author(s)
JP Yadav, BK Sharma, SK Sharma, B Upadhyay and RK Patel

abstract
An experiment was conducted to determine the primary productivity and to assess the planktonic diversity of Mahi Bajaj Sagar Dam Banswara, Rajasthan with relation to its fisheries potential. The gross primary productivity (GPP), net primary productivity (NPP) and community respiration (CR) were determined. The species identification was done under the microscope. Average value of the reservoir was observed GPP- 0.37 g C m-3 h-1, NPP 0.21 g C m-3 h-1, and CR 0.14 g C m-3 h-1. The outcome of the present study from a planktonic diversity of Mahi Dam, a total of 19 species of phytoplankton was noticed. Out of 19 species of phytoplankton, 6 were from Cyanophyceae, 7 were from Chlorophyceae, 5 were from Bacillariophyceae and 1 belonged from Euglenophyceae from this Dam. Cyanophyceae is a dominant group among all. The result of the present study revealed that the water was productive. From the present study it can be suggested that the water body of the reservoir is suitable for the fisheries.