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    Ecological Analysis of Chironomid Larvae (Diptera, Chironomidae) in Ergene River Basin (Turkish Thrace)
    (Central Fisheries Research Inst, 2010) Ozkan, Nurcan; Moubayed-Breil, Joel; Camur-Elipek, Belgin
    In the present study, chironomid larvae were sampled periodically between the years 1995-96 during the one year at eight different localities of Ergene River Basin. A total of 60 chironomid taxa (325 individuals/m(2)) were recorded in the River and its tributaries (Ergene River Basin) during the sampling period. Also, it evaulated the larval chironomid assemblages in Meric-Ergene River Basin which is amongst the most important wetland area in European part of Turkey. Furthermore, it determined the physicochemical properties of the water to analyse the relationships between species composition of chironomid communities and environmental parameters. Structure of sediment at each sampling station of Ergene River Basin was revealed to determine the substratum preference of the larvae. It was that found sediment nutrient enrichment strongly influenced chironomid assemblage structure. Furthermore, main results due to species diversity, density of populations, similarities for the sampling stations and the substratum types were discussed. According to Shannon index, species diversity of the Basin was found as H'=1.41 at average. Also, Spearman index has indicated that significant correlations were found between chironomid larval densities and some environmental variables such as conductivity (r=-0.708), dissolved oxygen (r=+0.810), biological oxygen demand (r=+0.822), and chemical oxygen demand (r=+0.805) for P < 0.05.
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    Rheocricotopus (s. str.) costai sp. n. and R. (s. str.) pyrenaeus sp. n., two relict species from glacial rheocrenes and streams in corsica and the eastern pyrenees (diptera: chironomidae, orthocladiinae)
    (Trakya Üniversitesi Fen Bilimleri Enstitüsü, 2019) Moubayed-Breil, Joel; Ashe, Patrick
    Two new species of the genus Rheocricotopus subgenus Rheocricotopus (R. costai sp. n. and R. pyrenaeus sp. n.) are diagnosed and described, based on material collected in some glacial rheocrenes and streams located in the high mountains of Corsica and the Eastern Pyrenees. Rheocricotopus costai sp. n. is described as male and pupal exuviae, while R. pyrenaeus sp. n. is described as male and female adults and pupal exuviae. Rheocricotopus costai sp. n. is known from both western Corsica and the Eastern Pyrenees, while the geographical distribution of R. pyrenaeus sp. n. is restricted to the protected area of the Mantet Nature Reserve (Eastern Pyrenees). Larvae of both R. costai sp. n. and R. pyrenaeus sp. n. are exclusively rheophilic being confined to lotic habitats located at high altitude (crenal and rhithral). Apart from the presence of an additional median circular small patch of spinules on tergite III of the exuviae, R. costai sp. n. directly keys into the effusus-group on the basis of several specific characters found in the male adult. Nevertheless, R. pyrenaeus sp. n. keys near both of R. reduncus Sæther & Schnell, 1988 (known from Finland, Norway and Russian Far East) and R. tchernovskii Makarchenko & Makarchenko, 2005 (known from Russian Far East), based in particular, on the unusual shape of the superior volsella which is inwardly markedly turned over distally. The genus Rheocricotopus is currently represented by 10 species in continental France and by 8 species in Corsica (Moubayed-Breil 2016). Consequently, the description of R. costai sp. n. and R. pyrenaeus sp. n. increases the total number in the genus to 12 for continental France and to 9 for Corsica. Taxonomic remarks, discussion and comments on the ecology and geographical distribution of the two new species are given.