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渔业研究 ›› 2022, Vol. 44 ›› Issue (3): 235-241.DOI: 10.14012/j.cnki.fjsc.2022.03.005

• 论文与报告 • 上一篇    下一篇

闽东海区桁杆张网网囊网目尺寸对带鱼的选择性研究

庄之栋,刘勇,马超,徐春燕,蔡建堤,沈长春   

  1. 1.福建省水产研究所,福建 厦门 361013 2.福建省海洋生物增养殖与高值化利用重点实验室,福建 厦门 361013

  • 收稿日期:2022-03-18 修回日期:2022-04-11 出版日期:2022-06-25 发布日期:2022-07-01
  • 作者简介:庄之栋(1986-),男,研究实习员,硕士,主要从事渔业资源和渔具渔法等方面研究. E- mail:342540286@qq.com
  • 基金资助:
    福建省省属公益类科研院所基本科研专项(2019R1013-3);2021年福建省海洋与渔业结构调整专项(2021HYJG05)

Selectivity of different mesh size codends of two-stick swingnet for Trichiurus lepturus in Eastern Fujian sea waters

  • Received:2022-03-18 Revised:2022-04-11 Online:2022-06-25 Published:2022-07-01

摘要: 为探求闽东海区桁杆张网不同网目尺寸网囊对带鱼(Trichiurus lepturus)的选择性,于2019年秋季对25 mm、35 mm、45 mm和55 mm四种不同网目尺寸网囊采用套网法开展试验,运用Logistic模型,结合极大似然法,拟合带鱼的选择性曲线并估算模型参数。结果表明:带鱼的50%选择肛长L0.5总体上随网囊网目尺寸的增大而逐渐增大,说明增大网目尺寸能够有效释放带鱼;带鱼50%选择肛长与网目尺寸(m)的关系为L_0.5=1.877m+45.323(R^2=0.712);随着网目尺寸的增大,带鱼的重量逃逸率和尾数逃逸率总体也呈增大趋势,皆在60%以上。

关键词: 闽东海区, 桁杆张网, 带鱼, 选择性

Abstract: In order to explore the selectivity of different mesh size codends of two-stick swingnet for Trichiurus lepturus in Eastern Fujian sea waters, 4 mesh sizes (25, 35, 45 and 55 mm) codends were compared using covered net method in the autumn of 2019. The Logistic model was used to fit the selectivity curve of T. lepturus and the model parameters were estimated by maximum likelihood method. The results showed that: The L0.5 of T. lepturus increased with the increase of mesh size, indicating that the increase of mesh size can effectively release T. lepturus. The relationship between the L0.5 of T. lepturus and mesh size (m) was L0.5=1.877m+45.323 (R2=0.712). With the increase of mesh size, the weight escape rate and number escape rate of T. lepturus also increased, both of which were above 60%.

Key words: Eastern Fujian sea waters, two-stick swingnet, hairtail, selectivity

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