Age, growth and mortality of Acanthobrama microlepis (De Filippi, 1863) from Lake Çıldır, Turkey

Abstract

This study was carried out in August-September 2014 and May 2015 in Lake Çıldır. A total of 229 specimens of Acanthobrama microlepis were used to determine some population parameters. The age of the specimens ranged from I to IV age groups and dominant age group was II. Total length varied from 7.6 to 24.2 cm with mean of 16.23±4.22 cm and total weight ranged from 3.68 to 123.46 g with mean of 42.70±33.24 g. The length-weight relationship were estimated as W = 0.0058L3.1199. The von Bertalanffy growth parameters, growth performance index and Fulton’s condition factor were calculates as L∞ = 38.37 cm, k = 0.193 year-1, to = -0.73 year, Φ = 2.45 and K = 0.75, respectively. Total mortality, natural mortality, fishing mortality and exploitation rates also estimated as Z = 0.50, M = 0.28, F = 0.22 and E = 0.44, respectively. In the light of these values it could not indicate any overfishing on population based on the exploitation rate.