The present work is an attempt to assess the hydrobiological parameters which included, physico-chemical parameters, zooplanktons, molluscans and the availability of fish fauna was undertaken in the Karanja reservoir located in the northern part of Karnataka. The study was carried out for a period of two years from October 2001 to September 2003. The interesting findings from the study may be summarized as below.The climate of Bidar district is semi arid characterized by precipitation during southwest monsoon season which extends from June to September, overlapping and extension beyond...