在大水域和深水域进行网箱养鱼是近年来淡水养鱼取得的一项重大的利研成果。但过去的网箱一般采用封闭型,网箱较小,每只网箱一般只有30平方米左右,悬挂于水中,这种网箱成本较高,不易管理。1987年监利县老江河鱼场在中国科学院水生生物研究所的支持下,对网箱结构、规格和养鱼的种类进行了改进,取得了较高的产量和效益。该场1987年放养9口大网箱,共计4000平方米,折合水面6亩。10月18日,中科院水生所,长沙农业现代化研究所,华中农业大学和省、地有关部门的专家教授在现场进行了验收,9口网箱共产成鱼69498公斤(其 Fish cage culture in large waters and deep waters is a major achievement in freshwater fish farming in recent years. However, the past cages are generally closed type, smaller cages, each cages generally only about 30 square meters, hanging in the water, this cage cost is higher, not easy to manage. With the support of the Institute of Hydrobiology, Chinese Academy of Sciences, in 1987, the Laojiang River Fish Farm in Jianli County improved its cage structure, specifications and types of fish farming and achieved high yields and benefits. The market in 1987 stocked 9 large cages, a total of 4,000 square meters, equivalent to 6 acres of surface water. On October 18, experts and professors from Chinese Academy of Sciences Institute of Hydrobiology, Changsha Institute of Agricultural Modernization, Huazhong Agricultural University and provincial and prefectural departments conducted inspection at the scene. The total population of 9 cages was 69498 kg