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近几年，随着农业生产结构的调整，山东省龙口市淡水渔业发展较快，农业较多的富裕劳动力，采取租赁、承包等多种形式，投入淡水养殖业。尤其大面积推广立体混养技术，使大中型水库得以合理开发利用，时下渔户养殖的鲢鳙鱼，体大肥满，丰收在望。但由于鲢鳙鱼属中上层鱼类，游
In recent years, along with the adjustment of agricultural production structure, the freshwater fishery in Longkou City of Shandong Province has developed rapidly and the abundant labor force with more agriculture has taken various forms such as leasing and contracting and put it into freshwater aquaculture. In particular, large-scale promotion of three-dimensional polyculture technology, so that large and medium-sized reservoirs can be rational development and utilization of fish farmers nowadays carp bighead carp, large plump, harvest in sight. However, due to silver carp and bighead fish, swim