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1、注意防逃河蟹极易逃跑,防逃是养蟹管理的首要工作。在防逃方面要抓住关键时期:初放时,由于河蟹苗种变换了生活环境,因不适应而容易逃跑,特别是幼蟹刚进池的一周内逃逸最严重,所以一定要预先建好比较牢固的防逃墙,切不可先放养后防逃。当水质变坏,河蟹为生存而寻找合适的生活环境时,也要逃跑.天气突变、饵料生物缺乏以及“霜降”前后、生殖洄游等时期,河蟹最易逃跑.因此,日常管理中,要经常检查防逃墙、进排水系统,一旦发现问题,立即采取相应的措施。
1, pay attention to escape crab easily escape, anti-escaping is the primary work of crab management. In the anti-fleeing to seize the critical period: the first release, due to change the living environment of crabs, easy to escape due to maladjustment, especially the crab just entering the pool within a week to escape the most serious, so be sure to pre-built More solid anti-evasion wall, must not be put after the anti-flight shelves. When the water quality deteriorates, crabs survive to find a suitable living environment, but also to escape.Camera escapes when the weather is abrupt, lack of food organisms and before and after the “frost drop”, reproductive migration, etc. Therefore, the daily management of the often Check anti-evasion walls, drainage system, once found problems, immediately take appropriate measures.