山东省有多年罗非鱼养殖的历史,但由于所养殖罗非鱼几乎都是体色发黑或发灰的尼罗罗非鱼,无论品质还是规格都很难达到出口要求,而内销价格低廉且市场有限,造成大量罗非鱼商品鱼库存积压,致使罗非鱼养鱼户无利可图,严重挫伤了广大养鱼户的积极性,以致近年来山东全省罗非鱼产量不但没有增加,反而有所萎缩。 彩虹鲷(Tilapia zilliger vais)系鲈形目,丽鱼科,是罗非鱼属内基因突变种,经过中间多代杂交选育而成的十分优良的品种,以前在山东省很少 Shandong Province has many years of tilapia farming history, but due to the cultivation of tilapia are almost black or gray body color of Nile tilapia, regardless of quality or specifications are difficult to meet the export requirements, while domestic sales at low prices And the market is limited, resulting in a large inventory of tilapia fish stocks backlog, resulting in unprofitable fish farmers tilapia, seriously dampening the enthusiasm of the majority of fish farmers, resulting in Shandong Province in recent years, tilapia production has not increased, But has shrunk. Rainbow snapper (Tilapia zilliger vais) Department of Perciformes, Cichlid, is a tilapia gene mutation, after many generations of cross-breeding from the very good varieties, previously rarely in Shandong Province