Abstract

In this study, growth biology of chub [Squalius cephalus (Linnaeus, 1758)] population living in Istranca Brook has been studied. Sampling was carried out monthly in 6 sites on the stream by electrofishing between March 2012 and June 2013. Length, weight, age, sex distribution and ratios, age-length, age-weight, length-weight relationships, von Bertalanffy parameters, fulton condition factor values of S. cephalus individuals were investigated. Age distribution of the species varied between 0 and VII. Total length and weight values of all individuals varied between 2.6-30.1 cm and 0.14-352.50 g respectively. The femalemale ratio was 1:2.76. Length-weight relationship and von Bertalanffy growth parameters in all individuals were determined as W=0.0078TL3.15 and L∞, W∞, K and t0 as 42.18 cm, 1023.97 g, 0.137 and -0.576, respectively. Monthly fulton condition factor value in all individuals was lowest in February 2013 (0.908) and highest in June 2012 (1.222).

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