A study on zooplankton biodiversity of kangsabati reservoir, W. B., India

A study on zooplankton diversity of Kangsabati Reservoir was conducted to check the reservoir status and emerge new insights which harbors in it. Shannon-Weaver diversity index, Margalef ,s richness index, Pielou evenness index, Index of dominance were evaluated on zooplankton from Kangsabati Reservoir. A total of 78 species were found in this reservoir. Among these, it comprises 33 species of rotifera, 22 species of cladocera, 16 species of copepoda, 4 species of protozoa, 2 species of ostracoda, 1 species of amphipoda. The highest and lowest value of Shannon index were 3.97 and 2.85 respectively. The species richness ranged in between 9.587 to 6.380 while evenness value was 0.75 to 0.99. The index of dominance varied from 0.221 to 0.485. The species diversity was maximum in the winter month i.e. November, 2010 and minimum in summer month i.e. May, 2010. Among the rotifers, Brachionus sp., Keratella sp., Synchaeta sp., Asplanchna sp. were dominant where as Daphnia sp., Ceriodaphnia sp., Bosmina sp., Alona sp. were dominant among the cladoceran. On the contrary Naupli, paracyclops sp., Microcyclops sp. among the copepoda; Difflugia sp. and Amoeba sp. among the protozoan; Cyprinotus sp. among the ostracoda were rich in number. The occurrence of amphipod was seen in the month of summer season. The maximum diversity was observed in rotifera group in comparison to amphipoda group which was minimum.