海洋渔业2025，Vol.47Issue(5)：662-670,9.
基于平行实验法的合规网目对小黄鱼和带鱼的选择性研究
On the selectivity of compliant mesh for Larimichthys polyactis and Trichiurus lepturus based on parallel test method
摘要
Abstract
In order to evaluate the"coverage effect"on the test results and the selectivity of compliant mesh size in the selectivity test of canvas spreader stow net,the selectivity experiment of compliant mesh for Larimichthys polyactis and Trichiurus lepturus was conducted in October 2019 by using parallel test method based on the previous covered net tests.The results showed that:1)The body length and anal length of Larimichthys polyactis and Trichiurus lepturus caught by the control and compliant codends were significantly different(P＜0.05),the average body length of Larimichthys polyactis increased by 4.9％and the average anal length of Trichiurus lepturus increased by 35.5％,with obvious release effects.2)The equal split model was the optimal for Larimichthys polyactis and Trichiurus lepturus in parallel test method.The selectivity curves for both Larimichthys polyactis and Trichiurus lepturus were S-shaped,the selectivity increased significantly with the increase in body length of Larimichthys polyactis and anal length of Trichiurus lepturus,and SR values were 5.938 mm and 10.824 mm,respectively.3)The relationship between the escape coefficient(l)and mesh size(m)of Larimichthys polyactis was:l=43.253m-1.042(R2=0.999);the relationship between the escape coefficient(l)and mesh size(m)of Trichiurus lepturus was:l=27.749m-1.066(R2=0.999);the escape difficulty of Larimichthys polyactis was 1.764 times that of Trichiurus lepturus.The results can provide a reference for revising the selectivity parameters of canvas spreader stow net,and for accurately assessing the effect of mesh size on the body length composition of catches.关键词
平行实验法/选择性/参数修正/小黄鱼/带鱼Key words
parallel test method/selectivity/parameter correction/Larimichthys polyactis/Trichiurus lepturus分类
农业科技引用本文复制引用
徐国强,虞宝存,徐开达,潘国良,周永东,许柳雄..基于平行实验法的合规网目对小黄鱼和带鱼的选择性研究[J].海洋渔业,2025,47(5):662-670,9.基金项目
舟山市基础研究项目(2024C31047) （2024C31047）
浙江渔场渔业资源动态监测调查(HYS-CZ-202314) （HYS-CZ-202314）
浙江省沿岸定置张网网格化管理模式研究与示范(2016F30018) （2016F30018）
