Shrimp farming in the Asia-Pacific: environment and trade issues and regional cooperation
Production of farmed shrimp has grown at the phenomenal rate of 20-30% per year in the last two decades. The leading shrimp producers are in the Asia-Pacific region while the major markets are in Japan, the U.S.A. and Europe. The dramatic failures of shrimp farms in Taiwan, Thailand, Indonesia and China within the last five years have raised concerns about the sustainability of shrimp aquaculture, in particular intensive farming. After a brief background on shrimp farming, this paper reviews its environmental impacts and recommends measures that can be undertaken on the farm, country and regional levels to promote long-term sustainability of the industry. Among the environmental effects of shrimp culture are the loss of mangrove goods and services as a result of conversion, salinization of soil and water, discharge of effluents resulting in pollution of the pond system itself and receiving waters, and overuse or misuse of chemicals. Recommendations include the protection and restoration of mangrove habitats and wild shrimp stocks, management of pond effluents, regulation of chemical use and species introductions, and an integrated coastal area management approach. Regional cooperation is needed in research and information sharing, and trade in supplies and equipment. The contribution of farming to global shrimp production has dramatically risen from a mere 6% in 1970 to 26% in 1990 (FAO, 1993). In terms of value, this has meant a 16-fold increase from US$300 million in 1980 to $7 billion worth of cultured shrimp by 1993 (Rosenberry, 1993). Annual growth rate of farmed shrimp has been 20-30% in the last 20 years (Table 1). In contrast, increases in commercial landings of shrimp have stabilized at 2-3% yearly due to the full or close to full exploitation of most wild stocks and high fuel costs. However, the recent failures of shrimp crops in Taiwan followed by China and Indonesia have raised concerns about the sustainability of shrimp aquaculture. This paper will a) give a background of the shrimp farming industry, b) review the different shrimp culture systems, c) evaluate the environmental impacts of shrimp farming, and d) recommend actions to promote long-term sustainability in the industry including suggestions for regional cooperation.
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