Nuri Yiğit

Ankara University · Department of Biology

Mutations in Exon 1, 2 and 3 of the vitamin K epoxide reductase complex subunit 1 (Vkorc1) gene are known to lead to anticoagulant rodenticide resistance. In order to investigate their putative resistance in rodenticides, we studied the genetic profile of the Vkorc1 gene in Turkish black rats (Rattus rattus) and brown rats (Rattus norvegicus). In t...

Intra– and inter–specific phylogenetic relationships and the taxonomic status of pine vole populations have been controversial for years, and cryptic species are thought to exist, especially concering the species' distribution area. To clarify the taxonomic status of Turkish populations we analysed mitochondrial (cytochrome–b and cytochrome oxidase...

Diflubenzuron is a commonly used larvicide/biocidal substance. The present study aimed to reveal the effects of diflubenzuron on Acetylcholinesterase (AChE) enzymatic activity and liver histopathology of a mammalian species (rats). The animals fed with various doses of diflubenzuron and the liver tissues of rats were taken on the 10th, 20th, 25th,...

The East European vole Microtus mystacinus is the most widespread vole species in Anatolia. It is also frequently seen in watery habitats in a large area of Eurasia. In this paper, an attempt was made to ascertain the level of genetic differentiation between Anatolian (Asian part of Turkey) and Turkish Thracian (European part of Turkey) populations...

The genus Chionomys includes two supraspecific groups: "nivalis" and "gud-roberti". For a long time, it has been thought that the nivalis group includes only C. nivalis. Here, molecular phylogenetic analysis of nine specimens from Turkey, Armenia, and Iran was performed using the Cytb gene and two nuclear genes: BRCA1 and GHR. In the results on Cyt...

Considering alien and invasive species are major threat to indigenous species, the recent status of these type of vertebrates were reviewed along with the current rodent management application in Turkey. More than twenty-five alien, potentially invasive freshwater fish species have been reported in Turkey. Of these, seven were recorded from inland...

The results of a cytogenetic study on some representatives of Gliridae from Turkey were introduced. The G-, C-, and AgNOR banded karyotypes of Muscardinus avellanarius abanticus from Abant (Bolu), and the G-banded karyotype of Myomimus roachi from Thrace were presented for the first time. Additionally, the G-banded karyotypes of Dryomys nitedula, a...

Anadolu çöl sıçanı Meriones tristrami, Anadolu steplerinde geniş yayılışa sahip bir kemirgen türüdür. Bu çalışmada, bu türün altpopulasyonları arasındaki ilişkileri belirlemek ve yayılışlarına açıklık getirmek üzere, tüm Türkiye'yi temsil edecek 233 ergin örnek, kaydedildikleri coğrafik lokalitelerine göre 12 grup altında biyometrik olarak karşılaş...

The present study aimed to reveal the relationship between the genetic diversity of Tristram's jird Mer-iones tristrami subpopulations by using cyt-b sequences, the amplified fragments of cyt-b produced by restriction endonuclease (RFLP; Msp I, Rsa I, Noc I and Hae III were used) and the distribution on the Anatolian Peninsula. Eighteen haplotypes...

The efficacy of diflubenzuron on mixed mosquito larvae (Culex sp., and Anopheles sp.) and its deterioration in clean aquatic system were tested in the certain intervals by the HPLC. It was determined that the diflubenzuron (20 % wettable formula) deteriorated by 30 % at the end of three months and 60 % at six months respectively. Based on these fin...

Up to 2013 there was a small-scale mine loading port with small pier in Yeşilovacık bay. Then the new pier extending to open sea in south west direction was built. The impact assessments of the former and later port on the monk seal were evaluated by monitoring their activities in the bay. The monk seal records were very rare during the period of e...

In this study, 181 samples of the five species of Meriones crassus, M. persicus, M. tristrami, M. vinogradovi and M. dahli distributed in Turkey were compared in terms of biometric characteristics. In principle component analyses (PCA), four components were explained 78.4% of total variance. Twenty-three characters, including total body length and...

Microtus levis (Miller, 1908) is a vole species widespread in Asia and Europe, and this species are also frequently found in watery meadows in Turkey except for Eastern Northsea and Southeastern Anatolia. Thrace and Anatolia populations of M. levis have been seperated by Bosporus and Dardanelle Straits, and therefore genetic differentiation due to...

Taxonomical status of Microtus guentheri (Danford and Alston, 1880)- Guenther’s vole distributed in Southeastern Anatolia, Syria, Israel, Lebanon and Northern Libya is controversial and few studies have been performed about this topic. In this study, Cytochrome-oxidase I (COXI), Cytochrome-b (Cyt-b) and 12S rRNA gene regions were analyzed and mitoc...

