Population dynamics and exploitation status of largehead hairtail (Trichiurus japonicus) in the Northern South China Sea

文献类型： 外文期刊

第一作者： Liu, Zikai

作者： Liu, Zikai;Li, Jiajun;Su, Li;Cai, Yancong;Zhang, Kui;Chen, Zuozhi;Liu, Zikai;Li, Jiajun;Su, Li;Cai, Yancong;Zhang, Kui;Chen, Zuozhi;Li, Jiajun;Su, Li;Cai, Yancong;Zhang, Kui;Chen, Zuozhi

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关键词： Data-limited methods; Largehead hairtail; Biomass level; Stock assessment; Spawning potential ratio; Overfishing

期刊名称：REGIONAL STUDIES IN MARINE SCIENCE （ 影响因子：2.4； 五年影响因子：2.4 ）

ISSN： 2352-4855

年卷期： 2025 年 89 卷

页码：

收录情况： SCI

摘要： For over 40 years, largehead hairtail Trichiurus japonicus have been the most economically significant fish in China. However, limited research on this species has occurred in the South China Sea, rendering the exploitation status of this resource in this region uncertain. We evaluate population dynamics and the status of largehead hairtail in the northern South China Sea to inform sustainable fisheries management. Using long-term data during 1981-2023, we apply three data-limited assessment methods: Length-Based Bayesian Biomass Estimation (LBB), Length-Based Spawning Potential Ratio (LBSPR), and the Monte Carlo Catch-Maximum Sustainable Yieldtype model (CMSY). The LBB analysis indicates that B/BMSY was 0.49 in 1981-1982, dropped to 0.11 in 2006-2007, and reached 0.35 in 2023. LBSPR results reveal an SPR value of 0.30 in 1981-1982, stabilizing at 0.03 from 1998-2020, and slightly increasing to 0.05 from 2021-2023. The CMSY model estimates a B/BMSY of 0.99 for 2023. All three assessment models consistently reveal the largehead hairtail population to have experienced overfishing. Various management measures have reduced overfishing in recent years, and these actions have positively impacted largehead hairtail stocks. However, further management is necessary to ensure largehead hairtail stock sustainability.

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