Age and Growth Parameters of Chub (Squalius anatolicus (Bogutskaya, 1997) in Oymapinar Dam Lake (Antalya), Turkey

Abstract

This study aimed to determine some biological parameters such as age, growth condition factor, length-weight relationship, and sex ratio of Beysehir daces (Squalius anatolicus) sampled from Oymapınar dam lake between March 2016 and February 2017. A total of 422 Beysehir daces were sampled using 100 m long and 2,5 m depth monofilament gillnets (20, 30, 40, 50 mm mesh size) from the Oymapınar dam lake. The ages of the Beysehir daces ranged between II and VIII. The oldest age for females was VIII and VII for males. The sex composition of the sampled fish showed that 47.39 % of the samples were females and 52.61% were males. It was determined that the fork lengths of the females varied between 20.0 cm and 55.1 cm and the weights varied between 93.37 g and 2307.88 g. Von Bertalanffy growth parameters for all individuals were determined as L∞ = 60.57 cm, W∞ = 3260.79 g, k = 0.160 and t0 = -0.877 The b values of the length-weight relationship for females, males and all individuals were 3.202, 3.185 and 3.194, respectively. The average condition factor (CF) for all individuals was calculated as 1.278 ± 0.006. The findings of this study will aid in the development and implementation of longterm management plans for the Beysehir dams in this lake, as well as serve as the foundation for future research on the biological parameters of fish living in this lake.