Karasu Nehri’nde (Doğu Anadolu, Türkiye) yaşayan Chondrostoma regium (Heckel, 1843)’un bazı büyüme parametreleri

Bu çalışma, Karasu Nehri’nin 14 farklı istasyonunda yaşayan kababurun (Chondrostoma regium (Heckel, 1843))’un yaş tayini ve bazı büyüme özelliklerinin araştırılması ile ilgilidir. Bu amaçla, 2014 ve 2016 yılları arasında elektroşokerle toplam 236 C. regium balık örneği (124 dişi ve 112 erkek) yakalandı. Örneklenen C. regium bireylerinin total boy ve ağırlığı sırasıyla 11,0-33,0 cm ile 33,0-324,0 g arasında değiştiği görülmüştür. İncelenen bireylerin yaşlarının 1-7 arasında değiştiği görülmüş ve dişi:erkek oranı 1:0.903 olarak belirlenmiştir. von Bertalanffy büyüme parametreleri tüm bireyler için Lt=40,17[1-e-0,154(t+2,14)]; Wt=495,009[1-e-0,154(t+2,14)]2,50 ve büyüme performans indeks değeri (Ф') ise 2,395 olarak hesaplanmıştır. İncelenen populasyon için boy-ağırlık ilişkileri ise W=0,0503L2,50 (R² = 0,97; b’nin güven aralıkları=2,41-2,70; p<0,001) şeklinde bulunmuştur. Bu değerlere göre, C. regium’un büyüme tipinin negatif allometrik özellik gösterdiği görülmüştür.

Some growth parameters of Chondrostoma regium (Heckel, 1843) inhabiting Karasu River (East Anatolia, Turkey)

The present study was carried out in order to determine age and some growth parameters of brond snout (Chondrostoma regium (Heckel, 1843)) caught in 14 different stations from Karasu River (East Anatolia, Turkey). For this purpose, a total of 236 fish specimen (124 females and 112 males) of C. regium were captured between 2014 and 2016 by electroshocker. Total length and weight of C. regium ranged from 11.0 to 33.0 cm, 33.0 to 324.0 g, respectively. Female:male ratio was estimated as 1:0.903 and the age groups of C. regium were 1-7. The parameters of von Bertalanffy growth parameter estimated as Lt=40.17[1-e-0.154(t+2.14)]; Wt=495.009[1-e-0.154(t+2.14)]2.50 for combined sexes and the growth performance index (Ф') value was calculated as 2.395. The length and weight relationships were as follows: W=0.0503L2.50 (R² = 0.97; confidence intervals of b=2.41-2.70; p<0.001). The growth type was negative allometric.

Keywords:

Age, von Bertalanffy growth parameters, brond snout Karasu River, Turkey,

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