论文部分内容阅读
冬季虽然天气寒冷,但有许多病菌和寄生虫能适应低温环境,并大量繁殖,常能在短时间内导致鱼类发病或死亡。因此,冬季鱼病防治决不可掉以轻心,否则会影响鱼产量。一、发病原因:1、池塘环境条件差,水质受污染,日常管理不当,常会引起鱼类发病。2、鱼塘底泥较厚,在清整消毒时不彻底,残存在池中的病菌和寄生虫,常在冬季适宜条件下继续繁殖生长、传播和寄生鱼体上。3、粪肥和下塘的鱼种消毒不严,会把一些病原体带入鱼塘,易使鱼类患病。4、鱼种在放养时,由于拉网、运输等操作不当,加之气温低,使鱼
Although the weather is cold in winter, many germs and parasites can adapt to low-temperature environment and multiply in large quantities, often resulting in the onset or death of fish in a short period of time. Therefore, the prevention and control of winter fish diseases must not be taken lightly, otherwise fish production will be affected. First, the etiology: 1, poor environmental conditions ponds, water pollution, poor management of the day-to-day, often cause fish disease. 2, pond thick sediment, cleaning and disinfection is not complete, the remaining bacteria and parasites in the pool, often in winter suitable conditions continue to reproduce growth, spread and parasitic fish. 3, manure and pond under the lax disinfection, will bring some pathogens into fish ponds, easy to make fish sick. 4, species in stocking, due to pull the net, transport and other improper operation, combined with low temperature, the fish