Answers

Anand
Aug 1, 2020

Intentional or chance introduction of exotic species into new islands or countries by man is called alien species invasion. For example, Nile perch introduced into Lake  Victoria in East Africa caused loss of more than 200 species of cichlid fish. Plant alien species-Lantana camara and animal alien species – Clarius gariepinus are a threat to  our Indian native species.