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¹ Akdeniz University, Department of Science Education, Faculty of Education, Antalya, Turkey DOI : 10.4194/1303-2712-v20_3_01 Viewed : 2753 - Downloaded : 2516 The relationships between asteriscus otolith morphology (OL, OW, OR and OM) and fish total length were described with a non-linear function (power model) for seven Cyprinid fish species: Capoeta angorae, C. antalyensis, C. caelestis, C. erhani, C. pestai, Pseudophoxinus antalyae and P. fahrettini. These species are endemic to Turkey and have limited distributions. The regression models are quite well fitted with all asteriscus otolith measurements. We were also conducted the regression models for genus level. There was no significant difference between the size of the left and right otoliths (paired t-test) in any of the seven species. This is the first study that examines the relationships between asteriscus otolith morphology and fish total length for four Cyprinid species. These results showed that the equations generated to obtain the fish size using otolith morphology data can be used in dietary studies. Keywords : Cyprinid fish, Asteriscus otolith, Freshwater, Biometric relation