Some mutations in Vkorc1 gene are known to inhibit anticoagulant rodenticides to bind the enzyme “vitamin K epoxide reductase”. First and second generation anticoagulant rodenticides have been commonly used in rodent management in urbans of Turkey. Norway rat “Rattus norvegicus” is distributed in Turkey, especially North and North-west parts of cou...

Synonym site mutations do not cause any changes in the protein sequence, whereas non-synonymous site mutations alter the protein sequence, causing amino acid changes. In this study, the rates of synonymous and non-synonymous substitution (Ks-Ka values) with the mutation and nucleotide variations in the synonymous and non-synonymous were analysed in...

Genetic diversity and phylogeny of Dryomys nitedula and Dryomys laniger from Turkey was described in the present study by using mitochondrial DNA NADH dehydrogenase 1 gene (ND1). Genetic variation in ND1 gene was determined by two model-based phylogenetic analyses and a network analysis revealed 27 haplotypes of D. nitedula constructing four main l...

Histochemical effects of Brodifacoumon rat spleen are examined under light microscope by using histochemical staining method. Rats were divided into five groups (n:6 individual): control group, 24 hours, 72 hours, 14 days and 30 days Brodifacoum applied groups. Single dose of 0.2 mg Brodifacoum was given orally to mature male rats. Spleen samples w...

We examined the natural population structure of the Turkish hamster (Mesocricetus brandti) by analysing partial mitochondrial sequences of the control region and the cytochrome b gene. Evolutionary lineages were defined on haplotype clusters in genetic trees and a median-joining network. Most significant divergence events in M. brandti nested in th...

Variation of ten non-metric traits was studied on the skulls of 244 specimens of the forest dormouse (Dryomys nitedula) from eight populations inhabiting the region of Central Anatolia in Asia Minor, the South-eastern part of the Balkan Peninsula and Central Southeast Europe. It was demonstrated that genetic variation and divergence among populatio...

Speciation and the phylogenetic relationships of species in the Guentheri Group in Turkey, which have a diploid chromosome number of 54, were studied using mitochondrial mt-co1, mt-cyb and 12S rRNA gene markers. A Bayesian Markov chain Monte Carlo (MCMC) tree clearly separated the Thrace and western and southeastern Anatolia populations. Genetic di...

Geographical variation and intraspecific taxonomy of forest dormouse (Dryomys nitedula) has not yet been investigated adequately, and its population epigenetic uniqueness and the status of many subspecies require clarification. To advance knowledge on the interspecies variety of forest dormouse, we studied the epigenetic cranial polymorphism in eig...

Abstract: Allozyme variations of Tristram’s jird Meriones tristrami, which is distributed in the steppe and semiarid areas of Turkey, were studied using 24 loci of 83 specimens from ten locations in Turkey. Seven loci were found to be polymorphic. According to the patterns of allozyme variation, the percentage of polymorphic loci was 12.5. FST was...

We used transmission electron microscopy to examine the cytotoxic effects of the second-generation anticoagulant rodenticides difenacoum and brodifacoum on rat liver. A single dose of difenacoum or brodifacoum was administered to rats by gastric gavage and liver samples were taken after 24 h, four days or seven days. In the livers of rats treated w...

Abstract: There are twelve Microtus species in Turkey and two of them are endemic to the steppic central Anatolian plateau. In this study, previously collected specimens that were recorded as Microtus irani from southeastern Turkey were reevaluated by karyologically comparing different species distributed throughout southeastern Turkey. The taxonom...

The bank vole, Myodes glareolus, lives in deciduous forests throughout the Palearctic region. In Turkey, this species is distributed only in northern Anatolia (the Black Sea region) where these forests exist. This study reveals genetic differentiation among bank vole populations based on two regions of mitochondrial DNA (cytochrome b and D-loop). P...

Öz In this study, Mesocricetus brandti (Nehring, 1898) specimens collected from different area of Anatolia (Şebinkarahisar, Bolkar Mountain, Aksaray, Ardahan, Van) and Iran- Zanjan were examined. Chromosomal arrangements of these individuals were analyzed by using colchicine- hypotonic citrate karyotype technique. Diploid chromosome numbers of who...

Three species of ” Guentheri Group Voles ” : Microtus guentheri (Southeastern Anatolia), Microtus lydius (Central and Western Anatolia) and Microtus hartingi (Turkish Thrace) in Turkey were investigated due to enlight their suspected taxonomic status and phylogenetic relationships. By using 57 specimens from 15 localities, approximately 730 bp sequ...

M. tristrami is widely distributed in the Anatolian steppe with six geographic races. Allozyme findings show heterozygosity deficiency that as known Wahlund effect. Also the mean Fst value was found to be high, meaning that subpopulations genetically support genetic differentiation of the total population, and accordingly, the Nm value is calculate...

