| state-dependent foraging: lactating voles adjust their foraging behavior according to the presence of a potential nest predator and season. | parental care often produces a trade-off between meeting nutritional demands of offspring and the duties of offspring protection, especially in altricial species. parents have to leave their young unattended for foraging trips, during which nestlings are exposed to predators. we investigated how rodent mothers of altricial young respond to risk of nest predation in their foraging decisions. we studied foraging behavior of lactating bank voles (myodes glareolus) exposed to a nest predator, the co ... | 2017 | 25926712 |
| the nerve cells of the neostriatum in the common shrew (sorex araneus) and bank vole (clethrionomys glareolus): a golgi comparative study. | the studies were carried out on 12 brains derived from adult representatives of two mammalian orders, insectivora and rodentia. the neostriatum was compared in the common shrew (sorex araneus) and bank vole (clethrionomys glareolus). three main types of striatal neuron were distinguished in the common shrew and five types of neurons in the bank vole. the fifth type of bank vole neurons was additionally divided into two subtypes with respect to dendritic pattern. | 2007 | 17533595 |
| the neuronal structure of the dorsal nucleus of the lateral geniculate body in the common shrew (sorex araneus) and the bank vole (clethrionomys glareolus): golgi and nissl studies. | the topography and neuronal structure of the dorsal nucleus of the lateral geniculate body (gld) of the common shrew and the bank vole are similar. the lateral geniculate body of both the species examined has a homogeneous structure and no observable cytoarchitectonic lamination. on the basis of the shape of the dendritic arbours as well as the pattern of dendritic arborisations the following two types of neurons were distinguished. type i "bushy" neurons that have multipolar or round perikarya ... | 2006 | 17171615 |
| lack of a distinct gradient in biomarker responses in small mammals collected at different distances from a highway. | this study describes biomarker effects in small mammals exposed to traffic emissions. animals were collected at 10-50 m (site 1), 150-200 m (site 2), and 5 km (site 3) from a very busy highway (a2). to distinguish between routes of exposure, strictly carnivorous common shrews ( sorex araneus) and predominantly herbivorous bank voles ( clethrionomys glareolus) were collected. as a measure of exposure to polycyclic aromatic hydrocarbons (pahs), aromatic dna adduct levels were determined by (32)p-p ... | 2002 | 12202932 |
| effects of ash application on cadmium concentration in small mammals. | in order to assess the effects of wood ash application to forests on small mammals, we collected bank voles (clethrionomys glareolus) and common shrews (sorex araneus) from a forest area in southern finland. part of the sample population was from sites that had been treated with ash 1.5 years earlier, part from untreated control sites. the ash increased the soil ph and gave an average cadmium load in soil of 44 g ha(-1). when comparing treated and control areas, we found slightly but significant ... | 2013 | 11837422 |
| [intestinal microflora of sorex araneus araneus l. and clethrionomys glareolus glareolus schreb. in nature conditions. iii. seasonal variations]. | | 2017 | 14460562 |
| [intestinal microflora of sorex araneus araneus l. and clethrionomys glareolus glareolus schreb. in natural conditions. ii. general characteristics of separate strains]. | | 2017 | 14460561 |
| [intestinal microflora of sorex araneus araneus l. and clethrionomys glareolus glareolus schreb. in natural conditions. i. quantitative and qualitative characteristics of the intestinal microflora]. | | 2017 | 14460560 |
| detection of shrew-borne hantavirus in eurasian pygmy shrew (sorex minutus) in central europe. | recently, it was found that not only rodents but also shrews are reservoir hosts of hantaviruses. in central europe, only seewis virus, associated with the eurasian common shrew (sorex araneus), has been recognized until now. in the present report, tissue samples from shrews belonging to crocidurinae and soricinae subfamilies, trapped in czech republic, germany, and slovakia, were screened for the presence of novel hantaviruses. three new hantavirus partial l-segment sequences were obtained from ... | 2013 | 23602837 |
| boginia virus, a newfound hantavirus harbored by the eurasian water shrew (neomys fodiens) in poland. | guided by decades-old reports of hantaviral antigens in the eurasian common shrew (sorex araneus) and the eurasian water shrew (neomys fodiens) in european russia, we employed rt-pcr to analyze lung tissues of soricine shrews, captured in boginia, huta dłutowska and kurowice in central poland during september 2010, 2011 and 2012. | 2013 | 23693084 |
| evolution and postglacial colonization of seewis hantavirus with sorex araneus in finland. | hantaviruses have co-existed with their hosts for millions of years. seewis virus (swsv), a soricomorph-borne hantavirus, is widespread in eurasia, ranging from central siberia to western europe. to gain insight into the phylogeography and evolutionary history of swsv in finland, lung tissue samples of 225 common shrews (sorex araneus) trapped from different parts of finland were screened for the presence of swsv rna. forty-two of the samples were positive. partial small (s), medium (m) and larg ... | 2018 | 29133028 |
| molecular evidence and high genetic diversity of shrew-borne seewis virus in slovenia. | seewis virus, the shrew-borne hantavirus from sorex araneus, has been molecularly detected in reservoir hosts in many different central european countries and russia. slovenia is a known endemic country for rodent-borne hantaviruses, therefore the aim of the study was to investigate the presence of shrew-borne hantaviruses in insectivores. viral l, s and m segment have been recovered only from tissue samples of 7 s. araneus, despite several shrew species were tested. phylogenetic analysis showed ... | 2013 | 23892145 |
| broad geographical distribution and high genetic diversity of shrew-borne seewis hantavirus in central europe. | for a long time hantaviruses were believed to be exclusively rodent-borne pathogens. recent findings of numerous shrew- and mole-borne hantaviruses raise important questions on their phylogenetic origin. the objective of our study was to prove the presence and distribution of shrew-associated seewis virus (swsv) in different sorex species in central europe. therefore, a total of 353 sorex araneus, 59 s. minutus, 27 s. coronatus, and one s. alpinus were collected in germany, the czech republic, a ... | 2012 | 22467179 |
