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虾病是影响亲虾越冬成活率的主要因素之一。1985—1989年我们在河北省水产研究所和河北省南堡新生盐场进行亲虾越冬时发现在从养殖池挑选的亲虾入室内池后不久一部分亲虾头胸甲发生白化。1988～1989年度头胸甲白化者竟达800多尾。另外,1989年1月14日～1月27日南堡新生盐场越冬亲虾患纤毛虫症造成大量死亡,从1月13日—1月26日就死亡3800尾,严重影响亲虾越冬成活率和育苗。现将对上述病症观察研究及防治试验所取得初步结果报告如下:
Shrimp disease is one of the main factors affecting overwintering survival rate of broodstock. During 1985-1989, when we overwinter broodstock in Hebei Institute of Fisheries and Hebei Newborn Salt Farm in Hebei Province, we found that part of the progeny of broodstock became whitened soon after the broodstock-selected broodstock entered the indoor pool. From 1988 to 1989, the breastplate whitened as many as 800 more tail. In addition, from Jan. 14 to Jan. 27, 1989, a large number of ciliates died in crayfish caused by overwintering shrimp in Nanpu Xinsheng Salt Field. From January 13 to January 26, 3800 dead mice seriously affected the survival rate of crab overwintering And nursery. Now on the symptoms observed and controlled trials and preliminary results obtained are reported as follows: