Yazar "Albayrak, Irfan" seçeneğine göre listele
Listeleniyor 1 - 20 / 24
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Banded karyotypes of the Persian squirrel Sciurus anomalus from Turkey(Firenze Univ Press, 2008) Arslan, Atilla; Albayrak, Irfan; Oshida, TatsuoKaryotypes of seven males and three females of the Persian squirrel, Sciurus anomalus, were analyzed with G- and C-banding techniques and Ag-NOR (nucleolus organizer region) staining. All specimens had the diploid number (2n) of 40 and fundamental autosomal arm number (FN) of 76. The autosomal complement comprised 6 pairs of metacentrics and 13 pairs of submetacentrics. The X chromosome was a medium-sized metacentric. The Y chromosome was a small submetacentric. In the C-banded karyotype, except for centromeric heterochromatin, heterochromatin blocks were absent. Only the terminal region of one medium-sized metacentric pair had detectable Ag-NORs. The uniqueness of the chromosomal characteristics of S. anomalus suggests that S. anomalus is distantly related to the other Old World Sciurus species (S. lis and S. vulgaris).Öğe C-Banded Karyotype and Nucleolar Organizer Regions (NORs) of Wild Boar, Sus scrofa (Artiodactyla: Suidae) from Anatolia(Tubitak Scientific & Technical Research Council Turkey, 2009) Arslan, Atilla; Albayrak, IrfanThe present study reports the karyotype, C-banding, and nucleolar organizer regions (NORs) of 6 Sus scrofa (Linnaeus, 1758) males from Anatolia. The karyotype of S. scrofa comprised (2n) 38 chromosomes, the number of chromosomal arms (FN) was 64, and the number of autosomal arms (FNa) was 60. C-positive regions appeared to be restricted to the centromeric regions of autosomes 1, and 13-18. and the entire long arm of the Y chromosome. Some autosomes had very slight C-bands. The X chromosome appeared to be entirely euchromatic. NORs were identified by the silver-staining technique and were observed on secondary constriction sites of 2 metacentric chromosomes pairs.Öğe C-banding and Ag-NOR distribution patterns in Euphrates jerboa, Allactaga euphratica (Mammalia: Rodentia), from Turkey(Walter De Gruyter & Co, 2012) Arslan, Atilla; Yorulmaz, Tarkan; Toyran, Kubilay; Albayrak, Irfan; Zima, JanA chromosomal study of Allactaga euphratica from the Sanliurfa Province in Southeast Anatolia, Turkey, was performed. The diploid number of 48 chromosomes was found in all four specimens examined. The C-band-positive regions were distributed in centromeric areas of all the autosomal pairs and the X chromosome. Extensive C-positive heterochromatin intercalary blocks were observed in the largest pair of autosomes. The small Y chromosome was stained uniformly and C-negatively. The active nucleolus organizer regions (NORs) were localized in two pairs of small bi-armed autosomes. The C-heterochromatin distribution and localization of the secondary constrictions bearing NORs apparently differ between karyotypes of the related jerboa species A. euphratica and Allactaga williamsi. This cytogenetic difference may be implied as a suitable marker in further studies of the relationships in contact zones and possible hybridization between these two taxa.Öğe C-heterochromatin and NORs distribution in karyotypes of three vespertilionid bat species from Turkey(Walter De Gruyter Gmbh, 2015) Arslan, Atilla; Zima, Jan; Albayrak, Irfan; Yorulmaz, Tarkan; Arslan, EmineThe chromosomal banding analysis of the karyotypes of Turkish populations of Eptesicus serotinus, Nyctalus lasiopterus and Barbastellus barbastellus was performed with the use of C-banding and Ag-NOR staining. The results obtained in E. serotinus and N. lasiopterus were congruent with previous data reported from other regions. The karyotype of E. serotinus (2n = 50, NF = 52) contained a moderate amount of centromeric C-heterochromatin and a single NOR was localized in an acrocentric autosomal pairs. The karyotype of N. lasiopterus (2n = 42, NF = 54) contained a higher amount of centromeric C-heterochromatin and the NORs were localized in two autosomal pairs. The karyotype of B. barbastellus was standard in its general characteristics (2n = 32, NF = 54, low amount of C-heterochromatin) but the NOR was localized in only one acrocentric autosomal pair. In studies from other regions, the NORs were recognized in all five acrocentric autosomal pairs of the complement of B. barbastellus.