Zhejiang Marine Fisheries Research Institute/Scientific Observing and Experimental Station of Fishery Resources for Key Fishing Grounds, Ministry of Agriculture and Rural Affairs/Key Laboratory of Sustainable Utilization of Technology Research for Fishery Resources of Zhejiang Province, Zhoushan 316021, Zhejiang, China.
Marine and Fishery Institute of Zhejiang Ocean University, Zhou-shan 316021, Zhejiang, China.
Ying Yong Sheng Tai Xue Bao. 2023 Jan;34(1):242-248. doi: 10.13287/j.1001-9332.202301.037.
is an economically valuable species in the East China Sea, whose allowable capture size varies with fishing effort in different years. To clarify the optimum capture size for in the East China Sea, we collected samples and data from targeting fishing gears such as trawls, canvas spreader stow nets and longlines from 2016 to 2020. We estimated growth and mortality parameters using the FiSAT II software, and calculated the size limit standards for capture. The results showed that the inflection point of anal length, the critical anal length and the anal length of one-year-old was 382.84, 397.12, and 216.05 mm, respectively. The anal length of maturity was 230.38 mm, and the minimum capture size (anal length) was 219.23 mm. Based on the yield per recruitment analysis using Beverton-Holt model, the current fishery reference points were under overfishing condition (=0.38 a, =2.11), and the suggested optimum capture size was 364.64 mm. There would be a sharp decline of catches in the East China Sea if the suggested minimum capture size was substantially higher, which might be non-practical for local fishermen. Therefore, we suggested 220 mm as the capture size limit, which was close to the anal length of one-year-old fish and the anal length of maturity.
是东海具有经济价值的物种之一，其可允许捕捞大小因不同年份的捕捞努力而异。为了明确东海 的最佳捕捞大小，我们于 2016 年至 2020 年期间，从拖网、帆布散布式刺网和延绳钓等捕捞渔具中收集了针对 的样本和数据。我们使用 FiSAT II 软件估计了生长和死亡率参数，并计算了捕捞的尺寸限制标准。结果表明，肛长拐点、关键肛长和 1 龄鱼肛长分别为 382.84、397.12 和 216.05 毫米。成熟肛长为 230.38 毫米，最小捕捞尺寸（肛长）为 219.23 毫米。基于贝弗顿-霍尔特模型的渔获量与补充量分析，当前渔业参考点处于过度捕捞状态（=0.38 a，=2.11），建议的最佳捕捞尺寸为 364.64 毫米。如果建议的最小捕捞尺寸大幅提高，东海的 将大幅减少，这对当地渔民来说可能不切实际。因此，我们建议将 220 毫米作为捕捞尺寸限制，这接近 1 龄鱼的肛长和成熟肛长。
