Diversity and relative abundance of aquatic insects of Dahaura Lake, Bahraich, U.P.

Abstract

A survey was carried out to study the aquatic entomofauna, their diversity and relative abundance in Dahaura Lake, a wetland is located in the Phakharpur Block of Bahraich district of Uttar Pradesh India during April 2023 to September 2023. A total of 296 individuals representing 25genera belonging to 20 families and 5 orders were recorded. Maximum of 155individuals of aquatic insects were recorded in in site S1 (Vegetation rich marginal area) of Lake and minimum of 45 individuals were recorded in the site 2 (With poor vegetation central area of lake). Insects belonging to the orders Hemiptera showed higher species richness (51.35%) followed by those belonging to Coleoptera (21.96%), Odonata (13.51), Diptera (10.47%) and Ephemeroptera (2.70%). Dominance of hemipteran and coleopteran insects suggested that Dahaura lakes of Bahrich is relatively less polluted.