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    A skeletochronological analysis of a population of the Anatolia Newt, Neurergus strauchii (Steindachner, 1887) (Caudata: Salamandridae), in Eastern Anatolia, Turkey
    (Taylor & Francis Ltd, 2015) Yakin, Batuhan Yaman; Cicek, Kerim; Koyun, Mustafa; Gurkan, Mert; Hayretdag, Sibel; Tok, Cemal Varol
    This study presents data on age, growth and longevity of a population of Neurergus strauchii in Eastern Anatolia (Bingol, Turkey) based on skeletochronological data. The phalangeal diaphyseal cross-sections of 54 individuals studied (12o, 42f) showed that females are on average older than males: the ages ranged from 6 to 14 years, with an average age of 8.8 years in males and 10.9 years in females. Sexual maturity is reached at an age of 4-5 years in both sexes. The slow growth and the longevity make the species vulnerable.
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    Food composition of a breeding population of the endemic Anatolia newt, Neurergus strauchii (Steindachner, 1887) (Caudata: Salamandridae), from Bingol, Eastern Turkey
    (Firenze Univ Press, 2020) Cicek, Kerim; Koyun, Mustafa; Mermer, Ahmet; Tok, Cemal Varol
    The study presents data on the food composition of a breeding population of the Anatolia newt Neurergus strauchii (Steindachner, 1887), from Bingol, Turkey. A total of 953 prey items were determined in the food contents of 46 individuals (18 males and 28 females) examined in the study. Insecta (63%) and Malacostraca (35%) constitute 97% of the food composition by number. While the most frequently encountered prey groups in the diet are Diptera (87%), Amphipoda (85%), Neurergus eggs (74%), and Coleoptera (37%), the comparison of food composition by volume is Amphipoda (40%), Neurergus eggs (41%), and Diptera (10%) respectively. No significant difference in food niche was observed between the sexes. The species generally fed on aquatic, poor-flying or slow-moving invertebrates.
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    Öğe
    Food composition of the Near Eastern Fire Salamander, Salamandra infraimmaculata Martens, 1885 (Amphibia: Urodela: Salamandridae) from Eastern Anatolia
    (Taylor & Francis Ltd, 2017) Cicek, Kerim; Koyun, Mustafa; Tok, Cemal Varol
    This study presents data on the food composition of the Near Eastern Fire Salamander, Salamandra infraimmaculata, from Bingol, eastern Turkey. A total of 139 prey items was determined in the food content of 28 individuals (14 juveniles, 7 males, and 7 females). Insecta (N%= 37.4), Gastropoda (27.3%), and Isopoda (25.9%) constitute together 91% of the food items. The most frequent prey groups in the diet are Coleoptera (F%=50.0%), Isopoda (57.1%), and Gastropoda (46.4%). Coleoptera (V%= 34.6%), Gastropoda (28.0%), and Isopoda (23.5%) had the highest prey volumes. No significant difference was found between the sexes in food composition. The species generally feeds upon poorly flying or slow-moving invertebrates, but is opportunistic in taking up more mobile prey species as well. Diptera, Odonata and Hemiptera were found in small numbers only.
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    Öğe
    Predicting the current and future potential distributions of Anatolia Newt, Neurergus strauchii (Steindachner, 1887), with a new record from Elazi? (Eastern Anatolia, Turkey)
    (Universitatea din Oradea, 2016) Tok, Cemal Varol; Koyun, Mustafa; Çiçek, Kerim
    Here, the current and future distributions of Neurergus strauchii was predicted by using the maximum entropy ecological niche modeling. The most important factors which shaped the present distribution of the species are isothermality and precipitation of driest month. The species is particularly distributed on the Euphrates Valley and in the west and south of Lake Van. According to the future model scenarios, it is predicted that depending on the climate change, there will be some loss in the habitats suitable for the species to inhabit and that its distribution will particularly tend to narrow from its western and eastern boundaries. Accordingly, the pressure of climate change and the other factors on the species is also discussed. In addition, the record of N. strauchii from a new locality in Elazi? (Eastern Anatolia) is first provided in this study. © Biharean Biologist, Oradea, Romania, 2016.