Age and Growth of Rudd, Scardinius erythophthalmus (Linnaeus, 1758), in Ömerli Reservoir (İstanbul, Turkey)

Authors : Çiğdem Gürsoy Gaygusuz
Pages : 25-31
Doi:10.18864/ASE201805
View : 40 | Download : 8
Publication Date : 2018-01-06
Article Type : Research Paper
Abstract :In this study, 317 rudds insert ignore into journalissuearticles values(Scardinius erythrophthalmus insert ignore into journalissuearticles values(Linnaeus, 1758); were captured between March 2005 - January  2007 from Ömerli Reservoir and growth features such as age, growth and condition factor were investigated. The  age composition of rudd population varied between -0-8 years. Maximum number of rudds were 2 years of age. Females,  males, and juvenile composition of the population was 54.26%, 43.22%, and 2.2%, respectively. The total length  and weight of rudds varied between 6.8-29.0 cm and 3.4-392.7 g respectively. The von Bertalanffy growth equations  were Linsert ignore into journalissuearticles values(t); = 34.63[1-e−0.170 insert ignore into journalissuearticles values(t+1.327);], Winsert ignore into journalissuearticles values(t); = 574.31[1-e−0.170 insert ignore into journalissuearticles values(t+1.327);]3.15 ± 0.029 for males, Linsert ignore into journalissuearticles values(t); = 37.43[1-e−0.153 insert ignore into journalissuearticles values(t+1.371);], Winsert ignore into journalissuearticles values(t); = 847.58[1- e−0.153 insert ignore into journalissuearticles values(t+1.371);]3.28 ± 0.024 for females and Linsert ignore into journalissuearticles values(t); = 37.55[1-e−0.153 insert ignore into journalissuearticles values(t+1.389);], Winsert ignore into journalissuearticles values(t); = 819.23[1-e−0.153 insert ignore into journalissuearticles values(t+1.389);]3.2 4±0.017 for all specimens in the  Ömerli Reservoir. Length-weight relationship was calculated as W = 0.0066TL3.24±0.017 for all individuals. According to age  groups, condition factor varied between 1.121-1.678 for females and 1.172-1.724 for males, respectively.
Keywords : Age, growth performance, condition factor, rudd

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