| analysing interspecific associations in parasites: alternative methods and effects of sampling heterogeneity. | the purpose of the present study was (1) to test the ability of six alternative methods to detect random and non-random patterns of overall association in artificial presence/absence data sets, and (2) to analyse overall associations and effects of sampling heterogeneity in four empirical presence/absence data sets of helminths of the common shrew sorex araneus. in the null model, the expected distribution was created by means of a randomisation procedure. application of methods on artificial da ... | 1998 | 28307526 |
| novel polyomaviruses in shrews (soricidae) with close similarity to human polyomavirus 12. | shrews (family soricidae) have already been reported to host microorganisms pathogenic for humans. in an effort to search for additional infectious agents with zoonotic potential, we detected polyomaviruses (pyvs) in common shrew, crowned shrew, and pygmy shrew (sorex araneus, s. coronatus and s. minutus). from these, 11 full circular genomes were determined. phylogenetic analysis based on large t protein sequences showed that these novel pyvs form a separate clade within the genus alphapolyomav ... | 2017 | 29095685 |
| evaluation of the physiological activity of venom from the eurasian water shrewneomys fodiens. | animal toxins can have medical and therapeutic applications. principally, toxins produced by insects, arachnids, snakes and frogs have been characterized. venomous mammals are rare, and their venoms have not been comprehensively investigated. among shrews, only the venom ofblarina brevicaudahas been analysed so far, and blarina toxin has been proven to be its main toxic component. it is assumed thatneomys fodiensemploys its venom to hunt larger prey. however, the toxic profile, properties and mo ... | 2017 | 29026428 |
| venomous mammals. | it is not widely appreciated that mammals can be venomous in the manner of snakes and lizards. however, it was first demonstrated scientifically 50 years ago in the case of the american short-tailed shrew. subsequently, similar evidence has been obtained from european shrews and the haitian solenodon, but research in this area has been almost completely neglected for the last 20 years. in complete contrast to what has been learned about other animal venoms, the identity and mode of action of mam ... | 1992 | 1641406 |
| vocal development during postnatal growth and ear morphology in a shrew that generates seismic vibrations, diplomesodon pulchellum. | the ability of adult and subadult piebald shrews (diplomesodon pulchellum) to produce 160hz seismic waves is potentially reflected in their vocal ontogeny and ear morphology. in this study, the ontogeny of call variables and body traits was examined in 11 litters of piebald shrews, in two-day intervals from birth to 22 days (subadult), and ear structure was investigated in two specimens using micro-computed tomography (micro-ct). across ages, the call fundamental frequency (f0) was stable in squ ... | 2015 | 26112702 |
| [population of hair cells in the corti's organ of shrews]. | in shrews (family soricidase) the organ of corti was examined by means of the surface specimen technique. the analysis of the qualitative deviations from the normal cellular pattern of corti organ was based on more than 160 ears of shrews (sorex araneus, s. minutus, neomys fodiens, and crocidura suaveolens). the dislocation, rotation, malformation of hair cells, and one finding of the giant outer hair cell are described. the quantitative analyses of the population of hair cells are based on 61 e ... | 1978 | 751340 |
| [comparative anatomic studies of the cerebellum of insectivora. ii. the cerebellum of sorex araneus and elephantulus intufi]. | | 2006 | 5399726 |
| short interspersed elements (sines) from insectivores. two classes of mammalian sines distinguished by a-rich tail structure. | four trna-related sine families were isolated from the genome of the shrew sorex araneus (sor element), mole mogera robusta (tal element), and hedgehog mesechinus dauuricus (eri-1 and eri-2 elements). each of these sines families is specific for a single insectivora family: sor, for soricidae (shrews); tal, for talpidae (moles and desmans); eri-1 and eri-2, for erinaceidae (hedgehogs). there is a long polypyrimidine region (tc-motif) in tal, eri-1, and eri-2 elements located immediately upstream ... | 2001 | 11668393 |
| fatty acids in the triglycerides and phospholipids of the common shrew (sorex araneus) and the water shrew (neomys fodiens). | fatty acid composition of the liver, brown fat, thigh muscle and heart of sorex araneus and neomys fodiens was determined by glc and glc-ms. in both species of shrew the total amounts of omega 3-pufas in the phospholipids were greater than those in the triglycerides. sorex araneus, which feeds solely on a terrestrial diet, had a larger total amount of omega 6-pufas in the triglycerides of the brown fat. the phospholipids of the thigh muscle and heart of neomys fodiens, however, contained more om ... | 1995 | 7584849 |
| ultrastructural study on oogenesis in shrews (neomys fodiens, sorex araneus). | the ultrastructure of early follicular oocytes is described. among the differentiating organelles marked development of endoplasmic reticulum, often in close contact with mitochondria, is especially conspicuous. in addition, the dilatation of mitochondria, the accumulation of dense granular material and the formation of multivesicular bodies are discussed. | 1984 | 6702406 |
| [on the comparative anatomy of the cochlea of talpa europaea, sorex araneus and sorex alpinus]. | | 1964 | 14266942 |
| chromosomal rearrangements and gene flow over time in an inter-specific hybrid zone of the sorex araneus group. | most hybrid zones have existed for hundreds or thousands of years but have generally been observed for only a short time period. studies extending over periods long enough to track evolutionary changes in the zones or assess the ultimate outcome of hybridization are scarce. here, we describe the evolution over time of the level of genetic isolation between two karyotypically different species of shrews (sorex araneus and sorex antinorii) at a hybrid zone located in the swiss alps. we first evalu ... | 2009 | 19240751 |
| a hybrid zone with coincident clines for autosomal and sex-specific markers in the sorex araneus group. | in hybrid zones, endogenous counter-selection of hybrids is usually first expressed as reduced fertility or viability in hybrids of the heterogametic sex, a mechanism known as haldane's rule. this phenomenon often leads to a differential of gene flow between sex-linked markers. here, we address the possibility of a differential gene flow for y chromosome, mtdna and autosomal markers across the hybrid zone between the genetically and chromosomally well-differentiated species sorex antinorii and s ... | 2008 | 18355184 |
| leptospira genomospecies and sequence type prevalence in small mammal populations in germany. | leptospirosis is a worldwide emerging infectious disease caused by zoonotic bacteria of the genus leptospira. numerous mammals, including domestic and companion animals, can be infected by leptospira spp., but rodents and other small mammals are considered the main reservoir. the annual number of recorded human leptospirosis cases in germany (2001-2016) was 25-166. field fever outbreaks in strawberry pickers, due to infection with leptospira kirschneri serovar grippotyphosa, were reported in 200 ... | 2018 | 29470107 |
