在我们养殖过程中,养殖户会经常发现仔蟹、幼蟹会爬到池边、网边或水草上,不愿下水的现象,养殖者因找不到理想的方法对症防治,常常感到头痛。仔蟹、幼蟹的这种爬到池边、网边或水草上的现象,称为“上岸不下水症”,在养殖过程中经常会遇到。根据笔者长期指导用药防治实践经验,综其产生此现象的原因,一般不外乎四方面的原因及相应对策: 一、由水质差引起的。在养殖过程中,剩余饲料、动植物尸体、死亡藻类、高密度仔蟹、幼蟹的生理排泄物等有机物质在水中不断积 In our farming process, farmers often find crabs, crabs will climb to the edge of the pool, net edge or aquatic plants, unwilling to launch the phenomenon of water because farmers can not find the ideal method of symptomatic prevention and treatment, often feel a headache. Aberdeen crabs, crabs crawling to the edge of the pool, net edge or water on the phenomenon, known as “ashore disembarkation disease,” often encountered in the breeding process. According to the author’s long-term guidance of practical experience in drug prevention and control, the reason for this phenomenon is generally nothing more than four reasons and corresponding countermeasures: First, caused by poor water quality. In the breeding process, the remaining feed, animal and plant dead bodies, dead algae, high density Aberdeen, larvae of physiological excrement and other organic substances in the water is not