Limnological study of Hosahalli Pond in Shivamogga district, Karnataka

H M Ashashree; B R Kiran

Limnological study of Hosahalli Pond in Shivamogga district, Karnataka

Authors
H M Ashashree, B R Kiran

Abstract
The present study deals with the physico-chemical parameters and biotic communities of Hosahalli pond of Shivamogga district, Karnataka during January to June 2021. In this study, 64 species of phytoplankton, 11 species of zooplankton, 07 species of hydrophytes, 04 species of aquatic insects/ beetles, 03 species of molluscans and 01 species each of annelid worm, rhizopoda and parasitic ciliates are recorded. The water temperature ranged from 22 to 28^OC and the pH of the Hosahalli pond water was slightly acidic to slightly alkaline in nature. DO values varied from 2.4 to 4.6 mg/l. While, BOD level fluctuated between 7.0 and 8.8 mg/l. Carbon dioxide value varied 10.9-28 mg/l. However, chloride content of the water deviated from 90.2 to 112.6mg/l. The total hardness ranged from 90 to 116 mg/l. The results have revealed that the Hosahalli pond is contaminated due to human conflict, entry of domestic waste and agricultural runoff from the nearby area.

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