F.; Zhu, M.; Zhang, C.; Xu, L.; Hu, F. Sinking Behavior of Netting Panels Made with Various Twine Materials, Solidity Ratios, Knot Types, and Leadline Weights in Flume Tank. J. Mar. Sci. Eng. 2023, 11, 1972. https://doi.org/10.3390/jmse11101972

AMA Style

Shan C, Tang H, Thierry NNB, Liu W, Zhang F, Zhu M, Zhang C, Xu L, Hu F. Sinking Behavior of Netting Panels Made with Various Twine Materials, Solidity Ratios, Knot Types, and Leadline Weights in Flume Tank. Journal of Marine Science and Engineering. 2023; 11(10):1972. https://doi.org/10.3390/jmse11101972

Chicago/Turabian Style

Shan, Chenxu, Hao Tang, Nyatchouba Nsangue Bruno Thierry, Wei Liu, Feng Zhang, Meixi Zhu, Can Zhang, Liuxiong Xu, and Fuxiang Hu. 2023. "Sinking Behavior of Netting Panels Made with Various Twine Materials, Solidity Ratios, Knot Types, and Leadline Weights in Flume Tank" Journal of Marine Science and Engineering 11, no. 10: 1972. https://doi.org/10.3390/jmse11101972

APA Style

Shan, C., Tang, H., Thierry, N. N. B., Liu, W., Zhang, F., Zhu, M., Zhang, C., Xu, L., & Hu, F. (2023). Sinking Behavior of Netting Panels Made with Various Twine Materials, Solidity Ratios, Knot Types, and Leadline Weights in Flume Tank. Journal of Marine Science and Engineering, 11(10), 1972. https://doi.org/10.3390/jmse11101972

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