The study was conducted in Seyhan Dam Lake, Adana (April 2004 to March 2005). These factors included the length and sex distributions, age-lenght, weight, relationship, and condition factor according age and sex group of 157 roach taken from Seyhan Dam Lake. The dam lake had I-IV age groups with the dominant yer class (59.86%). The percentages of males/females in the population were 52.23%, 47.77% and 52.23% respectively. Rutilus rutilus’s fork length distribution was between 13.5 cm to 24 cm. The females weighed 34.41 g. and 260.4 g. While the males had W= 0.0894xL2.3521, and W=0.0293xL2.747 for all individuals, the growth equations for the females were W=0.0055xL3.318. Rutilus rutilus had an average condition factor of 1.404 +-0.26 in females and 1.472 +0.24 in males.