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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。
In recent years, Xia jellyfish sent a serious impact on the east, the Yellow Sea autumn and winter flood fishing network. In order to maintain the normal operation of fishery production, taking advantage of the individual size and behavioral characteristics of Xia jellyfish and the target catches, a bycatch reduction device consisting of a mesh net with a mesh length of 45 cm and a release port (BRD) to release the jellyfish. According to the sea trials conducted in 2000 and 2001, this device can effectively reduce the occurrence of krypton jellyfish with an average release rate of 91.29%, while the average escape rate of target species is 13.35%. Among them, Respectively, 52.84% and 33.44% respectively. The escape rates of octopus and small yellow croaker were 5.23% and 6.27% respectively, while the escape rate of spinefish was 9.14%. At the same time, due to the release of Xia jellyfish, Accident was significantly reduced; Xia jellyfish BRD since its design and development, testing, has been widely used since 2003, has been in Qidong City, Jiangsu Province, more than 350 Zhang Zhang fishing vessels fully operational application.