Journals / Su Ürünleri Dergisi / 2014 / Cilt: 31 - Sayı: 2
Age, growth and otolith morphometry of Capoeta angorae (Cyprinidae) collected from Menzelet Reservoir and Fırnız Stream (Turkey)
- Journal
- Su Ürünleri Dergisi
- Pages
- 79–85
- DOI
- —
Abstract
Age, growth rates and otolith morphometry of Capoeta angorae, collected by using electro shocker, were determined from the Fırnız Stream and Menzelet Reservoir between August 2011 and November 2012. A total of 175 otoliths were obtained from C. angorae that ranged between 7.5 and 27.0 cm L were used in the analysis. The overall male : female ratio (M : F = 1.52 : 1.00) was biased in favour of males. Student's t-test revealed significant differences between sexes, regarding total length (P < 0.05). The length-weight relationships were calculated as W= 0.0128L2.8703 (R2= 0.975) for females, W = 0.0103L2.9462 (R2 = 0.969) for males and W = 0.0097L2.9629 (R2 = 0.978) for all specimens. Otolith length (OL), width (OW) and radius (OR) were ranged between 1.67 - 3.45 mm, 1.39 - 2.82 mm and 0.89 - 1.70 mm, respectively. The von Bertalanffy growth models were L? = 27.55 cm (L), K = 0.465 (year-1), t0 = -0.539 (year), females; L? = 22.84 cm (L), K = 0.772 (year-1), t0 = -0.71 (year) males; L? = 42.25 cm (L), K = 0.102 (year-1), t0 = -2.84 (year) for all specimens. The otolith morphometric measurements (OL, OW and OR) showed significant linear relationships with the total length. No significant differences were found between observed age and predicted ages of the C. angorae estimated from the OL, OW and OR (Mann-Whitney U test; P > 0.05).
Özet
Menzelet Barajı ve Fırnız Çayı'ndan Ağustos 2011 ve Kasım 2012 tarihleri arasında elektro-şoker ile yakalanan Capoeta angorae bireylerinin yaş, büyüme oranları ve otolit (asteriskus) morfometrik ölçümleri belirlenmiştir. Toplam boy (L) aralığı 7.5 ile 27.0 cm arasında olan C. angorae bireylerinden elde edilen toplam 175 adet otolit analizlerde kullanılmıştır. Toplam erkek : dişi oranı (E : D = 1.52 : 1.00) erkekler lehine eğimlidir. Student's t-test cinsiyetler arasında boy farklılığının istatistiksel olarak önemli olduğunu göstermektedir (P 0.05).