基于数据有限的方法,对日本鱼 (Scomber japonicus) 的生命史特征和库存状况进行估计
Yu-Fei Zhou1,2,3, Jia-Yi Deng1, Qiu-Yun Ma1,2,3
1College of Marine Science, Shanghai Ocean University, Shanghai 201306, China.
Ying yong sheng tai xue bao = The journal of applied ecology
|September 8, 2023
概括
数据有限的方法对于了解东中国海的Chub (Scomber japonicus) 是至关重要的. 尽管种群状况良好,但捕捞量缩小需要将捕捞叉长度延长到20厘米,以实现可持续的渔业管理.
科学领域:
- 渔业 科学 渔业 科学
- 人口动态 人口动态
- 海洋生物学 海洋生物学
背景情况:
- 对于东中国海的传统渔业物种,年龄结构数据往往无法获得.
- 数据有限的方法对于评估商业鱼种群至关重要.
- 鱼 (Scomber japonicus) 是江南部海域的主要经济物种.
研究的目的:
- 使用数据有限方法估计Chub鱼的生命史特征和死亡系数.
- 使用每招募收益率 (YPR) 模型评估Chub鱼当前库存状况.
- 为Chub鱼资源的可持续管理提供建议.
主要方法:
- 使用叉长数据 (2016-2020) 估计生长参数 (L∞,K,t0) 和死亡系数 (M,F).
- 应用每招聘收益率 (YPR) 模型来评估库存状况并确定生物参考点 (F0.1,Fmax).
- 敏感性分析以评估自然死亡率 (M) 对YPR和参考点的影响.
主要成果:
- 长度与重量的关系是W=4.18×10−3L3·28. 估计的参数包括L∞=28.34厘米,K=0.36 a−1,M=0.85 a−1和F=0.82 a−1.
- 据YPR模型显示,目前的渔业死亡率 (F) 低于F0.1 (0.97a-1) 和Fmax (4.55a-1),这表明库存状况良好.
- 捕捞小型化正在加剧,目前的捕捞叉长度为15.44厘米 (1.78年).
结论:
- 南江近海的Chub鱼种群目前状况良好.
- 然而,捕捞量下降的趋势需要管理干预.
- 建议将捕获叉长度延长到20厘米,以改善捕获质量并确保可持续的资源利用.
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