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在整个河蟹幼体培育过程中，幼体从Z，叫人的变态是一个非常关键的环节，它的成败与变态率的高低将直接影响整个河蟹育苗的产量。至今，仍没有人对这一环节有十分的把握。通过近几年的育苗生产实践，总结出一套切实可行的技术措施。具体做法如下：（一）孵幼亲蟹的选择。互．亲
In the process of larval culture of larval crabs, larvae from Z, called human metamorphosis is a crucial link, its success or failure rate and the rate of permutation will directly affect the crab nursery production. So far, no one is very sure about this aspect. Through the recent years of nursery production practice, summed up a set of practical technical measures. Specific practices are as follows: (a) hatchling crab’s choice. mutual. Dear