In this study, the stomach contents of 160 Rudd (Scardinius erythrophthalmus L., 1758) collected from Samsun-Bafra Fish Lakes (Tatlı Lake and Gıcı Lake) between January, 2000 and December, 2000 were investigated. The purpose of this research is to establish whether the dietary preferences of Rudd (Scardinius erythrophthalmus L., 1758) change on account of age and/or seasons. Food items were examined in accodance with the Geometric Index of Importance (GII) method. The results obtained from this index were also evaluated in relation to seasonal and age-dependent variables. It was observed that dietary preferences of Rudd (Scardinius erythrophthalmus L., 1758) do not change with age and the seasons.  Key Words:Age, Food Preference, Geometric Index of Importance (GII), Rudd (Scardinius erythrophthalmus L., 1758), Bafra Fish Lakes (Tatlı Lake and Gıcı Lake)