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

Year 2016, Volume: 29 Issue: 1, 1 - 5, 11.07.2016

Nurcihan Çakır Erdoğan Çiçek Burak Seçer Sevil Birecikligil

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.

Keywords

Acanthobrama microlepis, Blackbrow bleak, Caucasian bream, Lake Çıldır, Population parameters, Mortality rates

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