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    Distribution of Microflora, Meiofauna, and Macrofauna Assemblages in the Hypersaline Environment of Northeastern Aegean Sea Coasts
    (Coastal Education & Research Foundation, 2013) Bassler-Veit, Barbara; Barut, Ipek F.; Meric, Engin; Avsar, Niyazi; Nazik, Atike; Kapan-Yesilyurt, Sevinc; Yildiz, Aysegul
    In this study, the morphology and taxonomy of microflora (charophytes and diatoms), meiofauna (benthic foraminifera and ostracoda), and macrofauna (mollusk) assemblages of the recent surface sediments from saltpans, hypersaline lagoons, and salt lakes of the Gulf of Saros (NW Turkey) were investigated. In total, 44 samples were collected from recent surface sediments in salt pans, hypersaline lagoons, and salt lakes of the Gulf of Saros (Enez Salt Lake, Isik Lake, Kuvalak Lake, Enez Gala Lake, Dalyan Lake, and Tasalti Lake; Karagol, Vakif, and Erikli salt pans; and Uzungol Lagoon), Gallipoli Peninsula (salt pan), Biga Peninsula (Diremin and Azmak Lagoons and Dalyan Salt Lake), and Gokceada Island (salt lake). Surface sediments were collected, and some physical properties were measured, such as temperature, pH, and salt content. Grain size was determined and classified for each sample. In this study, foraminifera, ostracoda, and mollusca faunas in the normal marine environment were used as indicators and compared with the lagoonal environment, which has increased salt content during the summer months.
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    Genetic differentiation of non-native populations of Gibel Carp,Carassius gibelioin Western Turkey by ISSR and SRAP markers
    (Taylor & Francis Ltd, 2020) Agdamar, Sevan; Baysal, Omur; Yildiz, Aysegul; Tarkan, Ali Serhan
    Freshwater fish are one of the most frequently translocated and introduced aquatic animal groups and exhibit higher establishment ratios than many other taxa. Introductions are usually irreversible. One of common non-native fish species in Turkey is the Gibel Carp,Carassius gibeliowhich was introduced in the 1980s and is now widespread. We tested dominant markers (ISSR and SRAP) for genetic characterisation of Gibel Carp samples collected from eight locations in western Turkey. ISSR and SRAP marker sets showed that the level of gene flow between these populations (N-m= 0.45 /N-m= 0.47) is low and that the level of genetic differentiation (G(ST)= 0.53 /G(ST)= 0.52) is high. Inter-population variation detected by ISSR and SRAP markers constituted half part of the population (46.88 / 50.00%), while the rest was at intra-population level. These results indicate that the present population of the Gibel Carp is the result of several colonization events originating from the different sources. The phylogenetic relationship among the populations suggest that there were two independent major introduction events, one in the Marmara Region and the other in southern Turkey.