 In an attempt of minimizing the effect of the dams, the Three Gorges Dam has released water to mimic the (pre-dam) natural flooding and trigger the breeding of carp species downstream.In addition to dams already built in the Yangtze basin, several large dams are planned and these may present further problems for the native fauna.While many fish species native to the Yangtze are seriously threatened, others have become important in fish farming and introduced widely outside their native range.