凶猛鱼类因有吃鱼的特性,故传统的养殖方法,一般主养四大家鱼池塘不搭养凶猛鱼类。 在生产实践中,养成鱼的池塘,每年底干池,1公顷的鱼池产小野杂鱼(麦穗、鳑鮍、小鲫鱼等)少则150～200公斤,多则250～300公斤。这些小野杂鱼不但价格低,不好卖、效益差,而且还与主养鱼争饵料。如在鱼池中合理搭养一些凶猛鱼类(如鳜鱼、乌鳢等),把价值低的小野杂鱼和体弱的主养鱼种除掉,转化为自身价格 Ferocious fish because of the characteristics of eating fish, so the traditional farming methods, the general main four ponds do not fish with ferocious fish. In production practice, fish ponds, dry ponds at the end of each year, 1 hectare fish pond small wild trash (wheat, emu, small carp, etc.) as little as 150 to 200 kg, as many as 250 to 300 kg. These small wild trash not only low prices, not easy to sell, poor efficiency, but also compete with the main fish food. As in the fish pond reasonable take some ferocious fish (such as shad, shaddock, etc.), the small value of the small wild trash and frail main fish species removed, into their own price