Öğe C-Heterochromatin and nucleolus organizer region distribution of Myotis emarginatus (Chiroptera: Vespertilionidae) from Turkey(Tubitak Scientific & Technical Research Council Turkey, 2020) Albayrak, Irfan; Saricam, Tugba; Arslan, AtillaIn this study, the banded karyotypes (C- and Ag-nucleolus organizer regions (NORs)) of Myotis emarginatus in Turkey were determined for the first time. The karyotype contained 44 chromosomes, the number of chromosomal arms (NF) was 54, and the number of autosomal arms (NFa) was 50. Slight C-heterochromatic blocks were observed in the centromeric regions of some autosome pairs, whereas the sex chromosomes were euchromatic. The Ag-NORs were detected in the short arms of a large and a medium-sized acrocentric autosome. The distribution of C-heterochromatin regions in Turkish populations of M. emarginatus is similar to those reported in some other Myotis species.Öğe A comparative study of the reproductive activities of European hare (Lepus europaeus) populations in Turkey(Tubitak Scientific & Technical Research Council Turkey, 2015) Demirbas, Yasin; Albayrak, IrfanTo explore whether the reproductive cycle of Lepus europaeus differs within Turkey, a total of 182 hares from Turkish Thrace (transition climate), Central Anatolia (continental climate), the Black Sea (oceanic climate), and the Turkish Mediterranean (Mediterranean climate) were collected between June 2006 and September 2014. We present the length of breeding season, sex ratio, mean litter size, and testicle position of European hares distributed in Turkey for the first time. Among these features, length of breeding season and mean litter size of European hares showed moderate variation in Turkey.Öğe A contribution to the age-class determination of Martes foina erxleben, 1777 from Turkey (Mammalia : Carnivora)(Tubitak Scientific & Technical Research Council Turkey, 2008) Albayrak, Irfan; Ozen, Ahmet Selcuk; Kitchener, Andrew CharlesThis study was based on 57 beech marten (Martes foina) specimens collected in Turkey between 1994 and 1998. The specimens were divided into 3 age classes as young, juvenile, and adult on the basis of the morphology of the sagittal and lambdoidal crests, and temporal ridges, relative lengths of the interorbital and postorbital constrictions, the degree of wear in molar and canine teeth, baculum weight and structure, pelage color, cranial and bacular measurements, and field notes concerning sexual maturity and lactation. Young, juvenile and adult specimens were readily identified by the shape of the temporal ridges on the skull. These ridges are formed by the origination of the temporalis muscles on the parietal bones and are parallel in the youngs, U- or V-shaped in juveniles, and Y-shaped in adults.Öğe Cytogenetic Study on Microtus guentheri (Danford and Alston, 1880) (Mammalia: Rodentia) from Turkey: Constitutive Heterochromatin Distribution and Nucleolar Organizer Regions(Polish Acad Sciences, Inst Systematics Evolution Animals, 2011) Baydemir, Nurse Asan; Albayrak, Irfan; Gozutok, SerdarConventionally stained, C- and Ag-NOR banded karyotypes of Guenther's vole, Microtus guentheri were studied from Turkey. The species possesses a karyotype of 2n=54, NFa=52 and NF=54 in specimens from Kahramanmaras and Gaziantep provinces, whereas NF=56 in females and NF=55 in males were found in individuals from Kirikkale and Nevsehir provinces. The X chromosome was a large acrocentric (NF=54) or submetacentric (NF=55, 56) while the Y chromosome was a small telocentric in all specimens examined. Blocks of constitutive heterochromatin were located in the pericentromeric areas of autosomes including the X chromosome. Nucleolar organizer regions (NORs) were located at the telomeric regions of the short arms of five acrocentric pairs and centromeric regions of two telocentric pairs in the Nevsehir and Kirikkale specimens.