作 者：
邢彬彬;齐雨琨;马丁一;林仲帅;李超;许传才
单 位：
大连海洋大学辽宁省海洋牧场工程技术研究中心
关键词：
桁杆拖网;网囊网目选择性;葛氏长臂虾;脊尾白虾
摘 要：
为了解盘锦海域桁杆虾拖网的网囊网目尺寸是否适宜当地渔业生产,使用套网法研究了该网具不同网目尺寸的网囊对葛氏长臂虾(Palaemon gravieri)和脊尾白虾(Palaemon carinicauda)的选择性。结果显示,试验网囊网目尺寸为20、25和33 mm时,葛氏长臂虾的50%选择体长L0.5分别为30.7、36和40 mm,选择范围SR分别为12.2、10.4和13.8 mm,选择性因数SF分别是1.5370、1.4394和1.3310;脊尾白虾的50%选择体长L0.5分别为38.3、40.2和45.3 mm,选择范围SR分别为9.3、14.4和12.9 mm,选择性因数SF分别是1.913 1、1.608 2和1.372 7。两种虾类的50%选择体长(L0.5)和网囊网目内径(m)的线性回归方程为,葛氏长臂虾:L0.5=0.686 9 m+17.691 8;脊尾白虾:L0.5=0.550 0 m+26.955 7。研究认为:盘锦海域常见的20 mm网囊网目的桁杆拖网会捕获大量的幼虾,对渔业资源造成巨大破坏;建议捕捞葛氏长臂虾可用网囊网目内径为33~38 mm的桁杆虾拖网,捕捞脊尾白虾可用网囊网目内径为24~30 mm的桁杆虾拖网。
译 名：
Study on cod-end mesh selectivity of beam shrimp trawl in Panjin sea area
作 者：
XING Binbin;QI Yukun;LIN Zhongshuai;WANG Zhenwei;LI Chao;XU Chuancai;Center for Marine Ranching Engineering Science Research of Liaoning Province,Dalian Ocean University;
关键词：
beam trawl;;cod-end mesh selectivity;;Palaemon gravieri;;Palaemon carinicauda
摘 要：
In order to know whether the beam shrimp trawls are adaptable for fisheries productio in Panjin sea area,the selectivity tests of the beam trawl with different mesh-sizes of cod-end to Palaemon gravieri and Palaemon carinicauda were studied by the covered net method. The results showed that the 50% escapable body length( L0. 5) increased with the mesh size of cod end. When the mesh sizes of cod end were 20,25,and 33 mm,50 % escapable body lengths( L0. 5) were 30. 7,36,and 40 mm respectively for Palaemon gravieri,and 38. 3,40. 2,and 45. 3 mm for Palaemon carinicauda. The Selection Ranges( SR) were 12. 2,10. 4,13. 8 mm for Palaemon gravieri,and 9. 3,14. 4,12. 9 mm for Palaemon( Exopalaemon) carinicauda.And the Selection Factor( SF) were 1. 537 0,1. 439 4,1. 331 0 for Palaemon gravieri,and 1. 913 1,1. 608 2,1. 372 7 for Palaemon carinicauda. The relations between 50% escapable body length and mesh size of the two species mentioned above can be described as follows: Palaemon gravieri: L0. 5= 0. 686 9 m + 17. 691 8;Palaemon carinicauda: L0. 5= 0. 550 0 m + 26. 955 7. Combied with study results and relevant documents,it showed that 20 mm-cod-end-mesh beam trawl could catch a lot of juvenile shrimp and cause a huge destruction of the fishery resources in Panjin sea area.
