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近几年,在湾内养殖病害最多的当属牙鲆鱼类。据初步统计,前几年陆上养殖发病率在30％,海上养殖发病率为50％,而在去年同期的发病率高达80％～85％。 本文针对牙鲆鱼近几年来流行的主要疾病及其防治对策,谈一下自己的看法。 1 细菌性疾病的预报 1.1 爱德华氏菌症 由于夏季的高温,病害增多,本症在周年内均有发生。但是病害往往多发生在水温异常的环境状态。在去年的8月份,在水温26℃左右时,本病大量发生。由于急潮的流入,水温降至23℃左右时,死亡率
In recent years, the most cultivated diseases in the bay belong to flounder fishes. According to preliminary statistics, the incidence of onshore aquaculture in previous years was 30% and the incidence of marine aquaculture was 50%, while the incidence in the same period of last year was as high as 80% to 85%. This article aims at the main diseases flounder flounder in recent years and its prevention and control measures, talk about their own views. 1 bacterial disease prediction 1.1 Edward’s disease due to the summer heat, disease increased, the disease occurred in the anniversary. However, diseases often occur in abnormal water temperature environment. In August last year, when the water temperature around 26 ℃, the disease occurred in large numbers. Due to the influx of ebb tide, the water temperature dropped to about 23 ℃, the mortality rate