Low Genetic Diversity in Turkish Populations of Wels Catfish Silurus glanis L., 1758 (Siluridae, Pisces) Revealed by Mitochondrial Control Region Sequences

turan, davut/0000-0002-9586-6223; Kalayci, Gokhan/0000-0003-1255-496X; AKSU, ISMAIL/0000-0002-2104-9888WOS: 000575615800006This study aimed to investigate the genetic diversity and population structure of Wels catfish Silurus glanis L. 1758 in Turkey using squences of the mitochondrial DNA control region the 887-bp fragment of D-loop was aligned for 112 S. glanis individuals from ten wild populations in Turkey, defined by 29 polymorphic sites comprising 16 haplotypes. the low haplotype diversity and nucleotide diversity within each population ranged from 0.000 to 0.378 and from 0.0000 to 0.0045, respectively. Analysis of molecular variance showed significant genetic differentiation among ten populations (F-ST =0.940; P0.05), Harpending's raggedness index (Hri; 0,300, P>0.05) and Ramos-Onsins & Rozas (R2; 0,0771, P>0.05), supporting population neutrality.Recep Tayyip Erdogan University Research FundRecep Tayyip Erdogan University [2009.103.01.2]This study was funded by Recep Tayyip Erdogan University Research Fund (Project No: 2009.103.01.2)

Population structure and genetic analysis of narrow-clawed crayfish (Astacus leptodactylus) populations in Turkey

AKHAN, SULEYMAN/0000-0002-9122-1495; Kalayci, Gokhan/0000-0003-1255-496X; Bektas, Yusuf/0000-0002-8367-9746WOS: 000342437700001PubMed: 25139434The genetic differentiation among Turkish populations of the narrow-clawed crayfish was investigated using a partial sequence of cytochrome oxidase subunit I gene (585 bp) of 183 specimens from 17 different crayfish populations. Median joining network and all phylogenetic analyses disclosed a strong haplotype structure with three prominent clades diverged by a range between 20 and 50 mutations and substantial inter-group pairwise sequence divergence (5.19-6.95 %), suggesting the presence of three distinct clades within the Anatolian populations of Astacus leptodactylus. the divergence times among the three clades of Turkish A. leptodactylus are estimated to be 4.96-3.70 Mya using a molecular clock of 1.4 % sequence divergence per million years, pointing to a lower Pliocene separation. the high level of genetic variability (H (d) = 95.8 %, pi = 4.17 %) and numerous private haplotypes suggest the presence of refugial populations in Anatolia unaffected by Pleistocene habitat restrictions. the pattern of genetic variation among Turkish A. leptodactylus populations, therefore, suggests that the unrevealed intraspecific genetic structure is independent of geographic tendency and congruent with the previously reported geographic distribution and number of subspecies (A. l. leptodactylus and A. l. salinus) of A. leptodactylus.Scientific Project Unit of Recep Tayyip Erdogan UniversityRecep Tayyip Erdogan University [2009.103.02.1]We would like to thank the editor and the reviewer for their time and valuable remarks. Funding for this research was provided by Scientific Project Unit of Recep Tayyip Erdogan University (Project 2009.103.02.1)

A new species of trout from the northern drainages of Euphrates River, Turkey (Salmoniformes: Salmonidae)

Bektas, Yusuf/0000-0002-8367-9746; turan, davut/0000-0002-9586-6223WOS: 000523228500001PubMed: 32166766Salmo fahrettini, a new species, is distributed in the northern tributaries of the Euphrates River. It differs from other Salmo species in adjacent waters by a combination of the following characters: a greyish body; one black spot behind the eye and on the cheek; three to six black spots on the opercle; numerous black spots on the back (missing on the predorsal area), flank and middle part of body, surrounded by a roundish white ring; red spots in the median part of the body, surrounded by a roundish white ring; short and narrow maxilla; increase in the number of black and red spots with an increase in size; adipose fin medium size, no or rarely one red spot at its posterior edge; 109-116 lateral line scales; 27-30 scale rows between dorsal-fin origin and lateral line; 20-23 scale rows between the lateral line and anal-fin origin; maxilla length 8.8-10.0% standard length in males, 8.8-9.6 in females

Molecular phylogeny of the genus Capoeta (Teleostei: Cyprinidae) in Anatolia, Turkey

Kalayci, Gokhan/0000-0003-1255-496X; AKSU, ISMAIL/0000-0002-2104-9888; Bektas, Yusuf/0000-0002-8367-9746WOS: 000397377900012Phylogeny of Capoeta genus distributed in Anatolia were carried out by analysing mitochondria cytochrome b gene (1140 bp) sequences from 332 samples representing 59 populations of 15 species across their geographical distribution. Haplotype network and phylogenetic analysis (neighbor-joining, maximum-likelihood, maximum parsimony, and bayesian inference) of the 103 cytochrome b haplotypes detected in Capoeta species resulted in similar tree topologies including four distinct clades, in congruent with taxonomic classification of Capoeta based on morphological characteristics such as scale size, mouth shape, and body spotting. Based on cyt b nucleotide sequences, the present study suggests that four undescribed Capoeta species may exist in Anatolia freshwater; one species in the Kizilirmak River, the second species in the Dirgine River, the third species B. Menderes River, and the fourth species in the some Yesilirmak tributaries that run into the Black Sea Basin. Capoeta taxa distributed in the rivers of Anatolian freshwater basins are isolated from each other during middle Miocene (Serravallian)-late Pleistocene (Ionian) (about 13.75-0.41 million years). This suggests that distribution and presence of Capoeta species were shaped under paleogeographic conditions such as Pleistocene climate changes in Quarternary period as well as tectonic uplift and faulting, which probably has not changed up to now. (C) 2016 Elsevier Ltd. All rights reserved.Recep Tayyip Erdogan UniversityRecep Tayyip Erdogan University [2011.103.01.2]This work was funded in part by the scientific research funds of Recep Tayyip Erdogan University (RTEU BAP, Project No: 2011.103.01.2)

Fiber Bragg grating and etched optic sensors for flow and cure monitoring of resin transfer molded composite structures

In this study, we present the research conducted on in situ process monitoring (cure and flow) of resin transfer molded glass fiber reinforced polymer composites using fiber Bragg grating (FBG), and etched bare fiber optic sensors. Both FBG and etched fiber sensors are embedded into glass fiber reinforced composites manufactured by the Resin Transfer Molding (RTM) method, and are used to monitor the flow front during the resin injection process and subsequently the cure cycle. The results of this study have shown that both the FBG and etched sensors can be used efficiently for flow and cure monitoring in the RTM process. The experimental results of etched sensors are in accordance with those of FBG sensors for cure monitoring

Fatigue monitoring of glass fiber reinforced composite using fiber Bragg grating

Glass fiber reinforced composite (GFRC) are widely used in all load bearing industrial applications. It is therefore critical to understand the fatigue characteristic of GFRC to improve the material characteristics of these composites and to prevent any untoward accidents. In this paper we describe the preliminary results of fatigue test on GFRC fabricated using an in-house laboratory scale resin transfer molding system. The fatigue tests are done for different load conditions – tension compression and reverse bending. Fiber Bragg grating (FBG) is embedded into the composite at the manufacturing step for monitoring the strain. The preliminary results of these experiments are presented