拖网渔业,在世界各国都认为是一种产量较高、渔获品种较好的捕捞方法,尤其是底拖网。在日本,同其他渔业一样,拖网也有许多不同的种类和设计方法。据日本渔协统计,国内有7种类型的拖网:1.母船式拖网;2.北太平洋拖网;3.南太平洋和大西洋拖网;4.外海虾拖网;5.东海对拖网;6.沿岸拖网;7.小型拖网(包括桁拖网和海湾爬网)。在7种拖网中,前一、二类是最主要的。它 Trawling fisheries are considered by all countries in the world as a better fishing method with higher yield and catch varieties, especially bottom trawls. In Japan, as with other fisheries, there are many different types and designs of trawls. According to the Japan Fisheries Association statistics, there are 7 types of trawling in China: 1. Maternity trawling; 2. North Pacific trawls; 3. South Pacific and Atlantic trawls; 4. Sea shrimp trawls; 5. East China Sea trawling; 6. Coastal trawling ; 7. Small trawls (including beam trawls and bay crawls). Among the seven types of trawls, the first and second categories are the most important. it