几十年来,我国陆续从国外和境外引进了几十种淡水食用鱼类,其中有十几个养殖品种在生产中表现出较好的生长性状,已获得较高的经济效益。如罗非鱼目前年产量已达数十万吨,超过了世界其他国家的总和。这些引进的新品种数量虽然不多,但对我国渔业发展起到了促进作用。 近年来,随着人民生活水平的提高,名特 For decades, China imported dozens of freshwater food fish species from abroad and abroad successively. Among them, more than a dozen breeding species showed good growth traits in production and obtained higher economic benefits. Such as tilapia current annual output has reached hundreds of thousands of tons, more than the rest of the world’s total. Although the number of these new varieties introduced is small, they have played a catalytic role in the development of fisheries in our country. In recent years, with the improvement of people’s living standards, Ming special