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当前位置: 首页 > 文章 > 南海区桁杆虾拖网方目与菱目混合网囊网目选择性研究 南方水产科学 2018 (1) 105-113
Position: Home > Articles > Size selectivity of combined square mesh and diamond mesh codends of shrimp beam trawl in South China Sea South China Fisheries Science 2018 (1) 105-113

南海区桁杆虾拖网方目与菱目混合网囊网目选择性研究

作  者：
杨炳忠;杨吝;谭永光;晏磊;张鹏;李杰
单  位：
中国水产科学研究院南海水产研究所农业部南海渔业资源开发利用重点实验室
关键词：
桁杆虾拖网;方目与菱目混合网囊;网目选择性
摘  要：
为了研究桁杆虾拖网方目与菱目混合网囊网目的选择性,2016年8月在南海北部采用"套网法"对网目尺寸分别为25 mm方目+25 mm菱目(H_1网囊)、30 mm方目+25 mm菱目(H_2网囊)和35 mm方目+25 mm菱目(H_3网囊)的3种混合网囊进行了生产性试验。运用Logistic模型拟合主要渔获种类的体长选择性曲线,并对模型拟合度的优劣进行了评价。结果表明,3种混合网囊的优势渔获种类为刀额新对虾(Metapenaeus ensis)、周氏新对虾(M.joyneri)、脊尾白虾(Exopalaemon carinicauda)和丽叶鲩[Caranx(Atule)kalla];H_1和H_3网囊对刀额新对虾的50%选择体长(L50)分别为63.93 mm和67.96 mm;H1、H2和H3网囊对周氏新对虾的L_(50)分别为62.08mm、66.30 mm和67.32 mm;H1和H3网囊对脊尾白虾的L_(50)分别为53.83 mm和56.69 mm;H_1、H_2和H_3网囊对丽叶鲩的L_(50)分别为59.24 mm、61.63 mm和64.64 mm;比较主要渔获种类L_(50)及其开捕规格,认为H3网囊在兼顾生产效益和保护渔业资源方面效果最理想。
译  名：
Size selectivity of combined square mesh and diamond mesh codends of shrimp beam trawl in South China Sea
作  者：
YANG Bingzhong;YANG Lin;TAN Yongguang;YAN Lei;ZHANG Peng;LI Jie;Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture;South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences;
关键词：
shrimp beam trawl;;combined square mesh and diamond mesh codend;;selectivity of mesh size
摘  要：
In order to investigate the size selectivity of combined square mesh and diamond mesh codend of shrimp beam trawl in the South China Sea, we conducted fishing experiments using three combined square-mesh and diamond-mesh codends: codend with25 mm square-mesh+25 mm diamond-mesh(H_1 codend), codend with 30 mm square-mesh+25 mm diamond-mesh(H_2 codend), codend with 35 mm square-mesh+25 mm diamond-mesh(H_3 codend). The logistic curve was used to analyze selective parameters of codends for main target species, and model deviance was compared with the degree of freedom to test the fit of models. The target species of combined mesh codends were Metapenaeus ensis, M.joyneri, Exopalaemon carinicauda and Caranx(Atule) kalla. The50% retention lengths(L_(50)) of M.ensis were 63.93 mm and 67.96 mm for H_1 and H_3 codends, respectively. The L_(50) s of M.joyneri were 62.08 mm, 66.30 mm and 67.32 mm for H_1, H_2 and H_3 codends, respectively. The L_(50) s of E.carinicauda were 53.83 mm and56.69 mm for H_1 and H_3 codends, respectively. The L_(50) of C.(Atule) kalla were 59.24 mm, 61.63 mm and 64.64 mm for H_1, H_2 and H_3 codends, respectively. According to the L_(50) values and minimum landing sizes of main target species, H_3 codend had the best efficiency both in maintaining fishing product and protecting fishery resources.

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