Tarım Bilimleri Dergisi Tar. Bil. Der. Dergi web sayfası: www.agri.ankara.edu.tr/dergi Journal of Agricultural Sciences Journal homepage: www.agri.ankara.edu.tr/journal TARIM BİLİMLERİ DERGİSİ — JOURNAL OF AGRICULTURAL SCIENCES 22 (2016) 422-432 Density and Biomass of Fish Populations in Kirmir Stream of Sakarya River, Turkey Özge ZENCİR TANIR a , A. Şeref KORKMAZ b a Erzincan University, Kemah Vocational School, Erzincan, TURKEY b Ankara University, Faculty of Agriculture, Department of Aquaculture and Fisheries Engineering, Ankara, TURKEY ARTICLE INFO Research Article Corresponding Author: Özge ZENCİR, E-mail: zencir06@hotmail.com, Tel: +90 (546) 447 06 77 Received: 02 February 2015, Received in Revised Form: 26 March.2015, Accepted: 30 March 2015 ABSTRACT In this study, Zippin’s triple-catch removal method was used to estimate density and biomass of fsh species in Kirmir Stream of Sakarya River, Central Anatolia Turkey. A total area of 1.5256 ha was sampled and 4167 fshes were caught using electrofshing between February 2007 and November 2007. A total of 9 fsh species representing 2 families Cyprinidae and Cobitidae were recorded. Fish species identifed are as follows: Chub (Leuciscus cephalus Linnaeus, 1758), barbel (Barbus plebelejus escherichi Heckel, 1843), Capoeta tinca Heckel, 1843, spirlin (Alburnoides bipunctatus Bloch, 1782), Capoeta capoeta sieboldi Steindachner, 1864, tirgis-nase (Chondrostoma regium Heckel, 1843), bleak (Alburnus orontis Sauvage, 1882), spined-loach (Cobitis taenia Linnaeus, 1758) and angora-loach (Noemacheilus angorae Steindachner, 1897). A. orontis was the most dominant species, constituting 1199 fsh and 28.77% of the total fshes, followed by C. tinca (1173 fsh and 28.15%), B. p. escherichi (584 fsh and 14.01%), L. cephalus (454 fsh and 10.90%), A. bipunctatus (322 fsh and 7.73%), C. regium (245 fsh and 5.88 %), N. angorae (107 fsh and 2.57%) C. c. sieboldi (65 fsh and 1.56%) and C. taenia (18 fsh and 0.43%). The density and biomass values were estimated as 11456 fsh ha -1 and 346.78 kg ha -1 in February 2007, 8982 fsh ha -1 and 279.82 kg ha -1 in May 2007, 6320 fsh ha -1 and 251.52 kg ha -1 in August 2007 and 2887 fsh ha -1 and 168.87 kg ha -1 in November 2007, respectively. The lowest density and biomass values were observed in November 2007. Keywords: Density; Biomass; Electrofshing; Kirmir stream; Ankara; Turkey Sakarya Nehri’nin Kirmir Çayı’ndaki Balık Populasyonlarının Yoğunluğu ve Biyoması ESER BİLGİSİ Araştırma Makalesi Sorumlu Yazar: Özge ZENCİR, E-posta: zencir06@hotmail.com, Tel: +90 (546) 447 06 77 Geliş Tarihi: 02 Şubat 2015, Düzeltmelerin Gelişi: 26 Mart 2015, Kabul: 30 Mart 2015 ÖZET Bu çalışmada, İç Anadolu Bölgesi’ndeki Sakarya Nehri’nin Kirmir Çayı’nda balık türlerinin yoğunluk ve biyomas değerlerini tahmin etmek için üç avlı ayrılmaya dayalı metot kullanılmıştır. 1.5256 ha’lık alanda örnekleme yapılmış ve