| "european" race-specific metacentrics in east siberian common shrews (sorex araneus): a description of two new chromosomal races, irkutsk and zima. | karyotype studies of common shrews in the vicinity of lake baikal (irkutsk region, eastern siberia) resulted in the description of two new chromosomal races ofsorex araneuslinnaeus, 1758 (lypotyphla, mammalia), additional to 5 races formerly found in siberia. in the karyotypes of 12 specimens from 3 locations, the polymorphism of metacentric and acrocentric chromosomes of the robertsonian type was recorded and two distinct groups of karyotypes interpreted as the chromosomal races were revealed. ... | 2017 | 29302298 |
| cognitive skills of common shrews (sorex araneus) vary with seasonal changes in skull size and brain mass. | in a rare phenomenon, shrews and a few other species cope with seasonal environments by reducing and regrowing brain size, potentially at the cost of changes in cognitive abilities. here, we confirm an extensive seasonal shrinkage (21.4%) and regrowth (17.0%) of brain mass in winter and spring, respectively, in the common shrew (sorex araneusl.) in southern germany. in a spatial learning task experiment, individuals with reduced winter brain size covered larger distances to find food, compared w ... | 2018 | 29170257 |
| dual mechanism of chromatin remodeling in the common shrew sex trivalent (xy1y2). | here we focus on the xy1y2condition in male common shrewsorex araneuslinnaeus, 1758, applying electron microscopy and immunocytochemistry for a comprehensive analysis of structure, synapsis and behaviour of the sex trivalent in pachytene spermatocytes. the pachytene sex trivalent consists of three distinct parts: short and long synaptic sc fragments (between the x and y1and between the x and y2, respectively) and a long asynaptic region of the x in-between. chromatin inactivation was revealed in ... | 2017 | 29114363 |
| profound reversible seasonal changes of individual skull size in a mammal. | postnatal size changes in most vertebrates are unidirectional and finite once the individual reaches full size [1]. in rare cases, changes of body length may occur in response to harsh environmental conditions. such reactionary changes are distinct from seasonal, often anticipatory morphological changes, such as the reversible size change of some adult bird brains [2]. a unique pattern of profound anatomical change known as dehnel's phenomenon has been described for the body, skull and brain siz ... | 2017 | 29065289 |
| chromosome synapsis and recombination in male hybrids between two chromosome races of the common shrew (sorex araneus l., soricidae, eulipotyphla). | hybrid zones between chromosome races of the common shrew (sorex araneus) provide exceptional models to study the potential role of chromosome rearrangements in the initial steps of speciation. the novosibirsk and tomsk races differ by a series of robertsonian fusions with monobrachial homology. they form a narrow hybrid zone and generate hybrids with both simple (chain of three chromosomes) and complex (chain of eight or nine) synaptic configurations. using immunolocalisation of the meiotic pro ... | 2017 | 29053571 |
| study of male-mediated gene flow across a hybrid zone in the common shrew (sorex araneus) using y chromosome. | despite many studies, the impact of chromosome rearrangements on gene flow between chromosome races of the common shrew (sorex araneuslinnaeus, 1758) remains unclear. interracial hybrids form meiotic chromosome complexes that are associated with reduced fertility. nevertheless comprehensive investigations of autosomal and mitochondrial markers revealed weak or no barrier to gene flow between chromosomally divergent populations. in a narrow zone of contact between the novosibirsk and tomsk races ... | 2017 | 28919973 |
| karyotypic differentiation of populations of the common shrewsorex araneusl. (mammalia) in belarus. | the common shrews,sorex araneuslinnaeus, 1758, inhabiting the territory of belarus, are characterized by a significant variation in the frequency of robertsonian (rb) translocations. the frequency clines for translocations specific of three chromosome races: the west dvina (gm,hk,ip,no, qr), kiev (g/m,hi,k/o,n,p,q,r), and białowieża (g/r,hn,ik,m/p,o,q) have already been studied in this territory. in this communication we report new data on polymorphic populations with rb metacentrics specific of ... | 2017 | 28919969 |
| evolutionary history and phylogeographic relationships of shrews from sorex araneus group. | shrews of the sorex genus are an evolutionarily successful group that includes more than 77 species widely distributed in eurasia and north america. the genus is one of the rare cases where karyotypic changes reflect well the evolutionary relationships among its species. the taxa showing the greatest variation in karyotype are usually classified into the sorex araneus group. its evolution was associated with chromosomal rearrangements, which could have promoted fast diversification of this group ... | 2017 | 28650986 |
| stable carbon isotopes in breath reveal fast metabolic incorporation rates and seasonally variable but rapid fat turnover in the common shrew (sorex araneus). | small non-migratory mammals with northern distribution ranges apply a variety of behavioural and physiological wintering strategies. a rare energy-saving strategy is dehnel's phenomenon, involving a reduction and later regrowth of the body size, several organs and parts of the skeleton in red-toothed shrews (soricidae). the size extremes coincide with major life stages. however, the physiological consequences for the shrew's metabolism remain poorly understood. in keeping with the energetic limi ... | 2017 | 28546508 |
| western siberia rivers and the boundaries between chromosomal races of the common shrew (sorex araneus l. lipotyphla, mammalia). | in western siberia, most boundaries between common shrew chromosomal races have been found to pass along the banks of rivers, mainly those flowing in the meridional direction. the races serov and novosibirsk co-inhabited the right bank of the irtysh. the easternmost point of the novosibirsk race has been found on the middle yenisei river, while the race tomsk in this area was only on the right (eastern) bank. | 2016 | 28058602 |
| the complete mitochondrial genome of the sorex araneus. | the sorex araneus (common shrew), a member of the soricidae family, is the most common shrew throughout northern europe. the region includes great britain, but excludes ireland. herein, we first publish the complete mitochondrial genome of s. araneus. the mitogenome is 16 887 bp in length, which contains 24 trna genes, 13 protein-coding genes, 2 rrna genes and a control region. the overall gc content is 38.28%, which is lower than at. to verify the accuracy and utility of new determined mitogeno ... | 2016 | 26328473 |
