罗非鱼的耐盐性较广,大多数罗非鱼既能在淡水中生长又能在海水生长。笔者通过人工配制了4个盐度的咸水(0‰、10‰、20‰、30‰),分别从成活率、绝对增重量、瞬时增重率等3个方面对莫桑比克罗非和尼罗罗非鱼的生长进行了初步研究。通过试验研究对比发现,莫桑比克罗非鱼的生长随着试验盐度的升高呈上升趋势,适合在海水中养殖;而尼罗罗非鱼的生长随着试验盐度的升高呈下降趋势,更适合淡水养殖。 Tilapia salt tolerance is broader, most tilapia both in fresh water and in seawater growth. Four salinity saltwater (0 ‰, 10 ‰, 20 ‰ and 30 ‰) were prepared by the authors. The effects of different treatments on the survival rate, absolute weight gain and instantaneous weight gain rate were analyzed. The growth of tilapia was studied initially. The results showed that the growth of tilapia in Mozambique increased with the increase of test salinity, which was suitable for aquaculture in seawater. However, the growth of Nile tilapia decreased with the increase of test salinity, More suitable for freshwater aquaculture.