J. Bio. Env. Sci.15(4), 59-66, October 2019
The study was carried out to document the water quality, planktonic and ichthyo-diversity of riverine ecosystem. Tangon river was selected for the purpose of the study. Data were collected fortnightly from four sampling sites from April 2016 to March 2017. Water temperature was fluctuated between 19.70 and 35.90°C, Dissolved oxygen (DO) content ranged between 5.00 and 9.40mg/L, pH fluctuated in the acidic to alkaline range (6.26-9.40) and total alkalinity fluctuated between 4.00 and 18.00mg/L. The abundance of phytoplankton to total plankton was high (83%) and their diversity in the river is represented by four groups in order of dominance as follows: Chlorophyceae> Bacillariophyceae> Cyanophyceae> Euglenophyceae. A total of 17 fish species belonging to 7 families were identified from the River. However, it is suggested that the river is still in productive condition. Therefore, the policy makers should take different management tactics to keep the riverine ecosystem pollution free and sustainable for capture fisheries as well.
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