Spatial Pattern Of Aquaculture And Its Influencing Factors In Sichuan Province

Aquaculture products provide high quality protein nutrition,which is an important way to meet people’s food consumption upgrading need.In order to carry out the construction of ecological civilization and the structural reform of fishery supply side,we should strengthen the optimization of the spatial distribution of aquaculture industry in Sichuan Province from the macro management level,and promote the sustainable development of the industry.From the perspective of geography,we can better achieve this goal by exploring the spatial pattern and influencing factors of aquaculture industry in Sichuan Province through spatial analysis and statistical methods.In this paper,the county(District,city)aquaculture industry in Sichuan Province is taken as the research object,combined with the fishery statistical yearbook and local statistical one.The spatial autocorrelation(Moran’s I)analysis method is used to explore the spatial correlation pattern of typical factors of aquaculture industry(aquaculture area,aquaculture product)in Sichuan Province;then,the dominant factors of influencing factors of aquaculture(aquaculture product)in Sichuan Province are screened by using geographic detector;finally,compared with the ordinary least squares(OLS),the geographic weighted regression model(GWR)was used to calculate the spatial heterogeneity of the dominant factors of aquaculture product,and the calculation results were visualized and analyzed.(1)The basic spatial distribution pattern of aquaculture in Sichuan Province from the perspective of agricultural function area scale,the hilly area in eastern Sichuan Province is the largest area of aquaculture development in Sichuan Province,and the plateau area in Northwest Sichuan Province is the smallest;from the perspective of county scale,Renshou County,Mianyang City District,Yibin City District,Chengdu City District,Leshan City District,Meishan City District,Guangyuan City District are the areas with large scale of aquaculture in Sichuan Province.(2)The overall spatial distribution pattern of aquaculture in each county of Sichuan Province is significantly positively correlated.The plain and hilly areas along the Minjiang River and Tuojiang River(including Rong County,Weiyuan County,Zizhong County,Jingyan County,Renshou County,Yanjiang district and Jianyang City)are the main aquaculture cluster in Sichuan Province.(3)Aquaculture area,aquaculture labor force,average product per unit area,number of fresh water fry and population all passed the significance test,which were the main influencing factors of aquaculture product in Sichuan Province.In order to reduce the repeatability of the study,four indicators(including aquaculture area,aquaculture labor force,average product per unit area and number of fresh water fry)are selected as the independent variables of influencing factors of aquaculture industry in Sichuan Province.(4)GWR Model is better than OLS model in performance.In the positive regression coefficient effect of GWR model of the dominant factor of aquaculture product in Si Chuan Province,the aquaculture area decreases from the middle to the north and south,the average product decreases from the northeast to the southwest,the number of freshwater fish fry decreases from the north to the South,while the aquaculture labor force changes from the east to the west from negative to positive.To sum up,combined with the research results of the spatial pattern and influencing factors of aquaculture in Sichuan Province,as well as the actual situation of each region in the study area,this paper puts forward relevant suggestions on the intensive development and differentiated development of aquaculture in Sichuan Province,so as to provide reference for the reasonable optimization of the layout of aquaculture in Sichuan Province and the promotion of sustainable development of the industry.