单 位：
江苏省启东市海洋与渔业局;上海水产大学海洋学院
关键词：
霞水母;张网;兼捕减少装置;释放率;逃逸率
摘 要：
近年来,霞水母的旺发严重影响了东、黄海秋冬汛张网渔业。为了维持渔业生产的正常进行,利用霞水母和目标渔获物的个体大小以及行为特性的差异,通过在网囊前安装网目长度为45cm的分隔网片和释放口所组成的兼捕减少装置(BRD)来释放霞水母。根据2000年和2001年的海上试验显示,该装置能有效减少霞水母兼捕,平均释放率达91.29%;而目标种类的平均逃逸率为13.35%,其中梭子蟹、鲳鱼的逃逸率较高,分别为52.84%和33.44%,带鱼和小黄鱼的逃逸率较低,分别为5.23%和6.27%,棘头梅童鱼的逃逸率为9.14%;同时由于霞水母的释放,使得作业中的暴网事故明显减少;霞水母BRD自设计开发、试验以后,得到了广泛的运用,自2003年起,已在江苏省启东市所辖350余艘张网渔船上全面推广应用。
译 名：
Preliminary research on Cyanea nozakii bycatch reduction device in stownet fishery
作 者：
PENG Yong-zhang1,ZHANG Jian2,SUN Man-chang2(1.Oceanic Fisheries Bureau of Qidong City,Jiangsu Province,Qidong 226200,China;2.College of Marine Science & Technolgy,Shanghai Fisheries University,Shanghai 200090,China)
关键词：
Cyanea nozakii;stownet;bycatch reduction device;exclusion ratio;escapement ratio
摘 要：
In the Yellow Sea and East China Sea,breakings out of jellyfish(Cyanea nozakii)has disturbed the stownet fishery in autumn and winter fishing period of recent years.In order to maintain the stownet fishery operation,a bycatch reduction device consisted of a inclined panel with 45mm mesh length and escaping outlet rigged before codend has been developed and tested on sea trial to separate to exclude the jellyfish bycatch based on the differences of individual size and swimming behavior toward stownet between jellyfish and target species.It has been shown that the BRD performed well in jellyfish separation and exclusion and the average exclusion ratio reached 91.29% in weight.The escapement ratio of total target species in weight reached 13.35% and that of each species was respectively as follows: 5.23% for Trichiurus haumela,6.27% for Larimichthys polyactis,33.44% for Pampus spp.9.14% for Collichthys lucida and 52.84% for Neptunus.Destroy of stownet caused by a large amount of jellyfish bycatch has been mitigated after the development of BRD.The BRD has been applied widely after the experiment and all stownet fishing vessels(more than 350) administered by Qidong City,Jiangsu Province have been rigged since 2003.
