Ichthyofauna of the Iranian part of the Sirvan River drainage with the first record of Cobitis avicenna and Oxynoemacheilus euphraticus

This study investigated the fish diversity of the Sirvan River drainage, Tigris River basin. Sampling was performed at 20 stations during 2020-2021 using an electrofishing device. A total of 32 species in 23 genera, 12 families and seven orders, including Barbus lecerta, Capoeta damascina, C. trutta, C. umbla, Carassius gibelio, Cyprinion macrostomum, C. kais, Garra rufa, Luciobarbus barbulus, Cyprinus carpio (Cyprinidae), Ctenopharyngodon idella, Hypophthalmichthys molitrix, H. nobilis, Hemiculter leucisculus (Xenocyprididae), Cobitis avicennae (Cobitidae), Oxynoemacheilus euphraticus, O. zarzianus, O. kurdistanicus, O. parvinae, Turcinoemacheilus kosswigi, Paracobitis molavi (Neomacheilidae), Squalius berak, S. lepidus, Alburnus sellal, A. hohenackeri (Leuciscidae), Pseudorasbora parva (Gobionidae), Rhinogobius lindbergi (Gobiidae), Esox lucius (Esocidae), Mastacembelus mastacembelus (Mastacembelidae), Glyptothorax pallens (Sisoridae), Oncorhynchus mykiss (Salmonidae) and Gambosia holbrooki (Poeciliidae) were recorded. Carassius gibelio, C. idella, C. carpio, H. molitrix and H. nobilis, A. hohenackeri P. parva, H. leucisculus, O. mykiss, R. lindbergi, E. lucius and G. holbrooki were exotic species introduced to this river system. This study confirms the new records of O. euphraticus and C. avicennae for the first time from the Iranian part of the Sirvan River drainage.