author(s)
Kamlesh Kumar and Vijay Kumar Yadav

abstract
In the present study, total thirty planktonic members from the four sampling sites of the selected research area in which, twelve phytoplanktons and eighteen zooplanktons each under the four different groups namely (Chlorophyceae, Bacillariophyceae, Cyanophyceae, Euglenophyceae) and (Protozoans, Rotiferans, Cladocerans, Copepods) were recorded respectively. Among all the recorded phytoplanktonic groups, the Chlorophyceae was dominated and order of group wise phytoplanktonic abundance was Chlorophyceae > Bacillariophyceae > Cyanophyceae > Euglenophyceae, while among the zooplanktonic group the Cladocerans was most dominated and order of group wise zooplanktonic abundance was Cladocerans > Rotiferans > Protozoans > Copepods. During the seasonal period, different species of planktons were predominated in different seasons. The percentage composition of phytoplanktons recorded maximum during summer (43.47%), intermediate during winter period (34.78%) and minimum during rainy period (21.73%) while the percentage composition of zooplanktons recorded maximum (48.27%) in summer, intermediate (34.48%) in winter and minimum (17.24%) during the rainy period.