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    Age structure and body size of the Strauch's racerunner, Eremias strauchi strauchi Kessler, 1878
    (Tubitak Scientific & Technological Research Council Turkey, 2013) Altunisik, Abdullah; Gul, Cigdem; Ozdemir, Nurhayat; Tosunoğlu, Murat; Ergul, Tugba
    We studied, for the first time, the age structure of Eremias strauchi strauchi (Kessler, 1878) from a sample (18 adults) of a population living in the vicinity of Igdir (eastern Turkey) using the skeletochronological method. The maximum observed longevity was 7 years for males and 5 years for females. The age of males ranged from 4 to 7 years (mean 4.91, n = 12), while that of females ranged from 4 to 5 years (mean 4.66, n = 6). The average snout-vent length (SVL) was 61.10 mm in males and 60.82 mm in females. The differences in mean age and SVL between sexes were not statistically significant. Intersexual differences in body size were male-biased, but this state was not statistically significant. Age and SVL were positively correlated in both sexes.
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    Öğe
    Variation in body size and age structure among three Turkish populations of the treefrog Hyla arborea
    (Brill, 2012) Ozdemir, Nurhayat; Altunisik, Abdullah; Ergul, Tugba; Gul, Serkan; Tosunoğlu, Murat; Cadeddu, Giorgia; Giacoma, Cristina
    To determine how climate factors influence age, body size and sexual size dimorphism (SSD) in the Mediterranean region, we generated data on age and body size of the European Treefrog, Hyla arborea, in three Turkish populations with a latitudinal gradient. We estimated age structure (total n = 154), using skeletochronology. Mean body size of both sexes was smaller in a southern population (Antalya) than in northern populations (Canakkale and Rize) with female-larger SSD in the northern populations. A positive correlation was found between age and body size in each sex of all the populations, save the Antalya females. Since amphibian growth is reduced after maturity but continues towards the asymptotic size, interpopulation size differences may partly be explained by differences in longevity with four years in Antalya and five years in the other two populations. Comparing age and body size in three Turkish populations with those in three different populations (Greece, Switzerland and Germany) from the literature, there was a trend of South-to-North increase in body size with increased latitude and decreased temperature and aridity. The same trend occurred also in age structure (e.g., age at maturity/first reproduction, longevity). These results suggest that a difference in age structure between populations is a main factor for the geographic variation in body size of this species.