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Investigation of Fluctuating Asymmetry in the Sagittal Otoliths of Saurida lessepsianus Russell, Golani & Tikochinski, 2015 Population on the Northeastern Mediterranean (Gulf of Iskenderun) Coasts

Kuzeydoğu Akdeniz (İskenderun Körfezi) Saurida lessepsianus Russell, Golani & Tikochinski, 2015 Popülasyonunun Sagittal Otolitlerinde Dalgalı Asimetrinin Araştırılması

Serdar Yedier(ORDU ÜNİVERSİTESİ, FEN-EDEBİYAT FAKÜLTESİ)0000-0003-0017-3502
Seda Kontaş Yalçınkaya(ORDU ÜNİVERSİTESİ, FATSA DENİZ BİLİMLERİ FAKÜLTESİ)0000-0002-6582-6722
Derya Bostancı(ORDU ÜNİVERSİTESİ, FEN-EDEBİYAT FAKÜLTESİ)0000-0003-3052-9805
Nazmi Polat(ONDOKUZ MAYIS ÜNİVERSİTESİ, FEN-EDEBİYAT FAKÜLTESİ, BİYOLOJİ BÖLÜMÜ, BİYOLOJİ PR.)0000-0001-9785-9927
Pages
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Publication Date
2026-10-07
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The high number of individuals with asymmetrical otoliths in the S. lessepsianus population suggests that the individuals may be under stress.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Fluctuating asymmetry is defined as random, minor deviations from an organism’s bilateral perfect symmetry.
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Key Findings & Data:The aim of this study was to investigate the fluctuating asymmetry in the sagittal otoliths of the Saurida lessepsianus Russell, Golani & Tikochinski, 2015 population inhabiting the Gulf of Iskenderun.
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Conclusion & Impact:The high number of individuals with asymmetrical otoliths in the S. lessepsianus population suggests that the individuals may be under stress.
🔬Design:Araştırma Makalesi
📍Scope:2015 Verileri
⚙️Variables:dalgalı asimetri · İskenderun Körfezi · sagitta

Abstract

Fluctuating asymmetry is defined as random, minor deviations from an organism’s bilateral perfect symmetry. Fluctuating asymmetry, which can occur in the bilateral characteristics of fish in response to environmental stress, is used to assess stress and developmental stability. The aim of this study was to investigate the fluctuating asymmetry in the sagittal otoliths of the Saurida lessepsianus Russell, Golani & Tikochinski, 2015 population inhabiting the Gulf of Iskenderun. The sagittal otolith pairs of S. lessepsianus individuals (n=63), divided into seven total length groups, were measured, and levels of fluctuating asymmetry, named the square of the coefficient of variation for asymmetry (CVa²) for otolith length (OL) and width (OW), were assessed. A statistically significant difference was detected between the left and right otolith width values of fish individuals (P < 0.05). The highest asymmetry value for OG was 7.325 in IV. length group, and the lowest asymmetry value was 0.214 in I. length group. The highest asymmetry value for OB was 1.964 in III. length group, and the lowest asymmetry value was 0.296 in II. length group. The relationships between total length (TB) and (CVa²) values were calculated as y = 0.2582x – 2.56 for OG and y = 0.0326x + 0.4259 for OB. Climate change and human activities in the Mediterranean Sea are negatively impacting the ecosystem. The high number of individuals with asymmetrical otoliths in the S. lessepsianus population suggests that the individuals may be under stress.

Özet

Dalgalı asimetri; bir organizmanın iki taraflı mükemmel simetrisinden rastgele ve küçük derecede sapmalar olarak tanımlanır. Çevresel stresle birlikte balığın iki taraflı özelliklerinde oluşabilen dalgalı asimetri, stresin ve gelişimsel istikrarın tespiti amacıyla kullanılmaktadır. Bu çalışmada, İskenderun Körfezi’nde yaşayan Saurida lessepsianus Russell, Golani & Tikochinski, 2015 popülasyonunun sagittal otolitlerindeki dalgalı asimetrinin incelenmesi amaçlanmıştır. Yedi boy grubuna ayrılan S. lessepsianus (n=63) bireylerinin sagital otolit çiftleri ölçülmüş, otolit boyu (OB) ve genişliği (OG) için asimetri değişim katsayısının karesi (CVa2) olan dalgalı asimetri düzeyleri değerlendirilmiştir. Balık bireylerinin sol ve sağ otolit genişliği değerleri arasında istatistiksel olarak anlamlı bir fark tespit edilmiştir (P<0,05). OG için en yüksek asimetri değeri IV. boy grubunda 7,325 ve en düşük asimetri değeri ise I. boy grubunda 0,214 olarak tespit edilmiştir. OB için en yüksek asimetri değeri III. boy grubunda 1,964 ve en düşük asimetri değeri ise II. boy grubunda 0,296 olarak tespit edilmiştir. Total boy (TB) ve (CVa2) değerleri arasındaki ilişkiler OG için y = 0,2582x - 2,56; OB için y = 0,0326x + 0,4259 olarak hesaplanmıştır. Akdeniz'deki iklimsel değişiklik ve insan faaliyetleri bölgedeki ekosistemi olumsuz yönde etkilemektedir. S. lessepsianus popülasyonunda asimetrik otolite sahip birey sayısının fazla olması, bireylerin stres altında olabileceğini göstermektedir.

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Cite This Article

Yedier, S., Yalçınkaya, S. K., Bostancı, D., Polat, N. (2026). Investigation of Fluctuating Asymmetry in the Sagittal Otoliths of Saurida lessepsianus Russell, Golani & Tikochinski, 2015 Population on the Northeastern Mediterranean (Gulf of Iskenderun) Coasts. Ordu Üniversitesi Bilim ve Teknoloji Dergisi, Cilt: 16 Sayı: ISRIS 2026 Özel Sayı. https://doi.org/10.54370/ordubtd.1956032

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