• To identify different aquaculture systems of study sites
• Toanalyses the economics efficiency (cost-benefit of certain aquaculture systems, making comparisons between different systems, etc.) inChuyên Mỹ, PhượngDực and QuangTrung communes, HàNội, Việt Nam.
• To better understand and evaluate the role of aquaculture in benefiting the local people in the northern Vietnam
• To analyze the factor that affected to aquaculture or fish farming in 3 communes, HàNội, Việt Nam.