| [genetic structure of the common shrew sorex araneus l. 1758 (mammalia, lipotyphla) in continuous and fragmented areas]. | in this work the genetic variability of the common shrew populations sorex araneus l. in eastern europe was studied via sequencing of the mitochondrial gene cyt b. a total of 82 sequences of the mitochondrial gene cyt b with a length of 953 basepairs were analyzed, including five chromosome races in a continuous area of the species in forest zone and two races in fragmented area in the steppe zone. phylogeographic subdivision of the common shrew was not expressed, and there was no significant co ... | 2015 | 26310034 |
| stammerinema hyalinum n. comb. for filaria hyalina von linstow, 1890 and its recognition as a senior synonym of stammerinema rhopalocephalum (sołtys, 1952) (spirurida: acuariidae), a parasite of shrews. | based on a re-examination of type-specimens of filaria hyalina von linstow, 1890 from sorex araneus l. (mammalia: soricidae) and morphological studies (light and scanning electron microscopy) of specimens collected from the same host species in bulgaria and previously identified as stammerinema rhopalocephalum (sołtys, 1952), both these forms are considered to be conspecific. accordingly, f. hyalina is transferred to the genus stammerinema osche, 1955 as stammerinema hyalinum n. comb. and the sp ... | 2015 | 25557751 |
| redescription and systematic position of soricinia tripartita zarnowski, 1955 (cestoda: cyclophyllidea), a cestode species parasitic in shrews of the genus sorex, including erection of gulyaevilepis gen. n. | soricinia tripartita zarnowski, 1955 is redescribed on the basis of specimens from the type host sorex araneus linnaeus from lithuania, latvia and russia (republic of karelia and republic of komi - a new geographical record) as well as from sorex satunini ognev and sorex volnuchini ognev from russia (nalchik area in the caucasus mountains). the strobilar morphology of s. tripartita is compared with that of other hymenolepidid cestodes of shrews with an unarmed scolex and serial development of pr ... | 2014 | 24822320 |
| [significance of the smell of a conspecific for the spatial distribution of the common shrew sorex araneus l]. | the significance of smell marks of conspecifics for the spatial distribution of common shrews was studied. the existence of two groups of individuals, which differ in their reaction to the smell of a conspecific, was shown. individuals with different reactions were shown to have reliable differences in the sizes of the areas visited by them, the mutual location of their plots, and the percent of activity combined with the activity of the neighbor. the significance of such differences in reaction ... | 2016 | 24171318 |
| assortative mating in the hybrid zones of the common shrew (sorex araneus mammalia) chromosome race west dvina. | | 2017 | 23975460 |
| cytogenetic analysis of a hybrid zone between the moscow and neroosa races of the common shrew (sorex araneus) differing by a single wart-like chromosome rearrangement. | three karyotypic variants were revealed in the moscow-neroosa chromosomal hybrid zone by comparative cytogenetic analysis: homozygotes of the pure parental races and complex heterozygotes (f1 hybrids). as expected, a ring-of-four configuration (riv) was observed in diakinesis spreads of hybrids. no disturbances in the structure of the riv were found. distribution of telomeric repeats and rdna on the chromosomes of an individual of the neroosa race were studied using dual-colour fish. | 2013 | 23875464 |
| phenotypic variation across chromosomal hybrid zones of the common shrew (sorex araneus) indicates reduced gene flow. | sorex araneus, the common shrew, is a species with more than 70 karyotypic races, many of which form parapatric hybrid zones, making it a model for studying chromosomal speciation. hybrids between races have reduced fitness, but microsatellite markers have demonstrated considerable gene flow between them, calling into question whether the chromosomal barriers actually do contribute to genetic divergence. we studied phenotypic clines across two hybrid zones with especially complex heterozygotes. ... | 2013 | 23874420 |
| [craniometric differences between karyotypic races of the common shrew sorex araneus (mammalia) as a result of limited hybridization]. | the contact points of four karyotypic races (st. petersburg, moscow, seliger and west dvina) of the common shrew sorex araneus l. were studied at the valdai hills (european russia) in an area unimpeded by geographic barriers. the populations of the races are separated by narrow hybrid zones that represent the most complex heterozygous hybrid karyotypes. at these points of contact, the morphometric differentiation of karyotype races was examined in 12 cranial measurements in 190 shrews of a known ... | 2013 | 23866625 |
| effects of late quaternary climate change on palearctic shrews. | the late quaternary was a time of rapid climatic oscillations and drastic environmental changes. in general, species can respond to such changes by behavioral accommodation, distributional shifts, ecophenotypic modifications (nongenetic), evolution (genetic) or ultimately face local extinction. how those responses manifested in the past is essential for properly predicting future ones especially as the current warm phase is further intensified by rising levels of atmospheric carbon dioxide. here ... | 2013 | 23505017 |
| winter reduction in body mass in a very small, nonhibernating mammal: consequences for heat loss and metabolic rates. | low temperatures in northern winters are energetically challenging for mammals, and a special energetic burden is expected for diminutive species like shrews, which are among the smallest of mammals. surprisingly, shrews shrink their body size in winter and reduce body and brain mass, an effect known as dehnel's phenomenon, which is suggested to lower absolute energy intake requirements and thereby enhance survival when food availability is low. yet reduced body size coupled with higher body-sur ... | 2013 | 23303317 |
| importance of olfactory communication in the spiral search strategy of the common shrew sorex araneus l. | | 2017 | 23292472 |
| the genetic structure of an isolated population of the common shrew sorex araneus l. (mammalia) as determined from microsatellite variation. | | 2017 | 23129278 |
| [behavioral interactions of adult females of the common shrew (sorex araneus) with conspecifics on familiar territory]. | interactions of overwintered females with conspecifics (> or = 5 days) on familiar territories were studied experimentally. in interactions of the resident females with unfamiliar overwintered females (28 experiments), there were no differences related to the reproductive status of both parties. between the behavior of the residents and aliens, there were no significant differences, except the refusals of contacts--and aliens had more of it. identification and affiliative behavior and the presen ... | 2016 | 22988759 |
