Which of the following statements shows an example of alien…

Biology Biodiversity and Conservation General Single Correct MCQ

Published on: August 21, 2026

Which of the following statements shows an example of alien species invading a new ecosystem resulting in biodiversity losses?

Introduction of Nile perch into lake Victoria in East Africa

Introduction of water hyacinth into India

Introduction of African catfish into Indian rivers

All of the above

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The correct answer is:

All the listed examples are alien species invasions that harmed local biodiversity:

Nile perch in Lake Victoria → decimated native fish species

Water hyacinth in India → choked water bodies, reduced native aquatic plants

African catfish in Indian rivers → competed with and predated native fish

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