Chromosomal differentiation between populations of Clarias gariepinus (Burchell, 1822) from the Goksu Delta and Orontes River (Turkey)

The karyotype of Clarias gariepinus was described by means of G-banding, C-banding, Q-banding, and Ag-NORs (NORs) staining in this study. Samples were collected from 2 regions of Turkey: the Goksu Delta and Orontes River. Although samples from both regions had the same diploid chromosome number and fundamental arm number, (2n = 56, FN = 100), they had remarkable differences in karyotype formula and distribution of rDNA sites, according to silver nitrate staining and G-banding. While the karyotype formula for Orontes River samples was 24m + 10sm + 10st + 12a, the Goksu Delta samples' was 28m + 6sm + 10st + 12a. Comparative analysis showed that there was intraspecific variability in NORs and different NOR numbers in the 2 populations. The study's findings show that the Goksu Delta and Orontes River samples differed from each other.


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In this study, the structure of the purified extracellular eumelanin pigment isolated from Streptomyces spp. was elucidated by detailed analysis via two different spectroscopic techniques (FT-IR and NMR). In vitro antiproliferative effects of eumelanin were evaluated on HeLa cell line. These experiments were carried out with the evaluation of the parameters including cell viability, cell index, and mitotic index. With the cell viability and cell index, IC50 concentration of eumelanin was determined as 10 μM...
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Citation Formats
A. Karahan, “Chromosomal differentiation between populations of Clarias gariepinus (Burchell, 1822) from the Goksu Delta and Orontes River (Turkey),” TURKISH JOURNAL OF BIOLOGY, pp. 79–87, 2011, Accessed: 00, 2020. [Online]. Available: