We collected the specimens of Turcinoemacheilus hafezi throughout the
spawning season (January to July, 2012) in Beshar River (south-west Iran) and
investigated its age, growth, and reproductive characteristics. The maximum age was
2+ years. Total length and weight of the specimens ranged from 29 to 61 mm and
0.17 to 1.39 g, respectively. Length-weight relationship was estimated as W = 3E-
05TL2.57 for females, W = 3E-06TL3.22 for males and W = 1E-05TL2.88 for the
population. Sex ratio was 1:1.1 in favor of males. The growth model was isometric
for males and sexes combined and negative allometric for females. Based on the
gonadosomatic index (GSI) values, spawning appears to occur between late
February and late April in Beshar River. The highest mean GSI was 6.73 for males
and 14.50 for females in April. The absolute fecundity ranged 42–726 with a mean
of 184.87 eggs. Fecundity was also positively correlated with fish size (length and
weight). Egg diameter ranged from 0.4 to 1.6 mm with a mean of 0.84 mm.
