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近几年,随着河蟹苗种培育技术的完善和大力推广应用,河蟹池塘养殖面积日益增大,带动了地方渔业经济的发展,为内陆渔民创业致富开辟了新途径。但是,在河蟹养殖生产过程中普遍遇到蟹种性早熟的技术难题,直接影响河蟹养殖的产量和经济效益。我们在几年的养殖试验中,对产生性早熟的原因及预防措施进行了专题分析和试验,报告如下:1 性早熟的危害1.1 危害 河蟹性早熟就是在尚未达到商品规格时,已由黄蟹蜕壳变为绿蟹,性腺成熟。如在盐度变化的刺激下,能
In recent years, with the improvement and popularization and application of culture techniques for crab and seed breeding, the growing area of crab and ponds has led to the development of local fishery economy and opened up new avenues for the inland fishermen to get rich. However, the technical problems of precociousness of crabs are generally encountered during the production of crab farming, which directly affects the production and economic benefits of crab farming. We in a few years of breeding trials, the reasons for the occurrence of precocious puberty and preventive measures conducted a thematic analysis and testing, the report is as follows: 1 precocious harm 1.1 precocious pheasant precocious puberty is not yet reached the product specifications, has been from the yellow crab Moults become green crabs, gonads mature. As stimulated by changes in salinity, can