An economic evaluation of various roles and functions of propagation and aquaculture: A case study
2010
Tamaki, Y., National Research Inst. of Fisheries Science, Yokohama (Japan)
I performed an economic evaluation of various roles of aquaculture, apart from its primary role in supplying marine products. I defined these secondary roles as provision of food security, environmental improvement, exchange between urban and fishing communities, maintenance of traditional culture, and formation and maintenance of local communities. In 2005, aquaculture without the use of prepared feeds removed 6,090 metric tons of nitrogen and 595 metric tons of phosphorus from Japan's coastal seas. The economic value of the reduction in pollution was equivalent to 1,298 hundred million yen by the replacement cost method (the cost of sewage treatment for that amount of waste). From the results of a questionnaire-based investigation of the general public, I estimated by the CVM (Contingent Valuation Method) that non-use value of seaweed grounds around Japan was 553 to 2,109 hundred million yen.
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