COMPARATIVE STUDY ON FISH DIVERSITY IN TWO LENTIC WATER BODIES OF BHADRAVATHI TALUK, KARNATAKA

The fish diversity of the Nagappanakere tank and Kudligere tank in relation to physico-chemical parameters was studied by monthly samples taken from February 2010 to January 2011. In this study, Nagappanakere tank supported 13 fish species belonging to 04 orders, 06 families and 12 genera. While, Kudligere tank supported 18 fish species belonging to 04 orders, 07 families and 15 genera. Among fish families Cyprinidae was dominant in both the water bodies. In Nagappanakere tank as far as biodiversity status (IUCN-1994) is concerned, 03 species is Not assessed (23.08 %), 06 species as lower risk-near threatened (46.15 %), vulnerable 02 species (15.38%), lower risk least concern is one (7.70%) and 01 species included under the category of Data deficient (7.69%). However, in Kudligere tank 01 species is endangered (5.55 %), 07 species as lower risk-near threatened (38.89 %), vulnerable 02 species (11.11%), lower risk least concern is one (5.55%) , 06 species included under the category of Not assessed (33.33%) and 01 species consider as Data deficient with 5.55%. Physico-chemical characteristics responsible for the occurrence and distribution of fishes in these water bodies are discussed. Hence, proper management and utilization of this fish wealth is necessary to take up the sustainable steps to monitor and conserve fish health