Density, Biomass and Length-Weight Relationship of Brown Trout (Salmo trutta Linnaeus, 1758) Population in the Çoruh River Basin, North-Eastern Anatolia, Turkey
Open Access
- 27 December 2017
- journal article
- Published by Journal of Limnology and Freshwater Fisheries Research in Journal of Limnology and Freshwater Fisheries Research
- Vol. 3 (3), 129-136
- https://doi.org/10.17216/limnofish.313520
Abstract
Tr en Bu çalışma, tek avlı ayrılmaya dayalı metot uygulanarak avlanan kırmızı benekli alabalığın (Salmo trutta Linnaeus, 1758) yoğunluk, biyokütle ve boy-ağırlık ilişkisini belirlemek için yürütülmüştür. Toplam 2,1760 ha alan, Kuzey Doğu Anadolu Çoruh Nehri Havzası’nın Tortumkale Çayı’nda; Mayıs 2012-Haziran 2013 tarihleri arasında elektroşokla 167 adet balık avlanmıştır. Ortalama yoğunluk ve biyomas değerleri sırasıyla 106-167 adet/ha ve 4,76-10,64 kg/ha arasında değişmiştir. Boy-ağırlık ilişkisinin b değerleri 3.0672-3.3158 arasında değişmiş ve pozitif allometrik büyüme gözlemlenmiştir. İstasyonlar arasındaki boy-ağırlık ilişkisi istatistikî olarak önemlidir (r2>0,9917, pSalmo trutta Linnaeus, 1758) caught from removal method based on single-pass electro fishing. A total area of 2.176 ha was sampled and 167 fishes were caught using electro fishing between May 2012 and June 2013 in Tortumkale Stream of Çoruh River, Turkey. Mean density and biomass of brown trout were found to vary between 106-167 fish ha-1 and 4.76-10.64 kg ha-1, respectively. The length-weight relationship exponent b values ranged from 3.0672 to 3.3158 and indicated positive allometric growth. Length-weight relationship in between stations were statistically significant (r2>0.9917, pOncorhynchus mykiss), aquacultures activities, recreational fisheries, barriers of dam construction and irrigation canals, pollution from domestic, industrial and agricultural waste contribute to the destruction of the habitat of brown trout.Keywords
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