Environmental consequences of and pollution control options for pond "tra" fish production in Thotnot District, Cantho City, Vietnam

This study examined the environmental consequences arising from pond “Tra” fish breeding and explored wastewater treatment options for bringing water pollution down to an acceptable level. The research showed that the farmers’ practice of exchanging water between fishponds and outside water bodies was one of the main causes of surface water pollution in Tra fish-breeding areas. Wastewater from fish farms is often not treated properly and is dumped into canals, creeks or rivers. “Tra fish” or catfish production has been on the rise in the Mekong Delta, Vietnam, bringing significant profits to commercial fish farmers