罗非鱼(Tilapia mossambica),常称非洲鲫鱼。是一种较好的养殖品种。其缺点是养成期繁殖率过高,致使养殖种群密度过大,个体小,尤其是雌鱼口腔含卵孵化时间较长,生长比雄鱼慢很多,故迫切要求获得罗非鱼单性(雄性)养殖的有效方法。近几年来,均用人工挑选雄鱼单养或与肉食性的红眼鳟、乌鳢等混养的方 Tilapia mossambica, commonly known as African carp. Is a better breeding species. The disadvantage is the breeding period breeding rate is too high, resulting in breeding population density is too large, the individual is small, especially the females oral ovulation hatch longer, much slower growth than the male, it is urgent to obtain tilapia unicellular ( Male) an effective method of farming. In recent years, both the use of artificial selection of male or single with the carnivorous red-eye trout, blackbirds and other polyculture side