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1 Oceanological and Hydrobiological Studies

1 2023

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Biometric relation between body size and otolith size of Cyprinion kais and C. macrostomum collected from Tigris River, Şirnak Province, Türkiye

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Dörtbudak M. Y. , Jawad L. A. , Yalçin H. , Park J. M.

tom Vol. 52, No. 2

221-227

One hundred and twenty asterisci were obtained from 30 specimens each of Cyprinion kais and Cyprinion macrostomum. Significant relationships between otolith mass and the three fish lengths (TL, SL, and FL) were attained for C. kais. Similar associations were obtained for OL and the three fish lengths of C. macrostomum. For C. kais,the highest in the relation between otolith mass, hereafter referred to as OM, and fish fork length, henceforth knownas FL (0.5894). The lowest coefficient of determination wasobserved between otolith width, hereafter called OW, and standard fish length, hereafter referred to as SL (0.2861). For C. macrostomum, the highest coefficient of determination was attained for the relation between OL and FL (0.7280) and the lowest for the relationship between OM and TL (0.1717).The analysis shows that evaluations of the body size of the two fish species investigated through biometric studies ofotoliths are trustworthy.