This study was done to determine age and sex distributions, as well as length, weight, and relationship relationships between age and sexes, based on the sex groups of 164 Chondrostoma Regium (Heckel),1843, which were caught from Seyhan Dam Lake in Adana (April 2007 to March 2008). The age range of individuals was I-IV. Males and females were constituted at 54.40% and 45.60%, respectively. The dominant age group for all individuals was the first, at 60.60%. The total length and weight of the individuals was 14.29cm, 24.50cm, 33.40g and 128.00g respectively. The age-length and age-weight relationships in females and males were estimated as; Lt= 29.83[1-e-0.2626(t+1.9844)], Wt= 230.20[1-e-0.2626(t+1.9844)]2.4507 and Lt= 26.85[1-e-0.2548(t+1.6296)], Wt= 197.32[1-e-0.2548(t+1.6296)]2.6995 respectively. All individuals had a length-weight relationship of W=0.0327 and L2.64 (r=0.964). The minimum condition factor value was found in the age group III.