| estimating population-level coancestry coefficients by an admixture f model. | in this article, we develop an admixture f model (afm) for the estimation of population-level coancestry coefficients from neutral molecular markers. in contrast to the previously published f model, the afm enables disentangling small population size and lack of migration as causes of genetic differentiation behind a given level of f(st). we develop a bayesian estimation scheme for fitting the afm to multiallelic data acquired from a number of local populations. we demonstrate the performance of ... | 2012 | 22798486 |
| [narrow hybrid zone between moscow and western dvina chromosomal races and specific features of population isolation in common shrew sorex araneus (mammalia)]. | the contact zone between moscow and western dvina chromosomal races of common shrew sorex araneus l. at the south of the valdai hights was traced over a distance of 20 km. within this, close to parapatric, contact zone of chromosomal races the width of sympatry zone was about 500 m (the narrowest among currently known hybrid zones), and the proportion of hybrids was 24.3%. it was shown that in bimodal hybrid zones between chromosomal races of common shrew the width of sympatry zones varied from ... | 2012 | 22567857 |
| chromosomal rearrangements do not seem to affect the gene flow in hybrid zones between karyotypic races of the common shrew (sorex araneus). | chromosomal rearrangements are proposed to promote genetic differentiation between chromosomally differentiated taxa and therefore promote speciation. due to their remarkable karyotypic polymorphism, the shrews of the sorex araneus group were used to investigate the impact of chromosomal rearrangements on gene flow. five intraspecific chromosomal hybrid zones characterized by different levels of karyotypic complexity were studied using 16 microsatellites markers. we observed low levels of geneti ... | 2012 | 22380446 |
| synaptonemal complex analysis of interracial hybrids between the moscow and neroosa chromosomal races of the common shrew sorex araneus showing regular formation of a complex meiotic configuration (ring-of-four). | immunocytochemical and electron microscopic analysis of synaptonemal complexes (scs) was carried out for the first time in homozygotes and complex robertsonian heterozygotes (hybrids) of the common shrew, sorex araneus linnaeus, 1758, from a newly discovered hybrid zone between the moscow and the neroosa chromosomal races. these races differ in four monobrachial homologous metacentrics, and closed sc tetravalent is expected to be formed in meiosis of a hybrid. indeed, such a multivalent was foun ... | 2012 | 24260670 |
| a comparison of the chromosome g-banding pattern in two sorex species, s. satunini and s. araneus (mammalia, insectivora). | the g-banded karyotype of sorex satunini was compared with the karyotype of sorex araneus. extensive homology was revealed. the major chromosomal rearrangements involved in the evolutionary divergence of these species have been identified as centric fusions and centromeric shifts. from the known palaeontological age of sorex satunini it is obvious that the vast chromosomal polymorphism of the sorex araneus group originated during the middle pleistocene. | 2012 | 24260667 |
| do aquatic barriers reduce male-mediated gene flow in a hybrid zone of the common shrew (sorex araneus)? | | 2011 | 22150822 |
| [the microsatellite polymorphism and gene flow in the contact zone of four common shrew (sorex araneus l., mammalia) chromosome races]. | the variation of microsatellite loci in 130 individuals of four common shrew chromosome races (moscow, western dvina, seliger, and st. petersburg) contacting on the valdai hills was studied. a low level of genetic differences between the chromosome races, which differ at three-five fixed diagnostic metacentric chromosomes, was found. the genetic differentiation within the races is more considerable as compared with that between the races. a high deficiency in heterozygotes was recorded; presumab ... | 2016 | 22117416 |
| [phylogenetic relationships of caucasian shrew sorex satunini ogn. (mammalia) in the superspecies sorex araneus inferred from the data of karyological analysis and the mtdna cyt b gene sequencing]. | using the data of karyological analysis, the phylogenetic relationships of caucasian shrew sorex satunini and the cryptic species of superspecies sorer araneus were examined. in the population of sorex satunini from the plain of north ciscaucasia two deeply radiated cytochrome b genes (a and b) were identified. genetic distance between haplotype a and b groups constituted 0.0675 +/- 0.008, which is higher than any distance in superspecies s. araneus. possible introgression of type b haplotypes f ... | 2011 | 21866861 |
| [variability of a cytochrome b region in different chromosome races and populations of the common shrew sorex araneus l., 1758]. | the nucleotide sequence (572 bp) of the cytochrome b gene of the common shrew sorex araneus was analyzed. in total, 92 animals of five chromosome races from 12 localities were studied. the median haplotype network has a pronounced star-like structure. the central haplotype common for all samples, except for the southern island sample of the race sok, accounts for about 36%. the main characteristics of molecular variation in our work correspond to those obtained in other studies. we revealed the ... | 2011 | 21675242 |
| natural hybridization between extremely divergent chromosomal races of the common shrew (sorex araneus, soricidae, soricomorpha): hybrid zone in siberia. | chromosomal races of the common shrew differ in sets of metacentric chromosomes and on contact may produce hybrids with extraordinarily complex configurations at meiosis i that are associated with reduced fertility. there is an expectation that these may be some of the most extreme tension zones available for study and therefore are of interest as potential sites for reproductive isolation. here, we analyse one of these zones, between the novosibirsk race (characterized by metacentrics go, hn, i ... | 2011 | 21507114 |
| a microsatellite study in the łęgucki młyn/popielno hybrid zone reveals no genetic differentiation between two chromosome races of the common shrew (sorex araneus). | this study investigated a chromosome hybrid zone between two chromosomal races of the common shrew (sorex araneus). gene flow and genetic structure of the hybrid zone, located in the northeast of poland, were studied using seven polymorphic autosomal microsatellite loci (l9, l14, l33, l45, l67, l68, l97) and a y-linked microsatellite locus (l8y). seventy-five animals (46 of the łęgucki młyn race and 29 of the popielno race) from nine different localities were examined and the data were analyzed ... | 2011 | 21475705 |
