Reducing catch efficiency of rabbitfish (Siganus oramin) in a shrimp beam trawl fishery of the South China Sea
文献类型： 外文期刊
作者： Yang, Bingzhong 1 ; Herrmann, Bent 3 ; Cheng, Zhaohai 6 ;
作者机构： 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou 510300, Peoples R China
2.Minist Agr & Rural Affairs, Key Lab Open Sea Fishery Dev, Guangzhou 510300, Peoples R China
3.SINTEF Ocean, Fishing Gear Technol, Willemoesvej 2, DK-9850 Hirtshals, Denmark
4.Univ Tromso, N-9037 Tromso, Norway
5.Tech Univ Denmark, DTU Aqua, Hirtshals, Denmark
6.Wuhan Univ Technol, Sch Resources & Environm Engn, 122 Luoshi Rd, Wuhan, Hubei, Peoples R China
7.Hubei Polytech Univ, Sch Environm Sci & Engn, 16 Guilinbei Rd, Huangshi, Hubei, Peoples R China
关键词： Catch efficiency; Codend; Greasyback shrimp; Metapenaeus ensis; Bycatch; Reduction; Rabbitfish; Siganus oramin
期刊名称：REGIONAL STUDIES IN MARINE SCIENCE （ 影响因子：1.624； 五年影响因子：1.962 ）
ISSN： 2352-4855
年卷期： 2021 年 47 卷
页码：
收录情况： SCI
摘要： The bycatch of unwanted fish species is a main concern in shrimp beam trawl fishery of the South China Sea. This study evaluated the effect of using combined square-mesh and diamond-mesh codends (CSDM codends) on catch efficiency of a shrimp trawl fishery with the catch comparison and catch ratio approach. The trouser trawl method was applied using the commercial 22-mm diamond mesh codend (D22) as the baseline. The target species, greasyback shrimp (Metapenaeus ensis), and main fish bycatch rabbitfish (Siganus oramin) were chosen as the referred species. The results demonstrated that there was no significant change for the target species but a significant reduction on the unwanted fish bycatch when the CSDM codends were used. Compared with the D22 codend, the CSDM codends would reduce the catch efficiency of greasyback shrimp by less than 18% on average, and the reduction was not statistically significant; whereas catch efficiency of rabbitfish would be significantly reduced by more than 45% and the reduction was length-dependent. The results also showed that the catch efficiency of fish bycatch would reduce as the mesh sizes of the diamond-section of the tested codends increased. These promising results demonstrate that the CSDM codends have a potential to be applied to fishery management for mitigating fish bycatch in the shrimp fishery of the studied area. (C) 2021 Elsevier B.V. All rights reserved.
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