吉富罗非鱼与锯缘青蟹混养经济效益分析

海南省罗非鱼产业已成为海南省渔业的支柱产业之一，然而，近年来病害的频发、国际市场的不稳定性、饲料、人工成本的不断增加，直接制约了罗非鱼产业的可持续发展。多品种混养的池塘养殖模式悄然兴起，一方面充分利用池塘水域环境，通过生物与生物之间的关系，调节了水质，提高了养殖品种的成活率；另一方面，通过混养其他经济品种，提高池塘单位面积的经济收益。论文以吉富罗非鱼与锯缘青蟹混养为例，探讨了该养殖模式下养殖成本、养殖经济效益与单养模式的区别。结果表明：罗非鱼与锯缘青蟹混养既能减少养殖病害，有良好的生态效益，又能有效提高罗非鱼单位面积产量，增加养殖总体的经济效益。

Economic benefit analysis of polyculture of GIFT tilapia and mud crab

The tilapia industry has become one of the pillar fishery industries of Hainan Province, however, the sustainable development of the tilapia industry is directly restricted by increased disease frequently, international market instability, feed and labor costs in recent years. The Pond polyculture of varieties began popular in the past few years, it has advantages of utiliazating of pond water environment efficiently, regulating water quality by the interaction of varieties, enhancing the survival rate of breeding varieties; it could also improve economic benefits in per unit area by the polyculture of other economic species. Taking polyculture of GIFT tilapia and mud crab as an example, the differences of the cultivation mode and monoculture mode in breed cost and raising economic benefit was discussed in this paper. The results show that the polyculture of GIFT tilapia and mud crab can reduce breeding disease, increase a good ecological benefit, improve the yield per unit area of tilapia effectively, and increase the overall economic benefit.