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    Genetic and morphologic structure of Liza abu (Heckel, 1843) populations from the rivers Orontes, Euphrates and Tigris
    (Tubitak Scientific & Technological Research Council Turkey, 2004) Turan, C; Ergüden, D; Turan, F; Gürlek, M
    Liza abu stocks from the rivers Orontes, Euphrates and Tigris were investigated using genetic and morphometric data. Allozyme electrophoresis for genetic comparison and the truss network system for morphometric comparison were simultaneously applied to the same sample set. Highly significant morphological differences were observed between the 3 Liza abu stocks. The correct classification of individuals into their original samples for morphological characters was very high (100% of individuals). In discriminant function analyses, plotting discriminant functions revealed high isolation of the 3 stocks; the Tigris stock was very isolated from the Euphrates and Orontes stocks, and the Euphrates stock was located between the Tigris and Orontes stocks, but was closer to the Orontes stock. The pattern of phenotypic discreteness suggests a direct relationship between the extent of phenotypic divergence and geographic separation. However, genetic data do not support the detected morphometric variations. A 5 enzyme system (ICD, PGM, ME, MDH, G3PDH) composed of 6 loci was used to determine genetic comparison. All the loci were monomorphic and therefore there was no genetic divergence among the stocks.
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    Morphometric structuring of the anchovy (Engraulis encrasicolus L.) in the Black, Aegean and Northeastern Mediterranean seas
    (Tubitak Scientific & Technological Research Council Turkey, 2004) Turan, C; Ergüden, D; Gürlek, M; Basusta, N; Turan, F
    The status of populations of anchovies in Turkish terrestrial waters was preliminarily investigated using morphometric characters with the truss network system. Samples were taken from the main fishing areas of each sea, comprising the central (Sinop) and eastern (Trabzon) Black Sea, the Aegean Sea (Izmir) and the eastern Mediterranean (Iskenderun). Plotting discriminant functions 1 and 2, explaining 93% of between-group variability, revealed a high degree of dissimilarity among the anchovy samples, indicating that the anchovies in each sea represent different aggregations. The overall random assignment of individuals into their original group was high (80%). Pairwise comparisons using multivariate analysis of variance (MANOVA) showed highly significant differences between all the samples (P < 0.001). Univariate analysis of variance (ANOVA) revealed significant differences with varying degrees between the means of the 4 samples for 16 out of 25 standardized morphometric measurements. Principal components analysis (PCA) indicated that the observed differences were mainly from the measurements taken from the head.
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    A new fish record from Turkish seas
    (Scientific Technical Research Council Turkey, 2002) Basusta, N; Turan, C; Gürlek, M
    Two and five specimens of the blackfin sorcerer, Nettastoma melanurum, were trawled on 25 and 30 April 2001 respectively at Samandag, Hatay (36degrees10'N, 35'20'E; 36degrees05'N, 35degrees40'E) at about 80-200 m depth. It is recorded for the first time from the eastern Mediterranean coast of Turkey. Thus, a new species and family have been added to the fish fauna in Turkish seas.