Evaluating the Use of Otolith Shape Analysis to Identify the Spatial Stock Structure of Seabream, Diplodus annularis (Sparidae)
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Melek Ozpicak
[1]
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Sevim Akkaya
[2]
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[1] Ondokuz Mayıs University
Ondokuz Mayıs University
Turquía
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[2] Ordu, Türkiye
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- Localización: Thalassas: An international journal of marine sciences, ISSN 0212-5919, Vol. 41, Nº. 2 (June 2025), 2025
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
Otoliths are hidden boxes that form the basis of fshing studies and record all the characteristics of the life histories of fsh. Otolith morphometry and shape analysis are used to efectively distinguish fsh stocks from each other. The present study deals with the discrimination of D. annularis stocks from the Aegean Sea, Black Sea and Mediterranean Sea coasts of .Türkiye using the otolith morphology and otolith shape analysis. In this study, a total of 169 Diplodus annularis samples were collected from three important seas between September 2023 and March 2024. No signifcant diferences were found between the left and right otoliths as well as between otoliths of males and females (p > 0.05). Sagittal otoliths were subjected to shape indices, elliptic Fourier analysis, and wavelet analysis for stock discrimination. Among the three methods, WT was determined as the most efective discrimination method with an overall 62.7% classifcation success. The results of the discrimination between the samples for these three methods showed diferences, but in general, the otoliths of seabream in the studied stocks did not difer signifcantly in terms of both shape indices and Fourier coefcients, while the results of WT supported the view that stocks could be separated using otolith shape (PERMANOVA, p = 0.0001).