| [racial and population variability of phenotypic (cranial) characters in the common shrew sorex araneus l., 1758]. | variability of the cranial properties of chromosomal races serov, manturovo and pechora of the common shrew were studied. a consistent increase of scull size in the serov race with moving from the plain to highlands and a skull size decrease from low to high latitudes was detected. interpopulation variability among different races was shown to be comparable with interracial variability or to exceed it. this suggests microevolution at the level of local populations. | 2011 | 21446185 |
| [two types of territory used by the common shrew sorex araneus l]. | the home range of resident animals is considered as "known territory" including a "foraging region." it has been revealed that the activity of an average animal unit in the "foraging region" could be approximated by normal distribution. estimation of activity distribution in the "known territory" (beyond the "foraging region") was impeded by means of marking since it might be difficult to detect the frequency of distant translocations, and the method does not provide an essential body of data. i ... | 2016 | 21442913 |
| isolation effect in narrow hybrid zones of sorex araneus chromosome races. | | 2017 | 21369902 |
| [identification of a novel wart-like chromosome rearrangement in complex heterozygotes in an interracial hybrid zone of the common shrew sorex araneus l]. | karyotypes uncharacteristic of pure races or hybrids were identified in the interracial hybrid zones of the common shrew sorex araneus l. that were recently discovered in the european part of russia. this suggests the actual existence in natural populations of wart-like rearrangements (whole-arm reciprocal translocations) along with robertsonian fusions of acrocentrics. demonstration of new and still rare chromosome variants is the aim of this communication. | 2010 | 21061632 |
| additional data for nuclear dna give new insights into the phylogenetic position of sorex granarius within the sorex araneus group. | many species contain genetic lineages that are phylogenetically intermixed with those of other species. in the sorex araneus group, previous results based on mtdna and y chromosome sequence data showed an incongruent position of sorex granarius within this group. in this study, we explored the relationship between species within the s. araneus group, aiming to resolve the particular position of s. granarius. in this context, we sequenced a total of 2447 base pairs (bp) of x-linked and nuclear ge ... | 2010 | 20883802 |
| population models in pesticide risk assessment: lessons for assessing population-level effects, recovery, and alternative exposure scenarios from modeling a small mammal. | in the last few years, the interest in using ecological population models as a tool for pesticide risk assessment has increased rapidly. practical guidance, however, on how to perform a risk assessment with a population model is still lacking. it is still unclear which endpoint (population density, population growth, etc.) is the most sensitive indicator of population-level effects and how risk can be evaluated at the population level. moreover, a main added value of model-based risk assessments ... | 2010 | 20821572 |
| frequency of meiotic recombination in g and r chromosome bands of the common shrew (sorex araneus). | | 2017 | 20711874 |
| hybrid origin of karyotypic variation in the common shrew, sorex araneus (mammalia), from the dnieper river basin. | | 2017 | 20170065 |
| [telomeric dna allocation in chromosomes of common shrew sorex araneus, eulipotyphla]. | recently we have displayed shrew species, iberian shrew s. granarius, with telomeres of unusual for mammals structure, including long telomeres on the short acrocentrics arms containing 213 kb on average and short telomeres (3.8 kb) on the other chromosomal ends (zhdanova et al., 2005, 2007). however, it is not clear if such telomeres are characteristic of all shrew species or only of s. granarius. s. granarius and common shrew sorex araneus are the sibling species. in this investigation by usin ... | 2009 | 19764649 |
| ecomorphometric variation and sexual dimorphism in the common shrew (sorex araneus). | we investigated the evolution of the biomechanics of the mandible in island and mainland populations of the common shrew on the west coast of scotland. we predicted that climatic differences between populations should cause differences in prey composition leading to changes in the mechanical potential (mp) of the mandible. in females, mp was correlated with climate, with greater mp in warmer and drier habitats. in males, mp was significantly greater than in females but there was no relationship ... | 2009 | 19389155 |
| livestock grazing intensity affects abundance of common shrews (sorex araneus) in two meadows in denmark. | current nature conservation in semi-natural grasslands often includes grazing and hay cutting, as well as the abandonment of draining. semi-natural grassland and in particular meadows constitute important habitat type for a large number of animal species in today's fragmented and intensively cultivated landscape of europe. here we focus on the population characteristics of common shrews sorex araneus in relation to livestock grazing intensity in two wet meadows in western denmark. | 2009 | 19152713 |
| sex chromosome meiotic drive in hybrid males of the common shrew (sorex araneus). | patterns of sex chromosome segregation in six homozygous males of the common shrew (sorex araneus linnaeus, 1758) belonging to two chromosomal races, as well as in 16 interracial hybrids were studied. based on their karyotypes the hybrids can be subdivided into two groups: (a) complex heterozygotes, which form meiotic quadrivalents in chain and chain + ring configurations, and (b) complex heterozygotes, which form meiotic pentavalents in chain configurations. random (1:1) segregation of sex chro ... | 2005 | 19058534 |
| robertsonian polymorphism in the common shrew (sorex araneus l.) and selective advantage of heterozygotes indicated by their higher maximum metabolic rates. | some cases of robertsonian (rb) polymorphism in the common shrew (sorex araneus l.) are believed not to be associated with hybrid zones. one of the hypotheses explaining the persistence of such rb polymorphism is that they are maintained by some form of selection for rb heterozygotes. to test this hypothesis, we compared several parameters between homozygotes and rb heterozygotes for the mp chromosome pair. we used shrews from jurowce population in poland, situated within the range of the białow ... | 2009 | 18827836 |
| [distribution of two chromosome races of the common shrew (sorex araneus l.) in the hybrid zone: may a change of the dispersal mode maintain independent gene frequencies?]. | combination of different dispersal modes may itself, without external obstacles, lead to the appearance of subdivided populations and maintain the existence of independent population systems. the common shrew, a mammal convenient for studying different levels of intraspecific differentiation, was the object of the study. empirical data have been used for simulation taking into account the change of dispersal modes in the population area. the obtained results agree with empirical data on the dist ... | 2008 | 18727383 |
