论文部分内容阅读
近几年来,湖北省石首市在鱼苗鱼种生产过程中,出现了“三率”不高、鱼种生长慢、成鱼个体小,还有个别畸型鱼等现象,总结出原因:一是亲鱼老化;二是内湖收集的亲鱼多,三代、四代“同堂”,导致近亲交配;三是设备陈旧、鱼池不标准,管理生产手段差。针对这些情况,市水产局决定及早动手,下大决心,采取措施切实提高鱼苗、鱼种质量。
In recent years, Shishou City, Hubei Province, fish production in the process of fish species, there was “three rates” is not high, slow growth of fish species, adult fish, there are individual abnormal phenomenon, summed up the reasons: First, Second, the broodstock collected by Neihu Lake are mostly “three generations” and “fourth generation” of “same generation”, resulting in inbreeding. Third, outdated equipment and fishponds are not standardized, and their management means are poor. In response to these circumstances, the Municipal Fisheries Bureau decided to start early, big determination, take measures to effectively improve the quality of fry, fish species.