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Öğe A New Locality for Rana ridibunda caralitana Arikan, 1988 (Anura: Ranidae) in the Central Anatolia(Ege Univ, 2006) Ayaz, Dincer; Tok, Cemal Varol; Mermer, Ahmet; Tosunoğlu, Murat; Afsar, Murat; Cicek, KerimIn this study, a total of 18 (10 male male, 8 female female) adult marsh frog specimens collected from Bor (Nigde) have been examined through the morphological analysis, primarily on their coloration and pattern characteristics. It is concluded that the examined specimens fall into caralitana category. Thus, the distrubution area of caralitana has been extended.Öğe A new locality for Rana ridibunda caralitana Arıkan, 1988 (Anura: Ranidae) in the Central Anatolia(2006) Ayaz, Dinçer; Tok, Cemal Varol; Mermer, Ahmet; Tosunoğlu, Murat; Afsar, Murat; Çiçek, KerimOrta Anadolu’da Rana ridibunda caralitana Arıkan, 1988 için yeni bir lokalite. Bu çalışmada, Bor (Niğde)’dan toplanan 18 (10 ??, 8 ??) ergin ova kurbağası örneği, başta renk-desen olmak üzere yapılan morfolojik analiz sonucunda incelenmiştir. İncelenen örneklerin caralitana formuna ait olduğu anlaşılmıştır. Böylece caralitana’nın dağılış areali genişletilmiştir.Öğe Effects of Altitude and Temperature on Erythrocyte Morphology of Emys orbicularis (Linnaeus, 1758) and Mauremys rivulata (Valenciennes, 18330)(ABADER (Adıyaman Bilimsel Araştırmalar Derneği), 2021) Bayrakçı, Yusuf; Yenmiş, Melodi; Mermer, Ahmet; Tok, Cemal Varol; Ayaz, DinçerThe decrease in erythrocyte size of animals live at high altitudes yields an evolutionary advantage to survive by providing adaptation to colder temperatures and low partial oxygen pressures. We examined the effect of geographical changes on the erythrocyte morphology of two terrapins, Emys orbicularis and Mauremys rivulata, and analyzed whether such erythrocyte characteristics as size and volume changed at high altitudes and different temperatures. We found out that the erythrocyte characteristics varied both within and between the populations. They varied depending on altitude for E. orbicularis and on temperature for M. rivulata. However, the erythrocyte characteristics were not correlated with the environmental parameters, except between sunshine duration and erythrocyte length, size, and nucleus volume for E. orbicularis. Yüksek rakımlarda yaşayan hayvanlarda eritrosit boyutlarındaki azalma, düşük sıcaklıklara ve düşük kısmi oksijen basıncına adaptasyon sağlayarak hayatta kalmalarına evrimsel bir avantaj kazandırmaktadır. Coğrafik değişikliklerin eritrosit morfolojisi üzerindeki etkilerini iki tatlısu kaplumbağası türü olan Emys orbicularis ve Mauremys rivulata’da inceledik ve boyut ve hacim gibi eritrosit özelliklerinin yüksek rakım ve farklı sıcaklıklarda değişip değişmediğini analiz ettik. Eritrosit özelliklerinin hem populasyon içerisinde hem de populasyonlar arasında farklılık gösterdiğini belirledik. E. orbicularis için yüksekliğe bağlı olarak, M. rivulata içinse sıcaklığa bağlı olarak değişiklik göstermektedir. Bununla birlikte, E. orbicularis için güneşlenme süresi ile eritrosit uzunluğu, büyüklüğü ve nukleus hacmi arasındaki korelasyon dışında, eritrosit özellikleri ile çevresel parametreler arasında korelasyon görülmemektedir.Öğe 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 VarolThe 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.Öğe Food habits of the Lycian Salamander, Lyciasalamandra fazilae (Basoglu and Atatur, 1974)(Univ Oradea Publ House, 2007) Cicek, Kerim; Tok, Cemal Varol; Mermer, Ahmet; Tosunoğlu, Murat; Ayaz, DincerWe analyzed stomach contents of 21 (13 (3,3, 8 female female) adult Lycian salamanders, Lyciasalaniandra fazilae, inhabiting Go)kbel and iztuzu, south of Dalyan (Koycegiz, Mugla). Although various terrestrial invertebrates constitute the diet of the salamander, larvae and adult beetles (39.61%), centipedes (16.88%) are the most important food groups. Lyciasalaniandra fazilae is an active predator capable of changing its feeding regime in proportion to the species richness within its habitat.Öğe Population dynamics of Rana macrocnemis Boulenger, 1885 at Uludag, Western Turkey (Anura: Ranidae)(Max Kasparek Verlag, 2011) Cicek, Kerim; Mermer, Ahmet; Tok, Cemal VarolIn a study on the population dynamics of the Uludag Frog, Rana macrocnemis Boulenger, 1885 at Uludag, 4,952 individuals were marked with toe-clipping, visible implant elastomer and vi alpha tags between 2006 and 2008. 