WorldFish is an international, nonprofit research organization that harnesses the potential of fisheries and aquaculture to reduce hunger and poverty. Our publications database contains WorldFish publications and references to WorldFish research published in refereed journals and periodicals.
More than half of the 4 million hectares of the Mekong Delta are covered by acid sulfate soils (ASS). Most ASS areas have been reclaimed for agricultural production during recent decades by means of new canals, new settlements, floodplain drainage, and new rice varieties and cropping systems. In 1996, agriculture occupied 83% of the total area of the Delta. Urban areas account for 10% of the total area. This leaves only 7% for natural or semi-natural wetlands.
The integration of paddy cultivation with prawn/fish culture can become a viable alternative to effectively utilize the vast area of derelict polders (embanked coastal flood plains) in Kuttanad, India. Nearly 55 000 ha of wetlands in Kuttanad are available for paddy cultivation year-round. Around 5 000 ha of the polders are utilized for Macrobrachium rosenbergii culture as a follow-up crop. Of the total area, about 250 ha of fallow polders are utilized for monoculture of M.
This paper deals with relationships between hydrology, wetlands and fisheries production in the Mekong River Basin. A five-year monitoring of the bag net ("dai") fishery in the Tonle Sap River (Cambodia) showed a strong correlation between catches and water level in the same year. One taxon making up to 37% of total catches explains most of the relationships between catches and water level. The current overall catch in the Tonle Sap system amounts 230,000 tons a year.