The presence of sibling vole species (Microtus) in the most common forests and open landscapes in south-eastern part of Thrace (Balkan Peninsula) of contemporary territories of Bulgaria and Turkey was studied. Only the southern vole (Microtus levis) was found in the investigated region. In his northern part, the Southern vole is associated with sem...

We performed this study to reveal phylogenetic relationships among Meriones tristrami populations of Turkey by Restriction Fragment Length Polymorphism (RFLP) Method. 19 specimens from 9 localities were used in analysis. By using of 4 different restriction enzymes, polymorphism of mitochondrial cyt-b was revealed. Nei’s gene diversity value reflect...

This study analyzed variations of four vole taxa from Anatolia and Southeastern Balkan Peninsula, i.e. Microtus guentheri guentheri, Microtus lydius lydius, Microtus lydius ankaraensis and Microtus hartingi strandzensis, on the basis of 32 qualitative non-metric skull characters. The degree of polymorphism was analyzed by computing the Epigenetic V...

This study aims to represent the first report on population variation of 20 non-metric skull characters in East European vole (Microtus levis) from the Balkan (populations from Northern Dobruja; Southern Dobruja; East part of the Danube Plain; North-east Trace; Sofia field; South-east Trace) and Anatolian peninsulas (populations from North-west Ana...

Allozymic variability of 24 loci was compared in the genus Meriones representing 5 species in Turkey. The phylogenetic relationship of these Meriones species was established according to the variations of twelve polymorphic loci (Ald, Ldh, α-Gpdh, Ca-1, Ca-2, Gpi, Me, Mpi, G6pdh, Ldh-1, Sod, Ak). According to the patterns of allozyme variation, the...

The Bearded Tit (Panurus biarmicus) is a small passerine bird occurring only in wetland habitats. Three subspecies of the Bearded Tit are known from Turkey. The endemic subspecies Panurus biarmicus kosswigi has only been recorded from Amik Lake in Turkey. This subspecies is now considered extinct; the apparent cause of this extinction was the droug...

Past climatic fluctuations influenced forest habitats and impacted heavily the distribution of forest species, such as the edible dormouse, by changing the distribution and composition of forests themselves. Such effects may be valid for ongoing climate change as well. To improve our understanding of the edible dormouse's history and how it respond...

The taxonomic status of Microtus guentheri, which is distributed in Anatolia, and the related taxa (num- ber of chromosomes 2n = 54) inhabiting Western Anatolia and Southeast Thrace within the territory of Bulgaria and Turkey, were investigated morphologically and statistically. It was determined that the form of the second upper molar in all studi...

Biometric and allozymic variations were analysed in three populations of Dryomys nitedula one population of Dryomys laniger from Turkey. Multivariate analysis of 32 external and cranial measurements was performed on 44 specimens. Of the morphometric variables, twenty-six characters were found to be significantly different between both species (Tuke...

The waterbirds at 2 wetlands (Lakes Aksehir-Eber and Koycegiz) in western Turkey were compared to determine their spatial and temporal distributions along with their habitat characteristics. The waterbirds were evaluated according to whether they were residents, winter migrants, summer migrants, or transit migrants and were assigned to foraging beh...

Allozyme variation was investigated by the electrophoretic analysis of 24 gene loci in three subspecies of Meriones tristrami from Western Anatolia. Twenty of the twenty-four loci were monomorphic among populations, whereas four loci were polymorphic. The mean value of the Wright’s fixation index was FST = 0.0671, suggesting the existence of a slig...

12th Rodens et Spatium Zonguldak, Turkey, 19-23 July 2010

The genus Microtus consists of 65 extant species, making it one of the rodentia genera with the highest number of species. The extreme karyotype diversification in Microtus has made them an ideal species group for comparative cytogenetics and cytotaxonomy. Conventional comparative cytogenetic studies in Microtus have been based mainly on chromosoma...

The genetic diversity of 22 allozyme loci was investigated in 33 wild rat (Rattus norvegicus) specimens from 4 sub-populations. Eight of the 22 loci (Pgm, Hk, Me-M, Ldh, alpha-Gpdh-1, alpha-Gpdh-2, Fum, Xdh) were polymorphic. The level of genetic variation was measured by mean number of alleles per locus (A = 1.18), percentage of polymorphic loci (...

We employed RAPD (Randomly Amplifi ed Polymorphic DNA Marker System) to Apodemus mystaci-nus, rocky mouse widely distributed in Turkey, in order to explore the genetic variation. A total of 60 RAPD markers were tested, 14 primers were selected and 154 polymorphic DNA bands were analysed. The estimated genetic diversity for A. mystacinus populations...

