Yazar "Bayrakci, Yusuf" seçeneğine göre listele

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    ABUNDANCE OF WESTERN CASPIAN TURTLE, Mauremys rivulata (VALENCIENNES, 1833) IN GOKCEADA (IMBROS), TURKEY
    (Folium Publ Co, 2016) Bayrakci, Yusuf; Ayaz, Dincer; Yakin, Batuhan Yaman; Cicek, Kerim; Tok, Cemal Varol
    In this study, we present data on the population of Western Caspian Turtle, Mauremys rivulata, from Gokceada (Imbros) located at the westernmost of Turkey. The species is distributed almost all around the island, particularly in the western part, with a very low density. Distribution of the species on the island was mapped and a total of 73 individuals were captured and marked in Buyukdere, the largest river of the island. Population size was estimated at 135 individuals (SE - 11, range - 117 - 161) and density was calculated as 68 ind/ha. Moreover, Emys orbicularis, another freshwater turtle species, which cohabits in the west Anatolia, was observed again on the island after 15 years. Tourism, creeks with irregular flow regime and holding water in the dams negatively affect populations of aquatic species, primarily M. rivulata on the island.
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    Conservation activities for European pond turtles (Emys orbicularis) in Turkey
    (2013) Ayaz, Dinçer; Çiçek, Kerim; Tok, Cemal Varol; Mutlu, Hasan Serdar; Cumhuriyet, O?uzkan; Bayrakci, Yusuf; Kumaş, Meltem
    [No abstract available]
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    Reproductive Ecology of the European Pond Turtle, Emys orbicularis (Linnaeus, 1758), from Mediterranean Turkey
    (Inst Zoology, Bas, 2017) Ayaz, Dincer; Cicek, Kerim; Bayrakci, Yusuf; Tok, Cemal Varol
    For two consecutive years (2012 and 2013), studies on reproductive ecology of Emys orbicularis were conducted at seven localities in the Mediterranean region of Turkey. Our findings show that individuals usually emerge from hibernation between the end of February and early March. Depending on latitude and elevation, mating occurred between March and May, and egg -laying lasted between May and July. Hatchlings were first observed between June and August. Average fecundity in females was 7 (5-10) eggs, and incubation period was determined to last between 80 and 110 days. Average size of eggs was 33.55 x 20.32 mm, and only a weak correlation between numbers of eggs and female body sizes (straight carapace length, SCL) was found. Average measurements of hatchlings were: SCL was 20.6 mm (18-23 mm), plastron length (PL) was 19.6 (17.6-22.4 mm) and weight was 3.6 g (2.9-4.3 g). These were compared to previously published results obtained for E. orbicularis from other parts of its range. Also, factors that affect reproductive success were discussed.