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Water quality status and Fisheries of Sewage fed tank in Bhadravathi Taluk of Karnataka, India

Author Affiliations

  • 1Research and Teaching Assistant in Environ. Science, DDE, Kuvempu University, Jnana Sahyadri, Shankaraghatta–577 451, Karnataka, INDIA

Res. J. Animal, Veterinary and Fishery Sci., Volume 2, Issue (9), Pages 6-12, September,24 (2014)


Present study deals with the assessment of some physico-chemical , microbial parameters and fisheries activities of a sewage fed Jannapura tank for its suitability of human consumption and fish culture have been carried out during the period 2007-08. The aims of the present study were to determine the water quality, assess nature or humans impact on the physico-chemical and biological characteristics of the tank water with a view to effective utilization, better management, conservation and sustainable exploitation of the tank resources. E-coliforms were used as indicators of bacterial pollution while phosphate, nitrate, BOD and oxygen were used as indicators of possible nutrient enrichment in the tank. This water body lies in the heart of the Bhadravathi town (Karnataka) and continuously receiving sewage from the surrounding residential areas and producing bad odor. The presence of Escherichia coli (E.coli) bacteria in tank may indicate that the water has been contaminated from the domestic sewage. Nitrate, phosphate and BOD values were high depicting cultural eutrophication occurring from surface runoff of nitro-phosphate fertilizers from nearby lands into the tank and the present findings revealed that the water quality of the tank is productive and eutrophic. In addition, fish diversity, species cultured, fish marketing, advantage and disadvantages of sewage fed fisheries in the present water body are discussed in this article.


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