Life‐history traits of A phanius danfordii ( B oulenger, 1890) ( P isces: C yprinodontidae), endemic to K ızılırmak B asin ( T urkey)

Summary The life‐history traits of A phanius danfordii in H irfanlı R eservoir were studied on the basis of 2252 specimens caught between A pril 2008 and A pril 2009. Maximum age was determined as five years for both sexes. The overall sex ratio of males to females was 1 : 1.21; however, this ratio varied by age and season. Mean total length at age data derived from scale readings were used to estimate growth. The von Bertalanffy growth parameters were: L ∞  = 126.63 mm, K  =   −0.09, t 0  = 2.35 for females; and L ∞  = 61.2 mm, K  =   −0.19, t 0  = 2.76 for males. The gonadosomatic index ( GSI ) values indicated spawning to be from M ay to S eptember. Absolute fecundity varied from a minimum of 143 eggs for age one to a maximum of 698 eggs for age five. Relationships between fecundity–length and fecundity–weight were described by the equations: F  =   0.0002 TL 3.3222 and F  =   36.032 W 1.0053 , respectively. The equation of the relation between absolute fecundity and age was F  =   25.372 t 1.2343 .