近年来,河蟹人工养殖发展迅速。但在养殖过程中常因病死亡。现就河蟹养殖阶段的病害及其防治措施介绍如下: 1、纤毛虫病 ①病症:病蟹鳃部、整个头胸部、腹部和四对步足(除复眼、口器、肢节等部位外)有大量纤毛虫附生,仅有少数河蟹为局部少量寄生,附生后的河 In recent years, crab artificial breeding has developed rapidly. But often died during the breeding process. Crab farming stage disease and its prevention measures are described below: 1, ciliates Disease 1 disease: crab gills, the entire head and chest, abdomen and four pairs of foot (except compound eyes, mouth, limbs and other parts) There are a large number of ciliates epiphytic, only a few crabs for the local small amount of parasites, epiphytic river