47.1% of the population consisted of males, 39.0% of females and 13.8% of juveniles, and a male-biased sex ratio was observed. According to the formula of Jolly-Seber, the mean population size was calculated for individual study plots as 1,535 in Kirazliyayla, 1,578 in Sarialan, 1,481 in the Hotels District, 823 in Lake Kilimli, 742 in Lake Kara, 675 in Lake Aynali, 658 in Lake Kogukdere, and 151 in Lake Heybeli. The total population size was estimated at 7,643 individuals (3,113 in forest, 4,530 in the subalpine belt) in 1.30 ha areas (0.14 ha in forest, 1.16 ha in the subalpine belt) in study plots of Uludag ranging between 1,476 to 2,450 in a.s.l. The capture probability ranged from 0.21 to 0.93 and the survival rate ranged from 0.57 to 0.98 among the populations, and the mean population density was calculated as 0.19-2.52 individuals/m(2). The age in the population varied between 2 and 11 years, and the median age was calculated as 4 in males, 4.5 in females. The sexual maturity age ranged from 2nd to 6th years depending on altitude (from 1,476 to 2,450 m). It was found that the breeding period commenced in early April upon the melting of the snow and extended until the end of June, depending on altitude. The mean number of eggs in an egg mass was calculated to be 987+/-326. Spawned eggs hatched in 7 to 32 days depending on weather conditions and metamorphosis was completed in 46 to 130 days.Öğe Population estimate and body size of European pond turtles (Emys orbicularis) from Pazaragac (Afyonkarahisar/Turkey)(Walter De Gruyter Gmbh, 2007) Ayaz, Dincer; Fritz, Uwe; Tok, Cemal Varol; Mermer, Ahmet; Tosunoğlu, Murat; Afsar, Murat; Cicek, KerimData on population size, adult sex ratio, body size and mass are provided for a population of the turtle Emys orbicularis near Pazaragac (Afyonkarahisar/Turkey). Using the mark-recapture method (triple catch), a population size of 664 turtles was estimated (95% confidence interval, range 332-996), corresponding to a density of 83 turtles per hectare (range 41.5-124.5). The adult sex-ratio was significantly skewed in favor of males (2.02 males: 1 female; P < 0.001). Almost all recorded specimens were adult (98.1%). Mean straight carapace length (SCL) and body mass (BM) of adult turtles were: SCL = 128.65 mm, BM = 345 g for males (n = 168) and SCL = 135.37 mm, BM = 463 g for females (n = 83).Öğe Population size of the marsh frog (Rana ridibunda Pallas, 1771) in Lake Yayla (Denizli, Turkey)(2007) Ayaz, Dinçer; Tok, Cemal Varol; Mermer, Ahmet; Tosunoğlu, Murat; Afsar, Murat; ÇiÇek, KerimThe population size of marsh frogs (Rana ridibunda) was estimated using the mark-recapture method in Lake Yayla (Buldan, Denizli, Turkey). According to the results, the mean estimated population was 14,733 and the sex ratio was female biased (male: female, 0.56). The main limiting factors of the marsh frog population are also outlined. © Tübitak.Öğe Preliminary study on the age- And sex-dependent variations in the venom proteins of Montivipera albizona (Nilson, Andrén & Flärdh, 1990) (Ophidia: Viperidae) in Anatolia(Universitatea din Oradea, 2020) Mermer, Ahmet; Arikan, Hüseyin; Çi?Çek, Kerim; Tok, Cemal VarolIn this study, polyacrylamide disc gel electrophoresis and densitometry methods were used to analyze venom extracts of three Montivipera albizona specimens collected from Sivas (Central Anatolia, Turkey). The venom secretion was colorless in juvenile and light yellow in mature individuals. The venom proteins of M. albizona could be separated into 10, 11, 12 fractions or fraction groups. Besides, the electropherograms of the venom protein samples showed both sex-based and age-dependent qualitative and quantitative variations. © Biharean Biologist, Oradea, Romania, 2020Öğe Ranid frog specimens collected from the vicinity of Erzurum, NE Anatolia(2004) Ayaz, Dinçer; Tok, Cemal Varol; Atatür, Mehmet Kutsay; Mermer, AhmetMorfolojik analize (morfometrik-renk desen) bakılarak 40 örnek (11 $male male$ , 19 $female female$ , 10 juv.) incelenmiştir. Elde edilen veriler ilgili literatürlerle karşılaştırıldığında; ventral tarafın renklenme karakterleri nominal ırktan çok Rana ridibunda cf. caralitena'ya benzerlik göstermektedir.