Öğe Cytogenetic study on the European brown hare (Lepus europaeus Pallas, 1778) (Mammalia: Lagomorpha) in Turkey(Tubitak Scientific & Technical Research Council Turkey, 2010) Demirbas, Yasin; Asan, Nursel; Albayrak, IrfanConventional and GTC, CTC, and AgNO3 banded karyotypes of brown hares (Lepus europaeus Pallas, 1778) from Turkey are described for the first time. All specimens possessed a diploid number of 2n = 48 chromosomes and a fundamental autosomal number of NFa = 88. The chromosome set consisted of 8 metacentric and submetacentric pairs and 15 subtelocentric and acrocentric pairs decreasing in size from large to small. The X chromosome was a large submetacentric while the Y was a small acrocentric. In contrast with the other specimens, the Kilts specimen possessed a duplication in the long arm of one of the subtelocentric chromosomes. The G-banding pattern of the chromosomes was similar to that given for the genus. Variation was found in the C-banded karyotype and the distribution of NORs.Öğe Ecological Preferences of the Anatolian Vole Microtus anatolicus (Rodentia: Cricetidae), an endemic species of the Anatolia(Foundation Environmental Protection & Research-Fepr, 2011) Yavuz, Mustafa; Oz, Mehmet; Albayrak, IrfanIn this study, from June to July 2007, habitat type and characteristics of Microtus anatolicus an endemic species of the Anatolia was investigated. Of the caught 79 samples, 63 (29 male male +34 female female) were dead individuals and 16 (7 males +9 females) were alive from four localities (Kozan, Bozdogan, Cevizli and Derekoy). Also Cevizli and Derekoy are first records for species. There were no differences between sexes for snaptrapping and livetrapping (chi(2)(snaptrapping)=0.20; p=0.66 ve chi(2)(livetrapping)=0.13; df=1; p=0.72). On the other hand, there were strong positive correlations between the capture frequencies in traps (snap and livetrap), also population density and the altitude of localities (rsnaptrapping=0.742; n=4; p=0.023, r(snaptrapping)=0.785; n= 4; p= 0.037 ve r(density)=0.933; n=6; p=0.009). M. anatolicus lives in dry and narrow nesting areas at small colonies. In the areas, observed that nesting in with slopes of 0-20 degrees at sunny south-facing areas. All of 63 dead and all of 16 alive individuals were caught on the south-facing (south, southeast, and southwest) exposures, but not north-facing areas. Also 98.94% of population density in South-facing areas.Öğe Ecological Preferences of the East European Vole Microtus levis (Rodentia: Cricetidae) in the West Mediterranean Region at Eleven New Localities(Foundation Environmental Protection & Research-Fepr, 2011) Yavuz, Mustafa; Oz, Mehmet; Albayrak, IrfanIn this study, from July to September 2007, habitat type and characteristics of Microtus levis was investigated. Of the caught 98 samples, 76 (52 males +24 females) were dead individuals and 22 (13 males + 9 females) were alive from eleven localities (Seki, Yazir, Korkuteli, Bozova, Kizilkaya, Kozan, Kocaaliler, Bozdogan, Gebiz, Kasimlar and Derebucak). Also all of this localities are first records for species. There were statisticaly significant between sexes for snaptrapping but no differences for livetrapping (chi(2)(snaptrapping) = 5.34, df = 1, p = 0.02 and chi(2)(livetrapping) = 0.37, df = 1, p = 0.54). On the other hand, there were strong positive correlations between the capture frequencies in traps (snap and livetrap), also population density and the altitude of localities (r(snaptrapping) = 0.750; n = 11; p = 0.031, r(livetrapping) = 0.918; n = 11; p = 0.041 and r(density) = 0.912; n = 11; p = 0.001). M. levis lives in wet places and near the brook and river at colonies. In the areas, observed that nesting in with slopes of 31-60 degrees at sunny south-facing areas. 