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几年来,笔者一直致力于生态围栏养殖河蟹的试验、示范与推广工作,通过长期的实践与观察,总结出以下几个值得重视的养殖管理环节,供读者参考。 一、清除敌害鱼类 河蟹的天然敌害很多,危害较大的有乌鳢、鲶鱼、鲤鱼和草鱼等,这些鱼类不但与河蟹抢食底栖动物和优质水草,而且还会吞食扣蟹,在扣蟹放养前,采用网捕、电捕或鹰捕等方法进行一次彻底的清除。
Over the past few years, the author has been committed to the experiment, demonstration and promotion of ecological fencing breeding crabs, through the long-term practice and observation, summed up the following several aspects of aquaculture management links for readers reference. First, the removal of predatory fish crab natural predators, a lot of the more harmful are clams, catfish, carp and grass carp, these fishes not only eat benthic animals and crabs and quality aquatic plants, but also swallow crabs, In the crab stocking before the use of net catching, catching or eagle catching methods such as a thorough removal.