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福建省的莆田市及闽南地区,年平均温度21℃左右,罗非鱼能自然越冬。在小山塘中放养了罗非鱼,因罗非鱼自繁能力极强,造成罗非鱼密度过大,百分之九十多的罗非鱼无法达到商品规格,也严重影响鲢、鳙鱼的生长,经济效益极低。原因是这些众多的小山塘,塘底水难以排干,清除罗非鱼难度极大,不易控制放养密度,是山塘养殖长期存在的技术难题。笔者在2006至今开展小山塘养鱼中套养鲈鱼的技术研究,总结出:适当套养凶猛性的肉食性鲈鱼。鲈鱼捕食幼、小罗非鱼,降低罗非鱼的密度,提
Putian City and Fujian Province in Fujian Province, the annual average temperature of about 21 ℃, tilapia can naturally wintering. Tilapia are stocked in small ponds, because tilapia have extremely high self-propagation capacity, causing the density of tilapia to be too large. More than 90% of tilapia can not meet commodity specifications, and seriously affect the growth of silver carp, bighead carp The growth of low economic benefits. The reason is that many small ponds, pond bottom water is difficult to drain, tilapia removal difficult, difficult to control the stocking density, pond farming is a long-standing technical problems. In 2006, the author carried out the research on raising sea bass in the small pond ponds and concluded that the appropriate carnivorous bass was properly set up. Perch prey young, small tilapia, reduce the density of tilapia, mention