Persistent organochlorine pesticide residues in water and sediment samples from Lake Manyas, Turkey.

The extent of organochlorine pesticides (OCPs) contamination in Manyas Lake (Bird Lake) and its tributary rivers and streams which is situated near the South-eastern coasts of the Marmara Sea in Turkey was investigated. Residues of OCPs in surface water and sediment samples were analysed by gas chromatography equipped with electron capture detector. The total OCPs concentration (sigmaOCPs) in water and sediment samples ranged from 1.

Molecular phylogeny of the genus Gobio Cuvier, 1816 (Teleostei: Cyprinidae) and its contribution to taxonomy.

The phylogenetic relationships among gudgeons that represent most nominal taxa within Gobio gobio sensu lato were examined by mitochondrial and nuclear genome sequencing. The molecular analyses confirmed the separate generic status of Gobio as a monophyletic group and revealed 15 Eurasian lineages divided into two main clades, the Northern European and the Ponto-Caspian. The validity of eleven nominal taxa as distinct species was confirmed, gudgeons from the Volga River basin were described as a new species G.

Preliminary data on growth and reproduction of Cobitis simplicispina from Turkey.

Preliminary data on growth and reproduction parameters of Cobitis simplicispina from Darýözü Creek in the Kizilimak basin in Kirşehir-Turkey were presented. The age of the specimens collected during a period between March and June 2002, ranged from 1+ to 4+. The observed maximum total length of males is 91.

Biochemical-genetic comparison of Cobitis simplicispina from Turkey, and C. taenia, C. albicoloris and C. elongata from Bulgarian freshwaters.

Taxonomic investigations of 4 species of the genus Cobitis: C. simplicispina Hanko 1925, C. taenia Linnaeus 1758, C.

Discrimination of Cobitis simplicispina Hanko, 1925 and Cobitis turcica Hanko, 1925 populations (Pisces: Ostariophysi: Cobitidae) from Turkey.

The most significant morphometric characters differentiating the specimens of Cobitis simplicispina collected from the Sakarya-Kizilirmak river basins, Cobitis turcica collected from Bagilli and not so far recognized species from Saz Lake were investigated in this work. ANOVA (Analysis of Variance) and canonical discriminant analysis were applied to 44 variables (5 meristic and 39 metric characters derived from 24 measured variables) to show the main differences between three populations. Populations from different localities appeared to be significantly different from each other both in meristic and metric characters.