64 of 76 dead and 20 of 22 alive individuals were caught on the south-facing (south, southeast, and southwest) exposures. Also 94.05% of population density in South-facing areas.Öğe G-banding karyotypes of Myotis myotis (Borkhausen, 1797) and Myotis blythii (Tomes, 1857) (Mammalia: Chiroptera) in Turkey(Tubitak Scientific & Technical Research Council Turkey, 2011) Asan, Nursel; Albayrak, Irfan; Yorulmaz, Tarkan; Inci, SinanThis study is based on the G-banding karyotype of 2 sibling bat species Myotis myotis (Borkhausen, 1797) (Greater Mouse-eared Myotis) and M. blythii (Tomes, 1857) (Lesser Mouse-eared Myotis) distributed in Turkey. G-banding karyotypes showed that the 2 taxa possessed identical G-banded chromosome arms. It was concluded that G-banded chromosomes are not sufficient as a diagnostic character for separating M. myotis from M. blythii.Öğe Investigation of blood cells of Miniopterus schreibersii (Mammalia: Chiroptera) in Turkey(Tubitak Scientific & Technical Research Council Turkey, 2019) Saricam, Tugba; Albayrak, IrfanThis research was based on some characteristics of the erythrocyte and leukocyte cells of 9 Miniopterus schreibersii (female female) samples collected from Balikesir Province in Turkey between July 2015 and September 2016. Bats were caught from an artificial cave using special nets. Blood was taken in heparinized hematocrit tubes from the forearm or tail membrane in the laboratory and the blood smears were prepared. The erythrocyte and leukocyte counts, hemoglobin concentration, and hematocrit values in the blood were determined. In M. schreibersii, the number of erythrocytes in 1 mm(3) of blood was between 7.5 and 10 million, and the mean value was 8.8 million. The diameter values of the erythrocyte, monocyte, lymphocyte, eosinophil, neutrophil, and basophil cells were measured as 5.65, 9.66, 8.4, 8.66,10, and 8.5 mu m, respectively. Blood values of M. schreibersii were recorded for the first time in this study in Anatolia.Öğe Karyotypic studies of Meriones dahli Shidlovsky, 1962 (Rodentia: Muridae) from Turkey(Univ Florence Botany Inst, 2011) Baydemir, Nursel Asan; Demirbas, Yasin; Pamukoglu, Nahit; Albayrak, Irfan; Yagci, TubaIn this study, conventionally stained, C- and Ag-NOR banded karyotypes of Dahl's jird, Meriones dahli, were reported from Turkey. The species had a karyotype of 2n=50, NFa=74 and NF=78. The X and Y chromosomes were submetacentrics in all specimens examined. Blocks of constitutive heterochromatin were located in the pericentromeric areas of autosomes including the X and Y chromosomes. Interstitial C- bands are also detected in the long arms of one of the largest acrocentric pairs. Nucleolar organizer regions (NORs) were located at the telomeric regions of the short arms of three submetacentrics and two acrocentrics.Öğe Natural history of the Egyptian fruit bat, Rousettus aegyptiacus in Turkey (Mammalia: Chiroptera)(2008) Albayrak, Irfan; Aşan, Nursel; Yorulmaz, TarkanAspects of the ecology, karyology, and taxonomic status of the Egyptian fruit bat Rousettus aegyptiacus, in the Mediterranean region of Turkey were investigated based on 41 specimens obtained between 1977 and 2003. Distribution, external and cranial morphometrics, pelage coloration, baculum morphology, karyology, colony size, roosting and feeding ecology, and conservation and management issues were recorded. The fruit bat in Turkey is represented by the nominate subspecies, R. a. aegyptiacus. Sexual dimorphism was recorded in pelage coloration and morphometric data. The aiploid number of chromosomes (2n) is 36. Records of feeding behavior were obtained from both field and laboratory studies. Seasonal changes in diet were recorded in both wild and cultivated fruits, including Persian lilac (Melia azadirachta), rubber tree (Ficus elastica), plum (Prunus sp.), loquat (Eriobotrya japonica), apple (Malus sp.), fig (Ficus carica), pomegranate (Punica granatum), grape (Vitis viniferia), persimmon (Diosyros kaki), date (Phoenix dactylifera), mulberry (Morus sp.), cherry (Prunus sp.), peach (Prunus persica), apricot (Prunus sp.), and citrus (Citrus sp.). It was determined that the fruit bats in Turkey reproduce in late August. © TÜBİTAK.