Page 14 - 《水产学报》2025年第11期

尤鑫星，等 水产学报, 2025, 49(11): 119701

Hydrodynamic characteristics of the otter board in trawling: a review

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YOU Xinxing , HU Fuxiang , HUANG Liuyi , XU Qingchang , ZHUANG Xin 4*
1. College of Fisheries, Ocean University of China, Qingdao 266003, China;
2. College of Marine Living Resource Science and Management, Shanghai Ocean University, Shanghai 201306, China;
3. State Key Laboratory of Fishery Resources and Ecosystem, Yellow Sea Fisheries Research Institute,
Chinese Academy of Fishery Sciences, Qingdao 266071, China;
4. School of Fishery, Zhejiang Ocean University, Zhoushan 316022, China

Abstract: Trawl fishery plays a crucial role in marine fisheries in China. The otter boards (or trawl doors) are important com-
ponents of fishing gear used to maintain the horizontal expansion of the trawl net mouth, ensuring fishing efficiency. Previous
studies have shown that the drag generated by otter boards accounts for approximately 20% to 30% of the total drag in a trawl
system. Developing high-performance otter boards is therefore of significant importance for enhancing fishing efficiency, redu-
cing carbon emissions, conserving energy, and promoting environmental sustainability. We have reviewed the hydrodynamic
characteristics of numerous otter boards around the globe, which include the main structural factors and their effects on the
hydrodynamic characteristics of the otter boards. Moreover, the design requirements and technical methods of otter boards
under different development concepts such as energy and labor savings and green ecology are also discussed, aiming to provide
important theoretical references for the development of high-performance otter boards in Chinese trawl fishery.

Key words: trawl fishery; otter board; hydrodynamic characteristics; energy and labor savings; eco-friendly
Corresponding author: ZHUANG Xin. E-mail: zx20190429@outlook.com
Funding projects: National Key Research and Development Program of China (2024YFD2400702); National Natural Science
Foundation of China (32202997)

中国水产学会主办 sponsored by China Society of Fisheries https://www.china-fishery.cn
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