Q. 135.0( 1 Vote )

Alien species are

Answer :

When alien species are introduced deliberately or unintentionally or any purpose to a new environment, some of them may turn to be invasive or destruction causing for the indigenous species over there.

Example:


• Introducing Nile perch into Lake Victoria in East Africa caused the extinction of more than 200 species of cichlid fish in the lake.


• Illegal introduction of the African catfish Clarias gariepinus for aquaculture purpose is posing a great threat to indigenous catfishes in our rivers.


• Carrot grass (Parthenium), Lantana and water hyacinth (Eichhornia) are among the invasive weed species which are a great threat to the native species.


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