Öğe New record of Lynx lynx (L., 1758) in Turkey (Mammalia: Carnivora)(Tubitak Scientific & Technical Research Council Turkey, 2012) Albayrak, IrfanThis paper reports the morphological characteristics of a subadult lynx, Lynx lynx, collected in 2005 from Ardanuc in Artvin Province. Pelage color, hair structure, and some cranial measurements of this specimen and other recent records of Turkish lynxes are given, including that from Beyaz Dag in Sirnak Province in the southeastern part of Turkey collected during field work and a skin from an unknown locality in Isparta. It was concluded that Turkish lynxes are likely to represent the subspecies L. lynx dinniki based on a comparison of morphometric values given in the literature.Öğe Nucleolar organizer regions (NORs) in Cricetulus migratorius (Pallas, 1773) and Meriones tristrami Thomas, 1892 (Mammalia: Rodentia) from Central Anatolia(Tubitak Scientific & Technical Research Council Turkey, 2010) Asan, Nursel; Albayrak, Irfan; Demirbas, Yasin; Yorulmaz, Tarkan; Toyran, Kubilay; Gozutok, SerdarThe distribution of nucleolar organizer regions (NORs) in Cricetulus migratorius and Meriones tristrami from Central Anatolia was determined. In the karyotype of Cricetulus migratorius the diploid number, fundamental number, and fundamental autosomal number are 22, 44, and 40, respectively. The diploid number, fundamental number, and fundamental autosomal number of Meriones tristrami are 72, 84, and 80, respectively. In Cricetulus migratorius, NORs occur in the telomeric regions of metacentric and subtelocentric autosome pairs. Furthermore, terminally located NORs in metacentric and acrocentric autosomes of Meriones tristrami are presented in this present paper.Öğe On tooth anomalies and the loss of Canis lupus (Mammalia: Carnivora) in Turkey(Tubitak Scientific & Technical Research Council Turkey, 2019) Ay, Elif Yildiz; Albayrak, IrfanBecause of their feeding habits, which are affected by their ranking in the last steps of the food chain, the teeth of carnivores are subjected to great forces during the breaking up and chewing of food when they are hunting. In this sense, missing teeth and tooth anomalies are common in carnivores. This research was based on an examination of the properties of the tooth structures of 25 wolf specimens collected in Turkey between 2014 and 2018. In this study, the excess and missing teeth, tooth fracture, and root anomalies in the lower and upper jaw of the head skeletons from an adult age group were examined in detail. Some anomalies, defined as the supernumerary tooth, additional roots, and fusion roots, were found in 4 skulls; tooth loss was found in 6 skulls; tooth fractures were found in 7 skulls; and tooth remains were found in 4 skulls. Fusion roots, supernumerary teeth, and additional roots were among the important variations in dentition. Tooth loss, fractures, and remains, and dental anomalies were determined in approximately 56% of the specimens in this study. It can be conclusively stated that dental anomalies were frequently encountered in wolves in the Palaearctic Region.