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中上层鱼类鲐、鲅具有起浮特性,尤其在产卵季节更为明显,鱼群在水面停留时间长,范围广,密度高,传统的底拖作业方式不适宜捕捞该种群体,作为底拖作业的补充形式,浮拖随之应运而生,并取得了初步的成效。对该种尚待进一步探索的作业方式,笔者进行了十余航次的调查,在调查记录的68网次中,发现网具破损现象较为严重,详见下表:
The pelagic 类 and 鲅 of the pelagic fish have the characteristics of rising and floating, especially in the spawning season, fish stay in the water for a long time, a wide range of high density, the traditional bottom-dragging operation is not suitable for fishing the population, as the end As a supplementary form of towing homework, floating drag came into being and achieved initial success. For this type of operation that needs to be further explored, the author conducted a survey of more than ten voyages. Among the 68 recorded in the survey, it was found that the phenomenon of damaged net tools is more serious, as shown in the following table: