Fish Structural Community in Tigris River, Mosul City, Iraq

Abstract

Fish species content structure of Tigris river crossing Mosul city had been studied from Al-Rasheadiea region noruthly to Nivava bridge in the south with classification index for the species ,genius ,and families depending on morphological and dissecting and rays in different fins, the number of scales above and down lateral line, pharyngeal characteristics such as barbells number, total length, standard length, spines teeth number, gill rackers and the number of serrates in dorsal spine. There are 22 species related to 16 genius of 8 families, of them 15 species were related to cyprinidae family and the Chondrostoma regius species was the dominant among the caught during this study.