论文部分内容阅读
近年来由于养殖规模的不断扩大、养殖品种的增多、水域污染加重及病原传播速度加快等原因，致使养殖水域富营养化，养殖地有机污染加重，养殖生态坏境恶化，病害日趋严重，给养殖业造成了不可挽回的损失。据统计目前人工养殖生物病害在200种以上，每年约有1／10养殖面积发生病
In recent years, due to the continuous expansion of breeding scale, the increase of breeding breed, the aggravating of water pollution and the speed of pathogen transmission, the eutrophication of aquaculture water, aggravation of organic pollution in farmed land, aggravation of aquaculture ecological environment and worsening of diseases and diseases, Industry caused irreparable damage. According to the statistics, there are over 200 kinds of biological diseases of artificial breeding at present, and about 1/10 of the breeding area is sick every year