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    The effects of some elements (Ca, Mg and Cr) on the nesting activity of green turtles on the Samanda? Beach, Turkey
    (2006) Yalçin-Özdilek, Şükran; Özdilek, Hasan Göksel; Sangün, M. Kemal
    Samanda? Beach is one of the most important nesting habitats of Chelonia mydas (L., 1758), one of the endangered species in the globe. In this study, calcium (Ca), magnesium (Mg) and chromium (Cr) in 135 sand samples collected from the nesting habitat (Samanda?) of C. mydas species are examined. Sampling was carried out from three types of sites: (1) adjacent to nest chambers, (2) the adults' tracks, and (3) non-track (one random point from every 2 km) locations. The samples were obtained from three levels at each sampling point; surface (upper layer), medium (30 cm deep) and deep (80 cm) vertically. Some biological data about nesting activity, such as nest density and nesting success, were also monitored in 2003 nesting season. The mean concentrations of Ca, Mg and Cr in sand are 278 ppm (mg kg-1) (± 121.97), 317 ppm (± 9.92), and 5.40 ppm (± 1.38), respectively. Ca and Mg in sand have a significantly positive correlation with nesting success (r = 0.717 for Ca; r = 0.672 for Mg; both p<0.001). Moreover, Cr has a positive correlation (r = 0.760; p<0.001) with nest density. The results indicate that both Ca and Cr concentrations on sand beaches used by green turtles to nest play important roles in their nesting success. © by PSP 2006.
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    Impact of accumulated beach litter on Chelonia mydas L. 1758 (green turtle) hatchlings of the Samanda? coast, Hatay,Turkey
    (2006) Özdilek, Hasan Göksel; Yalçin-Özdilek, Şükran; Ozaner, F. Sancar; Sönmez, Bektaş
    Samanda? coast, located in the northeastern corner of the Mediterranean, is specifically used by Chelonia mydas (green turtles) as nesting area. While predators, such as foxes, crabs and dogs, naturally exist in the area, human impact by means of solid waste accumulation on the shoreline helps such predators to prey on more than a quarter of emerged green turtle hatchlings (an estimated value) in the area, entrapping them during their short shoreline trips from their nests to the sea or beach litter. In this study, litter accumulation, as well as its causes and types (recyclables, and medical, hazardous or hard-to-recycle ones) and amounts of these solid wastes at the Samanda? coast are assessed, and it was found that solid waste transport to the Mediterranean Sea from various sources accumulates the litter on the beach due to influence of wind. Moreover, the beach litter was found to be one of the most important causes that impact turtle hatchlings, when they try to safely arrive to the sea. It was found that River Asi, an international river passing through Lebanon, Syria and Turkey, mainly used for all types of solid waste disposal purposes (including medical and hazardous types) by its surrounding cities, is a notable solid waste source to the shoreline. Additionally, coastal communities had disposed all kinds of wastes on the coastal zone for a long time that resulted in several heaps of waste nearby and on the shoreline. Mid summer and early autumn were chosen as sampling periods, and remarkable increase in solid waste amount in the sampling area after the first autumn rainfall event could be observed. Surprisingly, medical and hazardous wastes on the beach were found to be notably elevated, representing more than 5% of the total beach litter. The study area is highly contaminated with solid wastes on the coast, when worldwide compared to similar beaches. It was found that solid waste accumulations on beaches negatively affect green turtle hatchlings trying to reach the sea, and percentage of hatchlings reaching the sea was found to be negatively correlated with beach litter amount (r 2 = - 0.84 on 8th July 2003; and r2 = - 0.74 on 16th of September 2003). © by PSP. 2006.
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    Some properties of new nesting areas of sea turtles in north-eastern Mediterranean situated on the extension of the Samanda? Beach, Turkey
    (Triveni Enterprises, 2006) Yalçin-Özdilek, Şükran; Sönmez, Bektaş
    One of the most endangered species in tropical seas, Chelonia mydas (green turtles) prefer undisturbed sand beaches to lay their eggs. While Caretta caretta lays their eggs all over the Mediterranean beaches of Turkey, C. mydas nesting locations are limited with north-eastern site (Alata, Kazanli, Akyatan and Samanda?) of the country and some beaches in Cyprus. Until 2003, no nesting place of both species between Akyatan and Samanda? was recorded. From north to south, the beaches examined in 2003 summer are Arsuz, Konacik, Kale, Tr-H-3, Tr-H-2, and Tr-H-1 in addition to well-known and studied nesting beaches of sea turtle species in Hatay Province: Çevlik, Şeyhhizir and Meydan. Since the Hatay Provincial Coast between Çevlik and Arsuz is hilly and no stabilized road is available, these small beaches were not known to have both C. mydas and C. caretta nests. Some physical and chemical sand properties, the number of nests belong to both species and selected nest specifications were investigated in this study. Kale Beach was found to be the most important nesting place in this less populated area. Based on results, Kale, Tr-H-3 and Tr-H-1 beaches were recorded to have high hatchling success. © Triveni Enterprises.
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    Strandings of juvenile green turtles at Samanda?, Turkey
    (2006) Yalçin-Özdilek, Şükran; Aureggi, Monica
    Strandings of juvenile green turtles, Chelonia mydas, at Samanda? beach, southeastern Turkey near Syria, suggest the area may represent a juvenile developmental habitat for the species. © 2006 Chelonian Research Foundation.