increasingly important targeted species, as its culture, especially in rice fields, is considered
to have the potential to raise income among improverished farmers. The production of M.
rosenbergii based on aquaculture reached over 10 000 tons per year in 2002, having
increased from about 2500 tons since the 1990s. Until recently, lack of a stable supply of
seed had been an important obstacle to the further expansion and development of M …