Acıpayam Meslek Yüksekokulu Koleksiyonu
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Article The Trace Element Concentrations in Tissues From the Loggerhead Sea Turtle (Caretta Caretta) From Different Life Stages in Türkiye(Univ. Oradea Publ. House, 2025) Sozbilen, Dogan; Baskale, Eyup; Hol, Aysen; Kaska, Arzu; Divrikli, Umit; Elci, Latif; Kaska, YakupSea turtles can bioaccumulate essential and nonessential trace elements, making them useful bioindicators of the marine ecosystem. We analyzed the 11 trace element concentrations in kidney, liver, and muscle samples (n=175) of stranded loggerhead sea turtles, Caretta caretta (n=70). Our results for Fe, Cu, Zn, and Mn were lower, but Pb, Ni, and Cd levels were higher than those reported in the literature. Given the high levels of loggerhead turtles in specific foraging areas, long-term, concurrent trace element monitoring studies on a larger geographic scale are necessary to understand trace element exposure levels in loggerhead turtle tissues. Conservation of long-lived animals, such as sea turtles, depends on the sustainable monitoring of the pollutants in their environment. Although metal levels were lower than those reported in the literature, we view the Mediterranean Sea as a vast lake into which the 20 countries surrounding it discharge contaminants, and we recommend continuing temporal and spatial monitoring of the impact of pollutants on sea turtles.Correction A Phenological Shift to Save the Boys? Current and Projected Trends of Hatchling Sex Ratio of the Loggerhead Turtle Caretta Caretta at Dalyan Beach, Turkiye( Vol 129 ,104091 , 2025)(Elsevier Ltd, 2025-08) Kirkham, Jay; Sozbilen, Dogan; Kaska, Arzu; Sezgin, Cisem; Kaska, YakupThe publisher regrets publication of incorrect figures. 1. Fig. 1 was replaced with the below image [Figure presented] 2. Table 1 was replaced with the below table. [Figure presented] 3. Supplementary figure 2 was published. [Figure presented] The publisher would like to apologise for any inconvenience caused. © 2025 Elsevier B.V., All rights reserved.Article Citation - WoS: 1Citation - Scopus: 1A Phenological Shift To Save the Boys? Current and Projected Trends of Hatchling Sex Ratio of the Loggerhead Turtle Caretta Caretta at Dalyan Beach, Türkiye(Pergamon-elsevier Science Ltd, 2025-04) Kirkham, Jay; Sozbilen, Dogan; Kaska, Arzu; Sezgin, Cisem; Kaska, YakupDalyan beach, Mugla, T & uuml;rkiye hosts one of the largest loggerhead turtle rookeries in the Mediterranean. The sex of marine turtles, like many reptile species, is influenced by incubation temperature, with the threat of climate change looming increasing temperatures across the world may lead to an imbalance in the sex ratio of turtle populations. Over a ten-year study period (2012-2021), temperature dataloggers (n = 497) were placed during or the morning after ovipositioning. Using middle third of incubation as a proxy for the thermosensitive period and subsequent application of the Hill Equation, this study estimates the current and projected cohort sex ratios for Dalyan beach. The estimated overall male ratio over the ten-year study period was 25.7 % f 23.3, with considerable interannual variation when data were compared from overlapping dates. Using the observed data, a GAM was built to predict nesting temperature using archived climate data, which explained 66.7 % of the variance. This model was applied to future projections of temperature using IPCC climate change scenario SSP 3-7.0, which resulted in a significant decrease in male ratio compared in the near term (2021-2040) 17.2 % f 0.6 s d, mid-term (2041-2060) 14 % f 0.5 s d and far term (2081-2100) 10.7 %. A hypothetical 10-day shift of nesting phenology would quell the effects of warming and maintain or increase current male ratio in the near term 25.6 % f 0.8 s d. A 20-day shift would have the same effect in the near term (37.3 % f 0.9 s d) and mid-term (31.4 % f 0.9 s d) projections. These nesting grounds are important to the sustained survival of the species and while this study indicates restorative potential to the sex imbalance, a reliance on the development of such a phenological shift is less than favourable. While climate change projections vary between models, a situation that gives enough buffering time is unlikely, and feminisation of the population seems inevitable without further action.Article İribaş deniz kaplumbağasi için yeni belirlenen yuvalama kumsalinin haplotip analizleri: yakacik kumsali, Türkiye(2024-06-30) Sözbilen, Doğan; Kaska, ArzuDeniz kaplumbağaları, doğumları kumsala tekrar yuva yapmak için dönme davranışlarından dolayı kumsallarına veya bölgelerine göre genetik olarak farklılık göstermektedirler. Bu farklılık, tek bir kumsal veya kumsallardan oluşmuş bir yönetim birimi olabilir. Türkiye'nin Akdeniz kıyılarında çok sayıda küçük kumsallar ve erişilemeyen uzak kumsallar bulunmaktadır. Bu çalışmada, Antalya ve Mersin il sınırındaki yeni bir yuvalama kumsalı olan Yakacık kumsalında yuvalayan Caretta caretta türü kaplumbağaların genetik yapısı araştırılmıştır. 