Economic Benefits Analysis of Yunnan Aquaculture Fisheries in Ponds and Dams

This article investigated and analyzed the economic benefits of intensive fishery ponds and dams in Yunnan. The following conclusions are obtained: （1） Multi-factor regression analysis shows at the 5% significance level, the net profit is significantly related to the total cost of aquaculture and the marginal contribution rate. The R-square is about 0.77. When other variables are kept constant, for every 1% increase in the marginal contribution rate, the net profit increases by 1830 yuan/hm². In the single factor regression analysis, the total output value, at the 5% significance level, is significantly related to the total cost of breeding. The R-square is about 0.87 and the correlation coefficient is 0.93. Keeping other variables constant, the total cost of aquaculture increases by 15 yuan/hm², and the total output value increases by 23.55 yuan/hm². When the marginal contribution rate is greater than 36.5%, the net profit of aquaculture fishery is greater than 0. （2）Fishery water environment, sales price and feed cost are the main factors that affect the economic benefits of aquaculture fishery. （3）Analysis of operating safety rate shows that, given the price level affected by the pandemic in 2020, aquaculture fisheries have a high risk.