Carlson's Trophic State Index(CTSI) was applied to two lakes of Mandya. This index requires the detn. only three physic chem. variables viz., Chlorophylla (CA), total phosphorus (TP) and Secchi disk depth transparency. The index values ranging from 0 to 100 and can be used for classification of trophic state of the lakes. The results of the study showed that the values of CTSI of these lakes ranged between 35-53 indicating that they are mesotrophic. Periodic removal of algal mass and macrophytes may be helpful for minimize pollution and conservation of these still water ecosystems. [on SciFinder(R)]
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