Abstract
A seasonal study was carried out on aquatic insect diversity of Kangsabati River at three sites, Gandhighat region (site-A), Kangsabati Rail bridge region (site-B), Vidyasagar park region (site-C) of district Paschim Medinipur, near Midnapore town, West Bengal. Nine species of aquatic insects were observed. The order Hemiptera was numerically the most abundant (78.60%), with seven species. Odonata constituted of 21.40% with Laccotrephes ruber being the dominant species. Ranatra elongata and Anax guttatus were similarly present. Five families are Notonectidae, Nepidae, Belostomatidae, Hydrometridae and Gerridae (Hemiptera), which constituted 6%, 75%, 6%, 2%, and 11%, respectively. Families Aeshnidae and Coenagrionidae of the order Odonata constituted 68% and 32%, respectively. Species diversity and evenness of sampling sites when compared, maximum was in site-A and the least in site-B.
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