Length–Weight, Length–Length Relationships and Condition Factor of Chondrostoma regium (Heckel, 1843) and Barbus lacerta, Heckel, 1843 From Karasu River (East Anatolia, Turkey)

Length–weight, length–length relationships and condition factors were estimated for twofish species (Chondrostoma regium, Barbus lacerta) caught between October 2014 andSeptember 2015 in the 14 distinct locations of Karasu River, East Anatolia, Turkey.Minimum and maximum total length and weight were observed at 7.5 to 31.0 cm andfrom 5.7 to 280 g for C. regium, 7.0 to 24.0 cm and from 4.0-211 g for B. lacerta. The bvalues determined as 2.77 for Chondrostoma regium; 3.10 for Barbus lacerta. The typesof growth were found negative allometric for C. regium and isometric growth for B.lacerta. The length-length relations between total, fork, and standard lengths for the twofish species were highly significant. The relative condition factor values were found to1.102±0.013 for C. regium; 1.176±0.019 for B. lacerta. This study submits for the firsttime LWR, LLR and condition factor of two species in the Karasu River.