罗非鱼繁殖能力强,虽然对它的育苗有利无害.但到收获时参杂很多小罗非鱼,直接影响经济效益。1992年我县利用外资搞渔业开发,在乐亭县翔云岛用鲈鱼与罗非鱼混养,有效地抑制了罗非鱼的繁殖,保障了罗非鱼成鱼的生长.改变了过去用注射激素或革胡子鲶与罗非鱼混养来制约其过剩繁殖的方式.取得了50亩水面利税79913元、亩效益1598.26元的成绩.为我国北方沿海地区进行大面积罗非鱼的养殖开辟了一条新途径。 1 根据水温确定罗非鱼的放苗时间乐亭县地处沿海.一般在6月初水温才能达到罗非鱼的最低生长温度(13C).因此.放苗的最佳时间应在6月 Tilapia reproductive ability, although it is beneficial to its nursery, but when it comes to harvest a lot of small tilapia, a direct impact on economic efficiency. In 1992, the county engaged in fishery exploitation by utilizing foreign capital and polyculture with sea bass and tilapia at Xiangyun Island, Laoting County, which effectively restrained the growth of tilapia and ensured the growth of adult tilapia. Injection of hormones or leather Catfish and tilapia polyculture to restrict the excess reproduction of the way to obtain a 50 acres of water profits and taxes 79,313 yuan, 1598.26 yuan per acre results for large areas of coastal areas in China for the development of tilapia opened up A new way. 1 According to the water temperature to determine the tilapia Laoting time Laoting County is located in the coastal waters generally early in June to reach the minimum growth temperature of tilapia (13C). Therefore, the best time for the release of seedlings should be in June