| [3d organization of interphase fibroblast nuclei in two closely related shrew species, sorex granarius and s. araneus, differed by the structure of chromosome termini]. | to study 3d organization of fibroblast interphase nuclei in two sibling shrew species, sorex araneus from cordon race and s. granarius, fish with probe to telomeric and rdna repeats, and immunofluorescence with ana crest and antibodies to nucleolus protein b23 were used. karyotypes of studied species are composed of near identical chromosomal arms and differ by the number of metacentrics and the structure of terminal chromosome regions. the large telomeres containing on the average 218 kbp of te ... | 2008 | 18683589 |
| [fixation of metacentric chromosomes in populations of the common shrew sorex araneus l. from populations of eastern europe]. | in this review, we discuss the processes of fixation of robertsonian chromosome fusions in populations of the common shrew sorex araneus l. various robertsonian fusions, accumulating in populations, create an illusion of large chromosomal rearrangements, reciprocal translocations of complete chromosome arms. the use of these rearrangements for phylogenetic reconstructions results in false conclusions. robertsonian fusions accumulate in populations at such stages of the species evolution, when la ... | 2008 | 18672791 |
| [cytogenetic control of a hybrid zone of between two sorex araneus chromosome races before breeding season]. | two chromosome races of common shrew, moscow and seliger, differ in the arm combination in 11 diagnostic chromosomes (robertsonian metacentrics/acrocentrics). homozygotes of both pure races, simple robertsonian heterozygotes of seliger race, and complex heterozygotes (fi hybrids) were detected in the found earlier between hybrid zone of these races, in the spring before the breeding seasonbreeding season. the g/oheterozygote was first discovered in race seliger, whose chromosome formula typicall ... | 2007 | 18592688 |
| generation recruitment and death of brain cells throughout the life cycle of sorex shrews (lipotyphla). | young shrews of the genus sorex that are born in early summer reduce their body size before wintering, including a reduction of brain weight of 10-30%. in the spring they mature sexually, double their body weight and regain about half of the loss in brain weight. to investigate the mechanisms of brain weight oscillations we studied the rate of cell death and generation in the brain during the whole life cycle of the common shrew (sorex araneus) and pygmy shrew (s. minutus). after weaning, shrews ... | 2008 | 18380668 |
| a new perspective on the evolutionary history of western european sorex araneus group revealed by paternal and maternal molecular markers. | the species of the common shrew (sorex araneus) group are morphologically very similar, but have undergone a spectacular chromosomal evolution. we investigate here the evolutionary history of the sorex araneus group distributed in western europe. in particular, we clarify the position of a difficult species, s. granarius, using sex-specific (mtdna and y-chromosome) markers. the karyotype of s. granarius is generally considered similar to the common ancestor of the restricted group considered her ... | 2008 | 18325791 |
| chromosomal rearrangements and genetic structure at different evolutionary levels of the sorex araneus group. | robertsonian (rb) fusions received large theoretical support for their role in speciation, but empirical evidence is often lacking. here, we address the role of rb rearrangements on the genetic differentiation of the karyotypically diversified group of shrews, sorex araneus. we compared genetic structure between 'rearranged' and 'common' chromosomes in pairwise comparisons of five karyotypic taxa of the group. considering all possible comparisons, we found a significantly greater differentiation ... | 2008 | 18266682 |
| mandible asymmetry and genetic diversity in island populations of the common shrew, sorex araneus. | mandibles from 13 island and six mainland populations of common shrews from the west coast of scotland were subjected to geometric morphometric analysis in order to investigate the relationship between genetic diversity and fluctuating asymmetry. although population mean shape fluctuating asymmetry (fa) and size fa were significantly inversely correlated with population genetic diversity this result was substantially due to one island. sanda, the smallest island with by far the lowest genetic di ... | 2008 | 18194233 |
| endemic chromosome races of the common shrew sorex araneus l. (insectivora, mammalia) and the possible preservation of refugia in the late valdai glaciation area. | | 2017 | 18047030 |
| the very long telomeres in sorex granarius (soricidae, eulipothyphla) contain ribosomal dna. | two closely related shrew species, sorex granarius and sorex araneus, in which robertsonian rearrangements have played a primary role in karyotype evolution, present very distinct telomere length patterns. s. granarius displays hyperlong telomeres specifically associated with the short arms of acrocentrics, whereas telomere lengths in s. araneus are rather short and homogenous. using a combined approach of chromosome and fibre fish, modified q-fish, 3d-fish, ag-nor staining and trf analysis, we ... | 2007 | 17899406 |
| [helminth fauna in insectivores (mammalia: insectivora) of canal banks in meliorated territories]. | helminth fauna of insectivora was investigated in canal banks situated in meliorated territories of belorussian polesie during 1996-1999. thirty-three helminth species were found in the animals examined. most of the parasites are usual in common shrew sorex araneus l., which is a predominate insectivore species in canal banks. | 2010 | 17722640 |
| preferential segregation of metacentric chromosomes in simple robertsonian heterozygotes of sorex araneus. | one of the hypotheses explaining preferential transmission of metacentrics among simple robertsonian (rb) heterozygotes of the common shrew (sorex araneus l.) invokes the existence of meiotic drive. thus far, evidence that metacentrics are favoured at meiosis has been obtained indirectly, on the basis of crosses made under controlled conditions. the aim of the present work was to test the hypothesis in a direct study. we analysed products of chromosome segregation among 12 simple heterozygote ma ... | 2007 | 17700635 |
| cases of coat colour anomalies in the common shrew, sorex araneus l. | coat colour anomalies in the common shrew, sorex araneus l., in the geographical range of this species, including poland, are extremely rare. this study describes atypically coloured common shrews. light colouration of the coat is a result of lack ofpigment in the entire hair or hair fragments. it appears that atypically coloured shrews occur more often in isolated populations whose gene transfer with neighboring populations is limited. | 2007 | 17687937 |
