Some Growth Characters of Tench (Tinca tinca L., 1758) in Lake Yeniçağa, Bolu, Turkey

Abstract

This study provided basic information on the population structure and some growth characteristics of tench (Tinca tinca L., 1758) in Lake Yeniçağa. A total 291 tench were sampled between March 2009 and July 2010. The age of sampled tench ranged from I to IX. The ratios of male and female in this population were 60.5% and 39.5%, respectively. Fork-length and weight ranged from 10.9 cm to 41.5 cm and from 24.0 g to 1127.2 g, respectively. For all individuals, von Bertalanffy growth parameters were determined as L∞ = 44.19 cm, W∞ = 1304.46 g, k
= 0.236, t0 = -0342, and b = 2.999. Relation between length and weight was calculated as W = 0.015 FL2.999. Mean condition factor was calculated as 1.55 ± 0.01