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

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