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    Comparison of the physical properties of two Green Turtle (Chelonia mydas) nesting beaches (Akyatan and Samandag) in the eastern Mediterranean (Reptilia: Cheloniidae)
    (Taylor & Francis Ltd, 2013) Sonmez, Bektas; Turan, Cemal; Ozdilek, Sukran Yalcin
    The physical properities of sea turtle nesting beaches may strongly influence embryo development and hence conservation planning. In this study, we compared the characteristics of two nesting beaches of Green Turtles, Chelonia mydas, at Akyatan and Samandag in southern Turkey. A total of 48 sand samples from 48 nests was examined and compared in respect to moisture content (M), temperature (TT), electrical conductivity (EC), salinity (S), total dissolved solution (TDS), pH, air ratio (AR), sand grain size together with distance from sea (DFS), depth (ND), incubation period (ID) and hatching success. Significant differences between the two areas were found in nest chamber moisture, conductivity, salinity, total dissolved solution and sand grain size. In a principal component analysis (PCA), the first component explained 45.1% of the variability and was dominated by the effects of the TDS, EC, S, pH and M. The second component explained 24.2 % of the variation and was dominated by the contributions of the TT, ID and ND. This is evidence that moisture plays a more important role than thermal properties in differentiating between the two beaches.
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    The effect of relocation on the morphology of Green Turtle, Chelonia mydas (Linnaeus, 1758), hatchlings on Samandag beach, Turkey (Reptilia: Cheloniidae)
    (Taylor & Francis Ltd, 2011) Sonmez, Bektas; Turan, Cemal; Ozdilek, Sukran Yalcin
    We studied the impact of nest relocation in Green Turtles, Chelonia mydas (Linnaeus, 1758), on hatchling morphology at Samandag, Turkey, and examined 350 hatchlings taken equally from both natural nests and relocated nests. The nuchal, vertebral and costal series were the most variable and the supracaudal scutes were almost stable for the hatchlings in both groups. There were significant differences in all sets of nuchal, costal and marginal except vertebral seines between hatchlings from natural and relocated nests. Hatchlings from relocated nests also had a smaller straight carapace width and lower weight than hatchlings from natural nests. Furthermore, hatchlings from relocated nests had smaller left and right fore limb lengths than hatchlings from natural nests. There were significant differences between both nests in incubation duration and moisture content. Relocation thus has a negative effect on hatchling morphology and consequently on the fitness of hatchlings. The smaller size of hatchlings (with scute variations) results in reduced fitness. In spite of the relocation of nests being an important protection technique, it has a negative effect on the morphology and probably on the viability of hatchlings.
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    Some Population Parameters of Capoeta copaeta in River ASI (Hatay-Turkey)
    (Medwell Online, 2010) Demirci, Sevil; Ozdilek, Sukran Yalcin
    This study was made on the scales of 198 Capoeta capoeta samples caught by electric fishing and fyke net in River Asi between Febmary 2002 and January 2003 to define their growth characters were. Sex ratio was obtained in favour of males. Length-weight relationship was found W = 0.005L3.24 (R2 = 0.95). The von-Bertalanffy growth parameters were L(infinity) = 27.39 cm, K = 0.44(-year) and t(0) = 0.92(-year)