Evaluation of Eco-economic System Development Efficiency of Marine Fishery in Hainan

Under the background of building a "maritime power" and developing Hainan Free Trade Zone (Port), the marine fishery in Hainan Province has developed rapidly. But at the same time, there have been a series of problems such as the destruction of ecological environment and excessive consumption of resources. Thus, to study the ecological efficiency of marine fishery in Hainan Province is of great significance to the sustainable development of Hainan Province. Based on the total sewage discharge of mariculture is taken as the undesired output, the spatial-temporal evolution characteristics of marine fishery eco-efficiency in Hainan Province from 1998 to 2019 were analyzed by using SBM model, standard deviation and coefficient of variation, and classifying the level of ecological efficiency in the coastal cities and countries of Hainan Province. The results showed that during the study period, the average value of marine fishery eco-efficiency in Hainan, which had taken into account the undesired output, was at a moderate level and fluctuating downward. While the regional differences showed a trend of fluctuating and expansion. The marine fishery eco-efficiency level in Hainan was divided into three categories: high-efficiency, medium-efficiency and low-efficiency. The efficiency categories of cities and counties are different during the same period, such as Haikou belongs to high-efficiency in the "ninth Five-Year" and "eleventh Five-Year" period, but in the "twelfth Five-Year" belongs to medium-efficiency, in the "thirteenth Five-Year" belongs to low-efficiency. It was mainly affected by the diminishing marginal benefit and the lag of ecological restoration. According to the different types of ecological efficiency in Hainan, the differentiated development strategy of the marine fishery was put forward to realize the high-quality development of the marine fishery ecological and economic system.