Diversity of aquatic insects in the euphrates River/ Najaf province-Iraq

Abstract

Five locations were sampled with three duplicates from each throughout the course of a six-month period, from November 2021 to April 2022, in order to assess the biodiversity of crustaceans. Water was also included in the samples. Certain chemical and physical characteristics of water are measured. the overall density of aquatic insects varied from (1–257) individuals/L, the month of April had the greatest density. According to the findings of the isolation and identification of water insects, Chironomidae larvae were the most numerous throughout the research period, followed by Chironomide pupa, Zygoptera nymph, Odonata larvae, and Belostoma corodofanum. According to the relative abundance index for aquatic insects, the Zygoptera nymph species was most prevalent in the first location, whereas Chironomidae larvae were more prevalent in the other sites. The constancy species index (S) of aquatic insects, Chironomidae larvae and Chironomide pupa, were the most constancy across all research locations and throughout the course of the study period. The values of the species richness index (D*) ranged from 0-3.84.While the Shanon-Weiner index ranged between 0-1.361 bit/ind. While the values of the species uniformity index (E) ranged between 0-0.845.