Sex ratio estimations of Cheloniamydas hatchlings at Samandağ Beach, Turkey

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dc.contributor.authorYalçın Özdilek, Şükran
dc.contributor.authorSönmez, Bektaş
dc.contributor.authorKaska, Yakup
dc.date.accessioned2025-01-27T19:58:08Z
dc.date.available2025-01-27T19:58:08Z
dc.date.issued2016
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractSamandağ Beach, an important nesting location for endangered green turtles (Chelonia mydas), is located at the most eastern part of the Mediterranean in Turkey. Hatchling sex ratio can be one of the key factors for green turtle protection, which is under the threat of global climate change. In this study, sex ratios of hatchlings were estimated by histological examination of dead hatchlings (n = 190) and by nest temperatures (n = 14) at Samandağ Beach between the 2003 and 2007 nesting seasons. The histological examination of dead C. mydas hatchlings and temperature-recorded nests indicated a female-biased sex ratio on Samandağ Beach. By histological examination, top and bottom levels of nests were recorded as 94% and 64% of females. Sex ratios during the middle third of the incubation period ranged from 39% to 97% for females with a mean of 74%. Distance from the sea was correlated with the middle third of incubation temperature (r = 0.604, P = 0.022) and female ratio (r = 0.573, P = 0.032). While nest temperatures and nest parameters such as hatching success, clutch size, nest distance from the sea and from vegetation, nest depth, and the day of emergence were not found significantly different among years (P > 0.05), incubation duration was found significantly different among years (P < 0.05). The results showed a female-dominated sex ratio by both histology and nest temperature. The knowledge of hatchling sex ratios provides information on demographic parameters, and coupled with appropriate conservation measures this can make important contributions to studies of climate change effects on green sea turtle populations.
dc.identifier.endpage560
dc.identifier.issn1300-0179
dc.identifier.issn1303-6114
dc.identifier.issue4
dc.identifier.startpage552
dc.identifier.trdizinid214090
dc.identifier.urihttps://search.trdizin.gov.tr/tr/yayin/detay/214090
dc.identifier.urihttps://hdl.handle.net/20.500.12428/19869
dc.identifier.volume40
dc.indekslendigikaynakTR-Dizin
dc.language.isoen
dc.relation.ispartofTurkish Journal of Zoology
dc.relation.publicationcategoryMakale - Ulusal Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_TRD_20250125
dc.subjectBiyoloji
dc.subjectZooloji
dc.titleSex ratio estimations of Cheloniamydas hatchlings at Samandağ Beach, Turkey
dc.typeArticle

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