Zooplankton collection, Preservation and Identification: Qualitative and quantitative Zooplankton analysis of the reservoir was done for the same period. From each spot 100 litre of water samples was filtered through plankton net of bolting
silk No.25 (mesh size 64 micrometer). All the filtered content was then transferred to 100 ml glass container. 4% formalin and few drops of glycerin were added to it. Supernatant plankton free water was removed and sedimentary zooplankton was counted by Sedgewick-Rafter cell method – Adoni12. Identification of zooplankton was done under microscope using keys and monographs of Edmondson13, Battish14, Needham and Needham15, Sharma16 and with the help of experts of Zoological Survey of India, Kolkata.