Deniz Kaplumbağaları Araştırma ve Uygulama Merkezi Koleksiyonu
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Öğe Discrepancies in the number of lines of arrested growth (LAG) in the tissues of the humerus and phalanx of sea turtles(Springer Heidelberg, 2025) Sandık, Emre; Sönmez, Bektaş; Yalçın Özdilek, ŞükranInformation on the age of vertebrate species such as sea turtles is crucial for planning management and conservation actions. The age of sea turtles has been estimated by skeletochronological analysis using skeletal growth marks in different bones. This study focused on the consistency of the number of visible lines of arrested growth (LAG) observed from the humerus and phalanx bone used for age estimation in Chelonia mydas and Caretta caretta. We collected 67 humeri and phalanges of C. mydas (n = 47) and C. caretta (n = 20) from Samanda & gbreve; beach, eastern Mediterranean in 2020-2022. LAG in the humerus and phalanx of the same individual were counted by two readers, and their consistency with each other was determined by percent agreement (PA), average percent error (APE), and coefficient of variation (CV). The significance of the difference between them was determined by the McNemar test. The mean number of visible LAG counted from the humerus is greater than the mean number of visible LAG counted from the phalanx, i.e., the humerus contains more growth marks than the phalanx. However, in individuals up to 15 LAG in C. mydas and 10 LAG in C. caretta, the mean number of visible LAG observed in both bone tissues is compatible. This was supported by the differences in the resorption rates calculated in both bones, indicating that the number of LAG lost due to resorption may also differ between these two bone types. It is recommended that the back calculation and/or correction factor applied for the humerus be avoided for the phalanx.Öğe First Record on Loggerhead Nest in Gökçeada, Türkiye in Northern Aegean(ABADER (Adıyaman Bilimsel Araştırmalar Derneği), 2023) Sandık, Emre; Dermancı, Pınar; Sönmez, Bektaş; Yalçın Özdilek, ŞükranThis study presents the first report of a loggerhead turtle nest in the northern latitudes in the Aegean Sea of Türkiye, which was found on the Gökçeada Island of Çanakkale Province, Turkey. The nest contains a total of 129 eggs, 103 of which produced hatchlings and 100 of these hatchlings reached to the sea safely. This sporadic record may be a result of mechanisms developed to overcome the limitations of philopatry and increase their ability to adapt to the predicted global climate change.
