Association for Biodiversity Conservation & Research

Paper in Press

Research article
3. Carlson’s Trophic State Index for The Assessment of Trophic Status of Freshwater Lake (Pedda Cheruvu), Mahabubnagar District, Telangana

Zeba Parveen1 Azra Parveen2, M. Rajashekar5*, Ashwini Deshpande3, D. Madhusudan Reddy4 and Pindi Pavam kumar4

1   Department of Zoology, Bi Bi Raza Degree College for women, Kalaburagi-585106, Karnataka

2   Department of Zoology, Government First Grade College, Vijayapura. 586101 Karnataka

3  Department of Zoology, NTR Women’s Degree College, Mahabubnagar-509001, Telangana

4  Department of Microbiology, Palamuru University, Mahabubnagar-509001, Telangana

5   Department of Zoology, Palamuru University, Mahabubnagar-509001, Telangana

*Corresponding Author:  

Received: 22 October 2020; Accepted: 15 December 2020


Abstract: The present investigation is aimed at determining the trophic status of the freshwater lake of Mahabubnagar city by using Carlson’s Trophic State Index (CTSI). This trophic status calculation is carried out on the basis of three variables viz., Secchi disc depth (SD), Total phosphorus ( TP) and Chlorophyll-a (Chl-a). The results revealed that, Secchi’s depth (0.3m to 0.4m), Chlorophyll-a (82.2 µg/l to 315.2 µg/l) and Total phosphorus (202.0 µg/l to 341.0 µg /l). The findings clearly state that, the lake is in highly eutrophic condition, which indicates the high concentration of nutrients in the lake. There is an urgent need to take action to restore the water body of Mahabubnagar.


Keywords: Restoration, TSI, Aquatic ecosystem and Eutrophication

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