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1材料与方法该病研究分两方面进行:一是实地调查观测鱼病症状及水环境状况,选择以湖北省阳新县竹林塘渔场与无锡市蠡园水产养殖场为主要调查观察点;二是模拟生态环境进行实验研究及检测有关各项指标。具体做法如下。1.1实验鱼卵及鱼苗取自蠡园养殖场,品种有草鱼、鲢鱼及鳙鱼;规
1 Materials and Methods The disease research in two aspects: First, the field survey to observe the symptoms of fish disease and water environment, the selection of Yangxin County, Hubei Province, Zhu Lin Tung Fisheries and Wuxi Xiyuan aquaculture farms as the main survey point; the second is Simulated ecological environment for experimental research and testing of the relevant indicators. Specific practices are as follows. 1.1 Experimental fish eggs and fry taken from the park farms, species of grass carp, silver carp and catfish; rules