13.Decline in the population of Indian native fishes due to introduction of Clarias gariepinus in river Yamuna can be categorized as A. Alien species invasion B. Co-extinction C. Habitat fragmentation D. Over exploitation
Option A. This is because – Introduction of the African catfish Clarias gariepinus for aquaculture purposes has become a threat to indigenous catfishes in our rivers. Clarias gariepinus is an alien species for the communities in Yamuna