| using a bayesian method to assign individuals to karyotypic taxa in shrew hybrid zones. | individuals sampled in hybrid zones are usually analysed according to their sampling locality, morphology, behaviour or karyotype. but the increasing availability of genetic information more and more favours its use for individual sorting purposes and numerous assignment methods based on the genetic composition of individuals have been developed. the shrews of the sorex araneus group offer good opportunities to test the genetic assignment on individuals identified by their karyotype. here we exp ... | 2007 | 17431326 |
| restricted gene flow at specific parts of the shrew genome in chromosomal hybrid zones. | the species and races of the shrews of the sorex araneus group exhibit a broad range of chromosomal polymorphisms. european taxa of this group are parapatric and form contact or hybrid zones that span an extraordinary variety of situations, ranging from absolute genetic isolation to almost free gene flow. this variety seems to depend for a large part on the chromosome composition of populations, which are primarily differentiated by various robertsonian fusions of a subset of acrocentric chromos ... | 2006 | 17017071 |
| [molecular variability in the commom shrew sorex araneus l. from european russia and siberia inferred from the length polymorphism of dna regions flanked by short interspersed elements (inter-sine pcr) and the relationships between the moscow and seliger chromosome races]. | genetic exchange among chromosomal races of the common shrew sorex araneus and the problem of reproductive barriers have been extensively studied by means of such molecular markers as mtdna, microsatellites, and allozymes. in the present study, the interpopulation and interracial polymorphism in the common shrew was derived, using fingerprints generated by amplified dna regions flanked by short interspersed repeats (sines)-intersine pcr (is-pcr). we used primers, complementary to consensus seque ... | 2006 | 16871777 |
| chromosome localization of microsatellite markers in the shrews of the sorex araneus group. | the extremely high rate of karyotypic evolution that characterizes the shrews of the sorex araneus group makes this group an exceptionally interesting model for population genetics and evolutionary studies. here, we attempted to map 46 microsatellite markers at the chromosome arm level using flow-sorted chromosomes from three karyotypically different taxa of the sorex araneus group (s. granarius and the chromosome races cordon and novosibirsk of s. araneus). the most likely localizations were pr ... | 2006 | 16628496 |
| unusual distribution pattern of telomeric repeats in the shrews sorex araneus and sorex granarius. | sorex araneus and sorex granarius are sibling species within the sorex araneus group with karyotypes composed of almost identical chromosome arms. s. granarius has a largely acrocentric karyotype, while, in s. araneus, various of these acrocentrics have combined together by robertsonian (rb) fusions to form metacentrics, with the numbers and types of metacentrics differing between chromosomal races. our studies on telomeric sequences in s. araneus and s. granarius revealed differences between ch ... | 2005 | 16170626 |
| scanning electron microscopy of lingual papillae in the common shrew, sorex araneus, l. | the dorsal surface of the tongue of the adult common shrew (sorex araneus l.) was examined by scanning electron microscopy. as in the other insectivores, three types of lingual papillae were observed: filiform, fungiform and vallate papillae. the filiform papillae represented the most numerous type of lingual papillae. the characteristic feature of the filiform papillae, covering the apex and corpus of the tongue, is the two processes tilted to the root of the tongue. the filiform papillae on th ... | 2004 | 15352882 |
| [density-dependent behavior of the shrews (sorex araneus, s. caecutiens, and s.minutus) in natural and experimental conditions]. | the behavior of three common shrew species was compared in a test of pairwise placement in a neutral territory (10 min) for various population densities in natural habitats and for animals kept isolated or in groups in open-air cage conditions. the behavior of the animals captured in nature was considered as the norm. we considered total number of social contacts (as an index of social activity), as well as the proportions of direct and ritualized aggressive interactions, contact avoidances, and ... | 2016 | 14994473 |
| giant mitochondria in the retina cone inner segments of shrews of genus sorex (insectivora, soricidae). | the retinas of three species of shrews (sorex araneus, s. coronatus, and s. minutus) were analyzed. two kinds of photoreceptors were identified according to (among other characteristics) the traits of the mitochondria of their inner segments. the rod inner segments contained several round or oval mitochondria distributed longitudinally inside the ellipsoid. the cone inner segment showed a few mitochondria, which we classified as megamitochondria (maximum length = 4.22 microm in s. araneus, 5.68 ... | 2003 | 12740941 |
| meiotic studies of male common shrews (sorex araneus l.) from a hybrid zone between chromosome races. | thirty-three adult male common shrews (sorex araneus l.) were collected from a hybrid zone between two chromosomal races that differed in robertsonian metacentrics. anaphase i nondisjunction frequencies were estimated on the basis of metaphase ii counts. riv and cv complex heterozygotes (four-element rings and five-element chains at meiosis i, respectively) had substantially higher nondisjunction rates than homozygotes and simple robertsonian heterozygotes. however, at least in the case of riv-f ... | 2002 | 12438778 |
| [intraspecies phylogenetic connections in sorex araneus l.: a southern baltic subgroup of chromosome races]. | results of chromosome g-banding were used to identify two new karyotypic races of the common shrew (sorex araneus l.) in the european part of russia. the chromosomal diagnosis of race st. petersburg included five metacentrics (hk, ip, jl, mq, and nr) and two acrocentrics (g and o) (2na = 20); the diagnosis of race west dvina included six metacentrics (gm, hk, ip, jl, no, and qr) (2na = 18). the phylogenetic significance of the chromosomal markers gm, hk, and ip is considered and the possibility ... | 2002 | 11852798 |
| on morphological clocks and paleophylogeography: towards a timescale for sorex hybrid zones. | phylogeography--the study of within-species phylogenetic and geographic divergence--has been primarily the domain of molecular evolutionists because molecular markers record population structure on smaller scales than do traditional morphological traits. but when geometric morphometrics are combined with distance-based phylogenetics molar shape divergence appears to record population-level phylogeny, a fact that allows extant and fossil populations to be combined in a single phylogeographic stud ... | 2001 | 11838775 |
| helminth fauna of the common shrew (sorex araneus linnaeus, 1758) in ecosystems of belorussian polesie transformed by reclamation. | | 2001 | 11570570 |