Analysis Of Sustainable Development Of Dongji Mytilus Coruscus Aquaculture Eco-economic System

This paper had used three analysis methods from three level and angels to analysis the sustainable development of dongji Mytilus Coruscus aquaculture eco-economic system. Firstly, the emergy analysis method had been adopted to analysis the relationship between the mussel aquaculture area and the natural and discuss the sustainable development of ecosystem. Next, the fuzzy comprehensive evaluation method was adopted to analysis the situation of water quality change in mussel culture area in a year for safety and health of aquaculture in the future. Lastly,after understanding the health of aquaculture ecosystem, the method of how to get more economic benefits of mussel aquaculture under the ecological and environmental sustainable development is also important. So the SPSS17.0 software had been used to research the economic benefits of mussel aquaculture for artificial breeding to increase production, as well as the sustainable development of aquaculture eco-economic system.Mussel aquaculture areas in the study was located in Zhejinag province,Zhoushan city, Zhongjieshan islands, which was constituted by Temple Lake Island,Qing bang island, Huang xing island, East island and west island. Aquaculture sea current was relatively complex. On the one hand, the effect of the Yangtze River and the Qian Tang river runoff was obvious; on the other hand, it was under the Taiwan warm current form north and south down cool sea coast of Yellow sea water mass convergence effects. Therefore Mussel aquaculture areas around the sea was rich in nutrients, and fishery resources was very abundance.First of all, this paper selected emergy analysis method for establishing a related index system to analysis mussel aquaculture ecosystem in Dongji. In the study,indictors such as TR, ED, ELR, EYR, PEEI and ESI were used to evaluate the impacts of mussel aquaculture to the environment,as well as the sustainability of this aquaculture ecosystem. The results showed that the solar emergy conversion rate TR of mussel aquaculture ecosystem was 3.35E+09sej/g, the environmental load rate ELR was 0.45, the emergy output rate EYR was 3.22, the production efficiency ofemergy input PEEI was 9.60E-10g/sej and emergy sustainable development index ESI was 7.16. Based on the above analysis and compared with the other four aquaculture ecosystems,we found that mussel aquaculture ecosystem had high emergy output rate and emergy sustainable development index.As the same time, after by material flow, energy flow to understand the sustainable development situation of Dongji mussel culture area; I had considered the existed fuzziness in the assessment of sea water quality analysis in Dongji’s mussel aquaculture areas, so the fuzzy comprehensive evaluation method was adopted in this paper to make the water quality objective evaluation in the studied area. I had used the concept of relative membership degree and expert scoring method of subjective values to weight objectively each evaluation factor; and evaluated mussel culture areas water quality change trend of health from November 2013 to October 2014. The results was followed: in this period, health evaluation index was the highest in November 2013(0.773), and health evaluation index was the lowest in October2014(0.412).The last but not least, considered to maintain the sustainable and healthy development of mussel farming ecological system, but also to ensure the production of thick shell mussel; and to clarify correlation among quantitative traits and compositions influencing production, 13 quantitative traits including 10 morphological traits(shell length, shell width, shell height and so on) and 3 weight traits(total weight, shell weight and tissue weight) of Dongji’s Mytilus Coruscus were measured and analyzed from 125 randomly chosen individuals by correlation analysis,multiple regression analysis, path analysis and determination coefficient analysis. The results showed that there were significant correlation(P<0.05) among the 13 measured traits, and correlation coefficient ranged from 0.233 to 0.975. Building regression equations between total weight(GW), shell weight(KW)and tissue weight(RW) and morphological traits of shell length(SL), shell width(SW), shell height(SH) and so on, as well as the equations were as followed: GW=-34.511+10.058SH+5.844SW+2.121OC(R2=0.771);KW=-8.209+4.482SH+2.082SW(R2=0.771); RW=-9.549+2.274SH+1.648SW+1.025CD(R2=0.625). Therefore, the research results should be engaged in artificial breeding of Dongji’s Mytilus Coruscus of providing a reference for the theory, with the aim to choose high shell, as well as attaching great importance to the synergistic selection of shell width.