Invasion of alien animal species eliminates the native animal species. Give two examples.
Examples where invasion of alien species resulted in the elimination of native animal species are:
1. The Nile perch introduced into Lake Victoria in East Africa led eventually to the extinction of an ecologically unique assemblage of more than 200 species of cichlid fish in the lake.
2. The illegal introduction of the African catfish Clarias gariepinus for aquaculture purposes is posing a threat to the indigenous catfishes in our rivers.