在我国淡水渔业生产中,草鱼种的越冬成活率低,对生产的危害较大。草鱼种越冬成活率低的原因是多方面的,它除了生活环境不适的影响之外,因疾病引起的死鱼也是主要的原因之一。因此,研究查明草鱼种在越冬期间寄生虫的种类和动态,对防治草鱼种在越冬期间的疾病,提高其成活率是有一 In the production of freshwater fishery in our country, the survival rate of grass carp species is low, which is harmful to the production. Grass carp overwintering survival rate is low, there are many reasons, in addition to the impact of discomfort on the living environment, due to disease caused by dead fish is one of the main reasons. Therefore, the study identified species of grass carp parasites during the wintering and dynamics, prevention and treatment of grass carp species during the winter disease, improve its survival rate is a