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¹ Mehmet Akif Ersoy University, Faculty of Science and Literature, Biology Department, Burdur-Turkey
² Süleyman Demirel University, Eğirdir Fisheries Faculty, East Campus 32100 Isparta- Turkey DOI : 10.4194/1303-2712-v17_5_02 Viewed : 4345 - Downloaded : 3276 In this research, the current systematic status of endemic Anatolian species, Alburnus nasreddini, has been enlightened by making its morphological description and comparing it with the closest species, A. escherichii. This species has distinguished from the closest species, A. escherichii, by fever perforated scales along lateral line (44-48 vs. 46-53), dipper body depth (26.64 vs. 23.92% SL), shorter snout (25.54 vs. 27.55% HL) and larger eye diameter (31.22 vs. 27.88% HL). Our study has also examined the distribution area and habitat conditions of the species, clearly indicating that A. nasreddini distributed in only Akarçay basin (Eber, Akşehir and Karamık lakes; Selevir and Seyitler reservoirs; Kalli, Adıyan and Akşehir creeks) and Ilgın Lake Basin (Beşgöz Springs-Sarayönü, Aşağı Çiğil Creek-Ilgın). Its observable population until very recently has disappeared from its type locality, Eber Lake, due to heavy pollution. Although its population present in Akşehir Lake is critically endangered due to the drought, presence of viable population in some dam lakes (especially in Selevir Reservoir) is considered as a promising picture with regard to the future of species. Keywords : Akarçay Basin, inland fish fauna, Nasreddin bleak, taxonomy