2020 ve 2021 yuvalama sezonunda yuvalardan toplanan 16 örnekte CC-A2.1 ve CC-A3.1 olmak üzere iki haplotip tespit edilmiştir. Annelerden kalıtım yoluyla geçen mtDNA araştırıldığı için her yuvadan sadece bir adet örnek toplanmıştır. Bu haplotiplerin varlığı sonucunda, yakacık kumsalının Doğu Türkiye Yönetim Birimi'nde yer aldığı tespit edilmiştir. Türkiye, İribaş deniz kaplumbağaları (Caretta caretta) ve yeşil deniz kaplumbağalarının (Chelonia mydas) Akdeniz'deki en önemli yuvalama alanlarından birine sahip olup, yakın zamanda belirlenen kumsallarla birlikte toplamda 23 yuvalama kumsalı olmuştur. Bu araştırmada, yeni belirlenen yuvalama kumsallarının genetik özelliklerinin belirlenmesi ve Akdeniz deniz kaplumbağaları için genetik çeşitliliğin de araştırılmasının da önemine değinilmiştir.Conference Object How we understand genetic diversity of sea turtles by using mtDNA(2021) Kaska, Arzu; Koç, G.; Sözbilen, Doğan; Kaska, YakupConference Object Gaining insights into the reproductive behaviour of Caretta caretta(2021) Kaska, Arzu; Koç, G.; Sözbilen, Doğan; Kaska, YakupConference Object Genetic Structure of Sporadic Nesting Loggerhead Sea Turtle (Caretta caretta) in Aegean Coast of Turkey(2021) Kaska, Arzu; Koç, G.; Sözbilen, Doğan; Kaska, YakupConference Object The Mixed-Stock Analysis Proved Diverse Genetic Composition of Stranded Loggerhead Turtles (Caretta caretta) Along the Turkish Coast(2021) Kaska, Arzu; Koç, G; Sözbilen, Doğan; Kaska, YakupConference Object Short Tandem Repeats(Str) Of Mt Dna Of Green Turtle Nests May Offer Insıghts Into Westward Shıft Of Green Turtle Nestıng(2022) Kaska, Arzu; Sözbilen, Doğan; Snape, R.; Broderick, A.; Godley, B.; Beton, D.; Özkan, M.; Jribi, I.; Ismail, M.B.; Badreddine, A.; Nakhla, L.B.; Kaska, YakupArticle Citation - WoS: 5Citation - Scopus: 7Increased sample size provides novel insights into population structure of Mediterranean loggerhead sea turtles(Springer, 2023-05-13) Kaska, Arzu; Koc, Gizem; Sozbilen, Dogan; Salih, Diryaq; Glidan, Ashraf; Elsowayeb, Abd Alati; Saied, AlmokhtarThe loggerhead sea turtle (Caretta caretta), has the widest distribution among sea turtle species in the Mediterranean, requiring regional and international collaborations in addition to local efforts to better inform conservation actions. Molecular techniques are powerful tools for the assessment of population dynamics at large scales, especially in determining the connectivity among different nesting and foraging sites, and genetic diversity. In this study, a large sample was collected synchronously in the nesting areas located in the north, south and eastern Mediterranean. Recently confirmed nesting sites from Albania and other nesting sites represented by lower sample sizes were also included in order to better assess the genetic composition of the region's rookeries. Samples from 698 individuals were collected and the longer (815 bp) mtDNA D-loop fragment of these samples was sequenced. We recorded 15 haplotypes, three of which were novel. In addition, our results show that some haplotypes considered of Atlantic origin, have a wider dispersal in the Mediterranean than previously thought, albeit with low levels of representation. Our results contribute to determining the likely origin of haplotypes that were previously only recorded from foraging sites. They highlight the utility of broad-scale sampling, with increased sample sizes and the longer mtDNA sequence to determine genetic diversity and connectivity. This study also demonstrates the importance of continued monitoring for the contribution of Atlantic-origin haplotypes to the Mediterranean population and the effects of climate change on the resident Mediterranean population, which is expected to expand its geographical range for reproduction. This work is important for, mixed stock analyses (MSA) that seek to determine the natal regions of stranded or accidentally caught sea turtles and those purposefully obtained from foraging sites. In doing so biogeographic linkages between areas of the Mediterranean can be elucidated for conservation purposes.