Introduced Nile perch devastated Lake Victoria’s native cichlids and fishery

In the late 1950s and early 1960s, Nile perch were introduced into Lake Victoria with the hope that the large predatory fish would strengthen local fisheries. The decision was intended to create new commercial opportunities and increase the supply of valuable fish. Instead, the species spread through one of the world’s largest freshwater ecosystems and became linked to a dramatic decline in native fish. TheNational Invasive Species Information Center says Nile perch were introduced to Lake Victoria in 1954 and later destroyed about 200 native fish species through predation and competition for food. The story has become a powerful example of how a well-intentioned fisheries decision can produce consequences that extend far beyond its original goal.Why Nile perch were introducedLake Victoria, shared by Kenya, Tanzania and Uganda, has long supported communities that depend on fishing for food, income and trade.