Length-Weight Relationship, Condition Factor, and Gonadosomatic Index of Endemic Alburnus istanbulensis (Battalgil, 1941) in Two Different Habitats: Karamenderes River and Bayramiç Reservoir (Çanakkale, Turkey)

Objective: The first aim of this study is to describe the length, weight, condition factor, and GSI Alburnus istanbulensis (Battalgil, 1941) in two different connected habitats (stream habitat reservoir lake) Karamenderes River, Çanakkale. second state growth type species sampled using length-weight relationship (LWR) model. Materials Methods: sampling areas are Bayramiç Reservoir tributaries on which feed reservoir. Sampling was conducted between May 2016 June 2017, depending types, gears were used samplings. W=aLb equation calculate relationship, K=100×W/L3 for GSI=WG×100/W gonadosomatic index. Results: results showed that mean fork length specimens stream 11.86±1.83 cm 7.69±3.56 cm, respectively, body weight 19.28±8.99 g 8.17±10.82 g, respectively. factor higher values habitats. all positive allometric (b=3.13), whereas isometric (b=2.99) (b=3.12). Conclusions: Determining biological characteristics an endemic makes important contribution conservation species. In Çanakkale region, data LWR, growth, condition, not available with valid name Therefore, terms presenting new region findings indicate A. exhibited habitat-dependent differences condition.