Seasonal variations of zooplankton community in freshwater reservoir Bijapur district, Karnataka, South India

In the present work, we provide quantitative information on the seasonal variations of zooplankton and selected physico-chemical variables a large man-made reservoir in the Bijapur district. In the study period we have recorded 24 species of which, 10 species belongs to rotifera, 6 species belongs to cladocera, 5 species belongs to copepoda and 3 species of ostracoda. Among zooplankton, particularly rotifera was the dominant group throughout the study period and highest count was recorded in the summer season while low incidence was observed in southwest monsoon season. Zooplankton community is also correlated with physicochemical parameters. The results indicate that the distribution and density of zooplankton species influenced by physical and chemical factors of the environment.