Yazar "Altunisik, Abdullah" seçeneğine göre listele

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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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    AGE, ADULT SURVIVAL RATE, AND ADULT LIFE EXPECTANCY OF A Podarcis tauricus POPULATION (REPTILIA: LACERTIDAE) FROM SAROS BAY, TURKEY
    (Folium Publ Co, 2016) Altunisik, Abdullah; Kalayci, Tugba Ergul; Uysal, Ibrahim; Tosunoğlu, Murat; Ozdemir, Nurhayat
    In this study, the age composition of a Podarcis tauricus population from Saros Bay (northwest Turkey) was determined by skeletochronology. 27 preserved adults (20 female female, 5 male male, 2 juveniles) were evaluated and the maximum observed lifespan was recorded to be 7 years in females and 6 years in males. The mean age was 5.2 +/- 0.2 years in males and 5.0 +/- 0.2 years in females; the mean snout-vent length (SVL) was 63.0 +/- 0.7 mm (range: 60.4-64) in males and 61.3 +/- 0.9 mm (range 52.4-68.5) in females. No significant differences were found between sexes in terms of body size, but the sexual dimorphism index (SDI), was determined as 0.03, indicating a weakly malebiased. Adult survival rate and adult life expectancy were estimated to be 0.51 and 2.54 for female individuals, respectively. The lizards reached sexual maturity between 2 and 3 years. No significant difference was found between the sexes in terms of age and head sizes. The age and SVL were correlated only in females. Additionally, a significant positive correlation was found among SVL, head length (HL), and width (HW) in females.
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    Preliminary data on the age structure of Asaccus barani (Baran's leaf-toed gecko) from southeastern Anatolia, Turkey
    (Tubitak Scientific & Technological Research Council Turkey, 2015) Ergul Kalayci, Tugba; Altunisik, Abdullah; Gul, Cigdem; Ozdemir, Nurhayat; Tosunoğlu, Murat
    In this study, the age structure of an Asaccus barani sample from Sanliurfa (southeastern Anatolia, Turkey) was determined by skeletochronology for the first time. A total of 17 preserved adults (7 males, 10 females) were evaluated, and the maximum observed lifespan was recorded as 6 years in males and 5 years in females. The first line of arrested growth was partially eroded by endosteal resorption in 29% of individuals and completely eroded in 18%. The mean age was 3.85 +/- 0.50 years in males and 3.80 +/- 0.32 years in females; the mean snout-vent length (SVL) was 46.99 +/- 2.64 mm (range: 37.78-54.13) in males and 46.89 +/- 1.51 mm (range: 40.33-53.19) in females. There was no significant difference between sexes in terms of age and SVL. However, there was a positive correlation between age and SVL in both males and females.
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    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.