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(一)注重现场调查首先是对养殖水域的水环境和周围环境状况等进行了解。在有鱼病发生的水域,要了解底泥、水质、水温和水色变化等情况,了解是否有有毒、有害物质进入养殖水域;其次要了解饲养管理情况。在调查时,要对投饲情况、施肥情况、放养密度、品种与规格、搭配比例及捕捞操作等情况详细了解,对
(A) pay attention to the site survey First of all, aquaculture water environment and the surrounding environment to understand. In the waters where fish diseases occur, it is necessary to understand the changes of sediment, water quality, water temperature and water color to see if any toxic or hazardous substances have entered aquaculture waters. Secondly, we should understand the management of feeding. During the investigation, we should have a detailed understanding of feeding situation, fertilization situation, stocking density, varieties and specifications, matching proportion and fishing operation, etc.