Studies on invasion and impact of feral population of Nile tilapia (Oreochromis niloticus) in Krishna River of Mahabubnagar district in Telangana, India

Abstract

The present account is an attempt to document the occurrence and abundance of the feral fish, Oreochromis niloticus in Krishna River in Mahabubnagar district of Telangana state, India. In this study, we aimed to determine the abundance of O. niloticus which has formed a feral population in the Krishna River, the largest one in the district. Abundance of O. niloticus in the fishery of the river was observed from January 2012 to December 2014. This feral O.niloticus was calculated which ranged from 35.99 to 48.82% during successive years. And also observed the significant declining of the Indian Major Carp species in the river.