The age and growth of Oxynoemacheilus bergianus were examined in 358 specimens collected monthly from Kordan River in 2013-2014. The total length range was 32.36–74.36 mm (50.95 ±10.3SD), and the total weight 0.31–4.06 g (1.12 ±0.68SD). The maximum age based on otolith readings was 5+ years for females and 4+ years for males. The most frequent age groups were 2+ and 3+ in males and females, respectively. The total length–weight relation for females was W = 0.0079TL2.99 (r2 = 0.92) and for males was W = 0.0093TL2.84 (r = 0.92), indicating an isometric pattern for females and a negative allometric growth for males. The Von Bertalanffy growth model was estimated as Lt = 86.9[1-e-0.16(t+3.1)] and Lt = 94.3[1-e-0.15(t+2.5)] for males and females, respectively. The growth performance index was estimated as 7.1 for males and as 7.2 for females, indicating a faster growth rate for females. The fastest growth rate for this species was in the first and second year of life.
کلید واژگان :Ageing; Alborz Province; growth pattern; Nemacheilidae
ارزش ریالی : 600000 ریال
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