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前言尼罗罗非鱼(Tilapla nilotica)属鲈形目鲡鱼科、罗非鱼属。本属约有60多个种,包括亚种在内有100种以上,在原产地最大个体重达11斤。它具有成长快、肉味美适应性强、耐低氧、食性杂、易繁殖、疾病少等优点。联合国粮农组织(FAO)1976年向各国推荐了这个良种,认为它能在短期内向人们提供富有蛋白质的营养食物。该鱼属热带鱼类,水温低于14℃时,生存就受到威胁。为了充分利用天津市的地热、工厂余热等优势,增加养殖良种,提高单位水体产
INTRODUCTION Tilapla nilotica is a member of the genus Perciformes, Tilapia. The genus is about more than 60 species, including subspecies of more than 100 species, the largest in the country of origin weighing 11 pounds. It has the advantages of fast growth, strong adaptability of meat, good resistance to hypoxia, miscellaneous eating, easy breeding and less disease. In 1976, the United Nations Food and Agriculture Organization (FAO) recommended this variety to all countries and considered it capable of providing people with protein-rich and nutritious foods in a short period of time. The fish is a tropical fish, when the water temperature is below 14 ℃, the survival is threatened. In order to make full use of Tianjin’s geothermal, waste heat and other advantages of the factory, increase breeding varieties, improve water production units