Turkish Journal of Water Science and Management 2536-474X 2564-7334 Tarım ve Orman Bakanlığı Su Yönetimi Genel Müdürlüğü 10.31807/tjwsm.1067360 Length-Weight Relationships and Condition Factors of Eight Exotic Fish Species from Turkey Çiçek Erdoğan NEVŞEHİR HACI BEKTAŞ VELİ ÜNİVERSİTESİ Seçer Burak NEVSEHIR HACI BEKTAS VELI UNIVERSITY, INSTITUTE OF SCIENCE https://orcid.org/0000-0003-4018-6375 Sungur Sevil NEVŞEHİR HACI BEKTAŞ VELİ ÜNİVERSİTESİ, SAĞLIK HİZMETLERİ MESLEK YÜKSEKOKULU https://orcid.org/0000-0001-8649-9452 Eagderi Soheil Bahçeci Hümeyra 07 25 2022 6 2 260 274 02 02 2022 06 13 2022 Copyright © 2017, Türkiye Su Bilimi ve Yönetimi Dergisi 2017 Türkiye Su Bilimi ve Yönetimi Dergisi

Length-weight relationships (L-WRs) and condition factors were estimated for eight exotic fish species, including Oreochromis niloticus, Coptodon zillii, Carassius auratus, C. gibelio, Pseudorasbora parva, Gambusia holbrooki, Lepomis gibbosus, and Oncorhynchus mykiss from 10 basins of Turkish inland waters. A total of 1958 specimens were sampled in the years of 2014, 2017, 2018, and 2019 from 29 populations and their LWRs parameters, and form, Fulton’s, relative and mean condition factors were estimated. The estimated values of the parameter b ranged from 2.732 (C. auratus) to 3.319 (C. gibelio) with the mean and median values estimated at 3.013 and 3.047, respectively. The R2 values varied from 0.753 to 0.998, indicating a high degree of positive relationship between length and weight. The Fulton’s condition factor was estimated as 0.882 for P. parva and 2.002 for L. gibbosus. with the mean and median values of 1.397 and 1.453, respectively. This situation reveals that the condition values of all alien species except P. parva are quite high. In addition, the condition factor values of exotic fish species and local species they live with in Çıldır Lake were compared. As a result of this comparison, it was determined that C. gibelio had the highest condition factor value.

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