去年我镇鳊鱼出血病较普遍发生,主要由放养密度过高及水质差引起。 该病发生时,池内食草量明显减少,水质混浊不堪,开始有少量死鱼浮在水面,数日内突然增多。死鱼头部、鳍条基部等多处出血,腹部有淡红血斑,严重的全身肌肉出血。 我公司渔场于1993年8月下旬成鱼池发现此病,8月28日开始治疗,9月4日完全 Last year, my town catfish hemorrhage occurred more commonly, mainly due to high stocking density and poor water quality. When the disease occurs, the amount of herbivores in the pond is obviously reduced, and the water quality is turbid. A small number of dead fish begin to float on the surface of the water and suddenly increase within a few days. Dead fish head, fin base and many other bleeding, abdomen pale red blood spots, severe systemic muscle bleeding. My company fishing grounds in late August 1993 into the fish pond found the disease, August 28 began treatment, September 4 completely