Uganda is likely to earn big from Nile Perch exports as its closest competitor- Pangasius a fish species from Asia dwindles at the global market. According to a report from Globefish-a unit in the Food and Agriculture Organisation (FAO) Fisheries Department, there are serious supply constraints from Vietnam the lead supplier of the Pagasius specie after the country suffered floods in 2011.The report says floods have forced nearly 70 per cent of all Pangasius catfish processing plants in the Mekong Delta to shut down, which is likely to prolong supply shortages up to the later part of 2012.