Öğe Some hematological parameters in Myotis myotis and Myotis blythii (Mammalia: Chiroptera) in Turkey(Tubitak Scientific & Technical Research Council Turkey, 2016) Albayrak, Irfan; Bagatur Ozcan, Hava; Baydemir, MerveIn this study the reference ranges belonging to some hematological parameters of Myotis myotis and Myotis blythii, collected from three localities in Turkey in 2012 and 2013, are given for the first time. Bats were caught using a special bat net and they were released after the required amount of blood sample was taken. In Myotis myotis, erythrocyte diameter was recorded as 5.04 mu m and the number of erythrocytes and leukocytes in 1 mm(3) of blood was 11.35 x 10(6) and 4865, respectively. While the hemoglobin level was 14.9 g/dL, the hematocrit value was measured as 57.0%. The other values were as follows: mean cell volume (MCV) 52.40 fL, mean cell hemoglobin (MCH) 13.70 pg, mean cell hemoglobin concentration (MCHC) 23.30%, and amount of total protein 10.5 g/L. In Myotis blythii specimens, erythrocyte diameter was recorded as 5.69 mu m and the number of erythrocytes and leukocytes in 1 mm(3) of blood was 14.52 x 10(6) and 4296, respectively. While the hemoglobin level was 13.09 g/dL, the hematocrit value was measured as 60.20%. The other values measured as follows: MCV 43.67 fL, MCH 9.70 pg, MCHC 21.70%, and amount of total protein 10.625 g/L.Öğe Spatial genetics of brown hares (Lepus europaeus Pallas, 1778) from Turkey: Different gene pool architecture on either side of the Bosphorus?(Elsevier Gmbh, 2019) Demirbas, Yasin; Albayrak, Irfan; Koca, Ayca Ozkan; Stefanovic, Milomir; Knauer, Felix; Suchentrunk, FranzWe determined allelic variation at eleven microsatellite loci to study the effect of the Bosphorus, the Sea of Marmara, and the Dardanelles on the population genetic architecture of brown hares, Lepus europaeus, from Anatolia and Turkish Thrace in the southeastern most Balkans. The latter region was connected with Anatolia during periods of the late Pleistocene and the early Holocene (until ca. 8000 y BP) enabling natural gene flow. Following a recent mitochondrial (mt) DNA-based phylogeographic model that suggested unidirectional ancient gene flow from Anatolia to the SE Balkans, we expected lower genetic diversity in hares from Turkish Thrace than Anatolia. The Turkish Thrace population might have been established only relatively recently as natural northwestward expansion of a long existing Anatolian population. Alternatively, it might have received late Pleistocene or Holocene gene flow by hares from eastern Europe from north of the Black Sea, even after the formation of the marine barrier. This might have produced a notable genetic distinction between the hares from either side of the Bosphorus, the Sea of Marmara, and the Dardanelles. We found significantly lower allelic richness in hares from Turkish Thrace than Anatolia, very little genetic admixture in the Turkish Thrace population, and only one allele at low frequency in Turkish Thrace that was not observed in Anatolian hares. On the contrary, many alleles of Anatolian hares were not recovered in hares from Turkish Thrace. Nevertheless, genetic divergence (Fst, Cavalli-Sforza & Edwards distances, AMOVA) between the hares from either side of the current marine barrier was low (Fst values <10%). All findings accord to our initial hypothesis that the hares from Turkish Thrace represent merely a somewhat genetically depleted version of the Anatolian hares. Seemingly, no strong drift has occurred in the Turkish Thrace population since the break-up of the Holocene landbridge, and there is no indication of gene flow from other regions in (eastern) Europe into the Turkish Thrace population. Spatial genetic approaches and standard population genetics (BAPS, GENELAND, STRUCTURE, F-statistics, Cavalli-Sforza & Edwards distances) indicated significant spatial genetic differentiation of hares across Anatolia, but also on a very low level. Overall, our results are concordant with the latest mtDNA based model of ancient gene flow in hares only from Anatolia to the southeastern Balkans across the Pleistocene and early Holocene landbridge; this implies that most or all of the Balkans have been colonized by hares exclusively originating eventually from Anatolia. (C) 2018 Deutsche Gesellschaft fur Saugetierkunde. Published by Elsevier GmbH. All rights reserved.
