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1989年辽宁瓦房店横山乡水产养殖公司在人工越冬中国对虾亲虾的眼球内和鳃区发现有大量的线虫存在,其中眼球线虫感染率约达30％,鳃区线虫感染率高达90％。 经调查,亲虾被线虫感染原因与当地沉淀池放养对虾有直接关系。据有关资料报道,线虫是鱼类的常见寄生虫病,越冬期间所用水是沉淀池水,镜检发现沉淀池底线虫很多。证实线虫是由沉淀池水带入越冬亲虾培育池水中,然后再进入亲虾体内。 当线虫感染鳃区后,它要从虾体内吸取营养,再加上线虫排泄物在鳃区的逐渐堆积,使虾呼吸能力减弱,
In 1989, Hengshan Township Aquaculture Company of Wafangdian, Liaoning Province found a large number of nematodes in the eyeballs and gill of crab shrimp in artificial overwintering. The nematode infection rate was about 30%, and the nematode infection rate in gill area was as high as 90%. After investigation, the cause of nematode infection of broodstock is directly related to the stocking of shrimp by the local sedimentation tank. According to the information reported, nematodes are common parasitic diseases of fish, water used during the winter is a sedimentation tank water, mirror found a lot of sediment bottom nematodes. Confirmed that nematodes by the sedimentation tank water into the overwintering shrimp breeding pond water, and then into the body of broodstock. When the nematode infection gill area, it is necessary to absorb nutrients from the shrimp body, coupled with the gradual accumulation of nematode excrement in the gill area, so that shrimp respiratory capacity weakened,