一、引言日本是发展网箱养鱼较早的国家之一。1928年已零星出现过网箱养鲫(Seriola quinqueradiata)。但大规模地生产还是1963年以后发展起来的。在日本水产养殖业中,鰤鱼养殖占最重要地位。鰤鱼产量大致占海水鱼养殖总产量的95%。网箱养鰤发展相当快,浮式网箱最为流行。1974年已有4,422,000米~2网箱面积。近年 I. Introduction Japan is one of the earliest countries to develop cage fish farming. Sergiola quinqueradiata appeared sporadically in 1928. However, large-scale production was developed after 1963. In Japan’s aquaculture, catfish farming is the most important. Catfish production accounts for about 95% of the total marine aquaculture production. Cages raise pretty fast development, the most popular floating cage. In 1974 there were 4,422,000 m 2 cages. in recent years