近几年来,在我国北方地区河蟹养殖面积不断扩大,产量逐年增加。但是,河蟹防逃技术始终困扰着北方广大养殖户。通过几年来对河蟹养殖户的调查,和对南方先进养殖技术的学习,我们总结了北方地区河蟹逃跑原因及防逃对策。1河蟹逃跑的原因1.1生殖洄游的逃跑河蟹在生长发育过程中随着 In recent years, the area of ​​crab farming in the northern part of our country has been constantly expanding, and the output has been increasing year by year. However, the crab anti-escaping technology has always plagued the majority of farmers in the north. Through the investigation of crab farmers in recent years and the study of advanced farming techniques in the South, we summarized the causes of escaping crabs in northern China and the anti-escaping countermeasures. 1 reasons for crabs to flee 1.1 reproductive migration of crabs in the process of growth and development with