Some Biological Parameters and Otolith–Fish Size Relationships of the Endemic Alburnoides kurui Turan, Kaya, Bayçelebi, Bektaş & Ekmekçi, 2017 from the Tersakan Stream, Northern Anatolia

Authors : Sefa Bozkurt, Savaş Yılmaz

Pages : 129-137

Doi:10.17216/limnofish.1793389

View : 46 | Download : 107

Publication Date : 2025-12-30

Article Type : Research Paper

Abstract :This study aims to examine the sex ratio, length and weight distribution, length–weight relationship, condition factor, and otolith morphometric relationships of the endemic freshwater fish Alburnoides kurui from the Tersakan Stream in Northern Anatolia. A total of 102 specimens were collected in November 2024 using electrofishing. The sample comprised 42 females, 46 males, and 14 individuals of undetermined sex, showing an approximately equal sex distribution. Total length ranged from 4.9 to 11.3 cm, and body weight from 0.92 to 15.62 g. Length–weight relationships were analyzed separately by sex, with allometric coefficients (b) ranging from 2.97 to 3.27; females exhibited positive allometric growth, whereas males showed isometric growth. Fulton’s condition factor (K) and relative condition factor (Kr) varied by sex and size class, with females generally displaying higher and more variable Kr values. Strong relationships were observed between otolith measurements and fish length, with different otolith axes showing either isometric or allometric growth patterns, suggesting that different otolith axes are reliable predictors of fish size. This study represents the first comprehensive investigation of the biological traits and otolith morphometric relationships of A. kurui. Additionally, the observed maximum total length of 11.3 cm and weight of 15.62 g represent new maximum recorded values for the species.
Keywords : Alburnoides kurui, endemik balık, boy–ağırlık ilişkisi, kondisyon faktörü, otolit morfometrisi

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