On the basis of karyologically identified individuals of the common vole Microtus arvalis and the sibling vole Microtus rossiaemeridionalis from Europe and the Asiatic part of Turkey, a canonical craniometric classification function for the differentiation of these sibling species was worked out. The function is sex-independent and includes four cr...

Daily activity rhythms are nearly universal among animals and their specific pattern is an adaptation of each species to its ecological niche. Owing to the extremely consistent nocturnal patterns of activity shown by golden hamsters (Mesocricetus auratus) in the laboratory, this species is a prime model for studying the mechanisms controlling circa...

The Turkish black rat “Rattus rattus” shows variation in coat colour corresponding to the occurrence of three subspecies with intermediate colour stages: Rattus rattus rattus, Rattus r. alexandrinus and Rattus r. frugivorus. Turkish black rat populations were divided geographically into six sub-populations: Rr1= Northwest Anatolia, Rr2= Central Ana...

The Greater Noctule, Nyctalus lasiopterus, was recorded from southwestern Turkey for the third time. The dorsal fur of the Greater Noctule, which also covers the underpart of the wing membrane, along with the forearm and propatagium, is uniformly dark brown. The cranium shows typical characteristics of the noctule bats. In addition to these, the ex...

The Turkish black rat "Rattus rattus" shows variation in coat colour corresponding to the occurrence of three subspecies with intermediate colour stages: Rattus rattus rattus, Rattus r. alexandrinus and Rattus r. frugivorus. Turkish black rat populations were divided geographically into six sub-populations: Rr1= Northwest Anatolia, Rr2= Central Ana...

Specimens of Mesocricetus brandti were observed in order to assess the onset of hibernation and the inhibition rate of superoxide dismutase (SOD). The first individual began to hibernate on November 2 and the last animal awoke on May 5. Individual hibernation bouts varied from 8 to 63 days, and the longest uninterrupted hibernation was 4 days. In t...

We report a new species of Spermophilus (Rodentia: Sciuridae), here designated as S. torosensis sp. nov., distributed in the Taurus Mountains in southern Anatolia, Turkey. A total of 161 specimens of the genus Spermophilus from Turkey and Iran were analyzed for their morphological, morphometric, and karyological characteristics. Uni- and multi-vari...

We report a new species of Spermophilus (Rodentia: Sciuridae), here designated as S. torosensis sp. nov., distributed in the Taurus Mountains in southern Anatolia, Turkey. A total of 161 specimens of the genus Spermophilus from Turkey and Iran were analyzed for their morphological, morphometric, and karyological characteristics. Uni-and multi-varia...

We report a new species of Spermophilus (Rodentia: Sciuridae), here designated as S. torosensis sp. nov., distributed in the Taurus Mountains in southern Anatolia, Turkey. A total of 161 specimens of the genus Spermophilus from Turkey and Iran were analyzed for their morphological, morphometric, and karyological characteristics. Uni-and multi-varia...

A total of 253 specimens belonging to the genus Apodemus were examined from 45 localities in Turkey based on morphometric and biochemical analyses. Six different Apodemus species were distributed; A. sylvaticus was recorded only from Thrace (European part of Turkey), A. iconicus throughout Turkey, except Thrace and south-eastern Anatolia, A. flavic...

The migration and some bio-ecological characteristics of a house martin (Delichon urbica) population, which has established colonies under bridges over the Kızılırmak River near Köprüköy village (Kırıkkale), were investigated in 2003 and 2004. These house martins were observed from the beginning of April to the first week of September, when they mi...

We report a new species of Spermophilus (Rodentia: Sciuridae), here designated as S. torosensis sp. nov., distributed in the Taurus Mountains in southern Anatolia, Turkey. A total of 161 specimens of the genus Spermophilus from Turkey and Iran were analyzed for their morphological, morphometric, and karyological characteristics. Uni- and multi-vari...

The reproductive biology and postnatal development of Microtus rossiaemeridionalis were investigated based on field and laboratory observations. This vole preferred humid meadows, and its burrow was complex with several entrances. The breeding season of this species was between December and October, and lasted 11 months. Pregnancy lasted 20-21 days...

Allozyme variations were investigated by the electrophoretic analysis of 20 gene loci in 5 populations of Mesocricetus brandti and Mesocricetus auratus from Anatolia and Iran. Of the 20 loci analysed, 11 were monomorphic and fixed for the same allele in all 5 populations, 9 loci were polymorphic, and 1 locus differed between M. auratus and M. brand...

The esterase enzyme system (Est) of 44 specimens of the rocky mouse, Apodemus mystacinus, from 10 localities in Turkey was analyzed using polyacrylamide gel electrophoresis. Three loci Est-1, Est-2, and Est-3 were determined. There were two alleles in Est-1 and four alleles in Est-2 and Est-3. The Shannon information index (I) ranged from 0.21 to 0...