The symposium provided a venue for information sharing on extension of small-scale aquaculture targeted to those individuals and relevant organisations involved in various aquaculture development projects. The symposium also assessed and presented the effectiveness of “farmer-to-farmer extension” approaches in the implementation of relevant aquaculture development projects in the region. The symposium was organised by the Japan International Cooperation Agency (JICA), NACA and the Thai Department of Fisheries. 

Shrimp aquaculture in tropical regions is facing a disease-induced catastrophe of lost production. There is reason to believe that current (poor) broodstock management practices may induce genetic erosion that increases susceptibility to disease and vulnerability to epizootics. The basic tenet for this consultation is that an important aggravating factor in the disease crisis is an agro-economic system that locks shrimp breeders, hatcheries and farmers into behaviour that induces high levels of inbreeding.

Shrimp aquaculture in tropical regions is facing a disease-induced catastrophe of lost production. There is reason to believe that current broodstock management practices may induce genetic erosion that increases susceptibility to disease and vulnerability to epizootics. The basic tenet for this Expert Consultation is that an important aggravating factor in the disease crisis is an agro-economic system that locks shrimp breeders, hatcheries and farmers into behaviour that induces high levels of inbreeding.

Efforts to control AHPND have been hampered by the lack of a specific and rapid detection method that could be used to determine the reservoirs of the causative bacterial isolates, to insure their absence in shrimp broodstock and post larvae, to monitor shrimp during cultivation and to aid research on possible control measures. Our two groups have been conducting cooperative research on possible PCR methods to detect isolates of AHPND bacteria.

This report, the 63rd in the series, contains information about the aquatic animal health status of fifteen states in the Asia-Pacific region. The foreword provides an update on acute hepatopancreatic necrosis disease of cultured shrimp, including a description of an improved PCR method for detection of AHPND bacteria.