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    Öğe
    A two-headed green sea turtle (Chelonia mydas) hatchling on samandağ beach, Turkey
    (Folium Ltd, 2017) Sönmez, Bektaş; Sert, Mehmet; Kayikçi, Senem; Bedirci, Özay; Özdilek, Şükran Yalçin
    A two headed green sea turtle (Chelonia mydas) was found on Samanda? Beach, Turkey in 2015 nesting season. The two heads were anatomically similar with independent reaction to external stimuli. The carapace scutes showed anomalies. Radiography was performed and the spinal column was seen to bifurcate in the area close to the caudal region. In the post mortem examination, esophagus, stomach, liver, lung, heart and trachea were duplicated. The two headed green turtle was subclassified as teratodidymus. Dicephalism rarely occurs in sea turtle and perhaps genetic factors may play a significant role for this two headed green sea turtle. © 2017 Folium Publishing Company.
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    Öğe
    A TWO-HEADED GREEN SEA TURTLE (Chelonia mydas) HATCHLING ON SAMANDAG BEACH, TURKEY
    (Folium Publ Co, 2017) Sonmez, Bektas; Sert, Mehmet; Kayikci, Senem; Bedirci, Ozay; Yalçın Özdilek, Şükran
    A two headed green sea turtle (Chelonia mydas) was found on Samandag Beach, Turkey in 2015 nesting season. The two heads were anatomically similar with independent reaction to external stimuli. The carapace scutes showed anomalies. Radiography was performed and the spinal column was seen to bifurcate in the area close to the caudal region. In the post mortem examination, esophagus, stomach, liver, lung, heart and trachea were duplicated. The two headed green turtle was subclassified as teratodidymus. Dicephalism rarely occurs in sea turtle and perhaps genetic factors may play a significant role for this two headed green sea turtle.
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    Öğe
    Hatay kumsallarında yuvalayan yeşil deniz kaplumbağalarının (Chelonia mydas) denizel besin ağındaki yerinin kararlı izotop yöntemi ile araştırılması
    (Çanakkale Onsekiz Mart Üniversitesi, 2019) Sert, Mehmet; Yalçın Özdilek, Şükran
    Hatay Samandağ kıyıları yeşil deniz kaplumbağalar için Doğu Akdeniz'deki önemli yuvalama alanlarından birisidir. Bu çalışmada Samandağ kıyılarına yuvalamaya gelen yeşil deniz kaplumbağalarının denizel besin ağındaki pozisyonu, besinlerin diyetlerine katkı oranları ve morfometrik ölçümler ile izotop komposizyonları arasındaki ilişki incelenmiştir. 2016 yılında Samandağ kumsalına yuvalamaya gelen 31 dişi deniz kaplumbağası dokuları kullanılmıştır. Bu kaplumbağalardan keratin, epidermis ve kan dokusu örnekleri, kaplumbağanın karapası üzerindeki Chelonibia testudinaria örnekleri ile Samandağ kıyısı neritik alandan toplanan bentik, pelajik omurgarlı, omurgasız canlı ve bitki örneklerinin kararlı azot ve karbon izotop analizi kütle spektrometrede yapılmıştır. Yetişkin yeşil deniz kaplumbağaların %66 bentik %33 pelajik alanda juvenil olanların %49 bentik %51 pelajik alandaki canlılarla beslendiği bulunmuştur. Juvenil ve ergin bireylerin besin ağında farklı pozisyonlarda oldukları, ergin bireylerin de benzer ancak farklı beslenme grubu oluşturdukları bulnmuştur. Deniz kaplumbağası EKB ve EKE ile keratin dokusunda ölçülen ?13C değerleri arasında anlamlı bir ilişki bulunmuştur. Kaplumbağadan alınan dokular ile Chelonibia testudinaria dokuları arasında anlamlı bir ilişki bulunamamıştır. Yaşamlarının büyük bir kısımını denizde geçiren bu türlerin denizel habitatlarına ait daha fazla bilgi edinilebilecek çalışmaların yapılması önerilir.
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    Öğe
    Stranded sea turtle records between 2010 and 2017 in northern Aegean and Sea of Marmara
    (Elsevier Science Bv, 2018) Yalçın Özdilek, Şükran; Sonmez, Bektas; Sert, Mehmet
    Studies on sea turtles in Turkey have mostly been concentrated on nesting beaches. Although there is no sea turtle nesting beaches on the northern Aegean Sea coast, there are stranded sea turtle records from the northern Aegean Sea and the Sea of Marmara. This study aimed to investigate causes of strandings and their spatio-temporal distribution in these two seas between 2010 and 2017. For data acquisition, denunciations to the Canakkale Onsekiz Mart University's Sea Turtle Research and Application Center (COMU-DEKUM) were used. A total of 37 sea turtles were studied; 8.1% of them were Chelonia mydas, and 91.9% were Caretta caretta. The number of dead strandings (53%) was higher than that of injured strandings (47%). The mean curved carapace length and width of the 27 C. caretta individuals were 68.97 cm and 61.96 cm, respectively, and for C. mydas, these values were 34.5 cm and 29.5 cm, respectively. The most intensive area of strandings was Canakkale (76.5%). Moreover, although adult sea turtles were frequently stranded in the Sea of Marmara, sub-adult sea turtles were frequently stranded in the northern Aegean Sea. The leading causes of strandings in the study site were identified as intentional harm (45.9%) and fishing activities (27%). The results of this study show that coasts of the northern Aegean and the Sea of Marmara may be marine habitats of sea turtles. It is recommended that awareness-raising activities for fishermen in the region should be initiated. (C) 2018 Elsevier B.V. All rights reserved.