| postoncospheral development and cycle of taenia polyacantha leuckart, 1856 (cestoda: taeniidae). first part. | the postoncospheral development and cycle of taenia polyacantha leuckart, 1856, an holarctic species of cestode, were investigated in the laboratory as well as in the tundra of northern alaska. foxes, alopex lapogus (l.) and vulpes vulpes (l.), serve as final host of t. polyacantha; the northern vole, microtus oeconomus (pallas), and the brown lemming, lemmus sibiricus (kerr), are important as the intermediate host. as determined in experimentally infected voles and lemmings, the oncosphere of t ... | 1988 | 3059953 |
| leptospira interrogans in the ballum serogroup from a vole, microtus oeconomus (pallas) in alaska. | | 1974 | 4436918 |
| hepatozoon sp. in northern voles, microtus oeconomus, on st. lawrence island, alaska. | | 1971 | 5167766 |
| [faunal notes on anoplura in microtus oeconomus (pallas)]. | | 1970 | 5529987 |
| notes on pasteurella tularensis isolated from a vole, microtus oeconomus pallas, in alaska. | | 1969 | 5765177 |
| [occurrence of natural tularemia foci in kamchatka]. | the focus of tularemia in the ust-kamchatsky region belongs probably to the flood-plain and swamp type with muskrats and tundra voles being the main carriers. in autumn 1980 for the first time three cultures were isolated in this region: 1 from a tundra vole and 2 from muskrats. the presence of antibodies to tularemia antigen in norway rats was revealed in the passive hemagglutination test. | 1983 | 6353814 |
| [population ecology of leptospires. 1. an experience with evaluation of leptospira count in a carrier and the intensity of elimination in the urine]. | the number of l. hebdomadis and l. grippotyphosa in the body of tundra voles (microtus oeconomicus) has been shown to be approximately 500-800 million; about 100 million of them are daily eliminated from the body of a vole with urine. about 70% of the total volume and separate portions of urine contain leptospires, a single portion of urine containing about 2 million microbial cells. these data have proved to be the same for both l. hebdomadis and l. grippotyphosa. | 1983 | 6613420 |
| [analysis of the antigeno-immunologic activity of heated leptospirosis vaccine in vaccinees and in an experimental study]. | the comparative analysis of the immunological effectiveness of heat-killed polyvalent leptospirosis vaccine has shown the low immunological effectiveness of the whole preparation (17.8%) and its components with the exception of the antigen of the grippotyphosa serogroup. antibodies could be detected in the vaccinees for not more than 10 months, and they showed the properties of 19s-macroglobulin antibodies. in experiments on rabbits newly isolated leptospira strains from human patients and wild ... | 1980 | 6998213 |
| [strain properties of the aina/1448 serotype of the tick-borne encephalitis virus]. | four strains of tick-borne encephalitis (tbe) virus isolated in the irkutsk region were shown by the agar gel diffusion and precipitation test with adsorbed sera to comprise a single antigenic group differing from members of the eastern and western tbe virus serotypes (sophyin and 256 strains). the group includes the strains isolated during 20 years (1960 - 1980) from patients with chronic tbe form (aina/1448 and 763 strains), from the brain of root vole (microtus oeconomus pall) (strain 147), a ... | 1981 | 7336697 |
| phylogenetic relationships within taenia taeniaeformis variants and other taeniid cestodes inferred from the nucleotide sequence of the cytochrome c oxidase subunit i gene. | nucleotide sequence variations in a region of the mitochondrial cytochrome c oxidase subunit i (coi) gene (391 bp) were examined within seven species of the genus taenia and two species of the genus echinococcus, including ten isolates of t. taeniaeformis and six isolates of e. multilocularis. more than a 12% rate of nucleotide differences between taeniid species was found, allowing the species to be distinguished. in e. multilocularis, no sequence variation was observed among isolates, regardle ... | 1995 | 7567901 |
| prevalence of cryptosporidium sp. in peak density microtus agrestis, microtus oeconomus and clethrionomys glareolus populations. | the prevalence of cryptosporidia was determined in high density populations of microtus agrestis, microtus oeconomus, and clethrionomys glareolus in finland. one of 131 m. agrestis and one of 41 c. glareolus each were found to be infected with cryptosporidium sp.; none were found in 43 microtus oeconomus. these apparently healthy voles had neither signs of clinical disease nor histopathological changes in intestines. | 1994 | 8151812 |
| [influence of radioactive pollution on the character of the distribution of wild mouselike rodents according to the measure of lipid antioxidant activity in their organs]. | the estimation of the degree of the radioactive contamination effect on the antioxidative status in tissues of rodents from natural populations is done by means of biometric methods. it is shown, that the character of distribution and variability of the lipids antioxidant activity (aoa) differs significantly depending of species and age of animals, the degree of contamination on areas where wild rodents were caught and time during which the radioactive factor affected. the change in character of ... | 1998 | 9889789 |
| small mammals as reservoir hosts for borrelia in russia. | in 1992-1993, a total of 29 isolates of borrelia were obtained from small mammals captured in taiga forests of the perm' region: 26 isolates were obtained from clethrionomus glareolus and one each from c. rufocanus, microtus oeconomus, and apodemus sylvaticus. isolation of borrelia was performed by plating the animal material on bsk-ii medium. most isolates (86.2%) were obtained from the urinary bladder, the rest from the heart and spleen. according to the results of ifa with a set of monoclonal ... | 1995 | 7549164 |
| [identification of structural rearrangements in the karyotype of microtus oeconomus from chernobyl by differential staining of chromosomes]. | karyological studies of rodents within a 30-km radius of the chernobyl' nuclear power plant revealed one female root vole (microtus oeconomus) with an abnormal karyotype. the use of c, g, and agnor banding methods allowed us to determine that morphological changes in two nonhomologous autosomes, which were accompanied by rearrangements in distribution of g bands, heterochromatin, and nor, are the result of a reciprocal translocation. chromosomal aberrations were probably inherited or appeared in ... | 1994 | 7514556 |
| further studies on effects of x-irradiation on prespermatid stages of the northern vole microtus oeconomus: low induction of sex-chromosomal nondisjunction and very high induction of diploid spermatids. | microtus males have been irradiated with x-ray doses of 25, 50, 100 and 200 rad and early spermatids were then analyzed for evidence of induction of sex-chromosomal nondisjunction and diploid spermatids at 1, 4, 6, 7, 9 and 12 days after treatment. in contrast to earlier findings, there was no induction of nondisjunction above control levels. a possible explanation for the differences in results of old and new experiments might be that genetic changes have taken place in the microtus colony that ... | 1981 | 7022180 |
| some corrections in haemogregarine (apicomplexa: protozoa) nomenclature. | the nomenclature of three genera in the family haemogregarinidae (haemogregarina, karyolysus, and hepatozoon) has been reviewed and the following new names are introduced to replace homonyms or for previously unnamed species: haemogregarina carlosi n. nom., in the erythrocytes of the lizard lacerta ocellata; haemogregarina tincae n. nom., in the stomach and intestine of the tench tinca tinca; hepatozoon insectivorae n. sp., in the leucocytes of the shrews sorex araneus and crocidura leucodon; he ... | 1982 | 6757414 |
| basic carriers of trichophyton mentagrophytes var. gypseum in the sverdlovsk region. | tests for myococarriers were made on 4.297 wild small mammals. clinical examinations only were carried out on 1,204 animals, both clinical and laboratory examinations on 3,093 animals. the suppurative form of trichophytosis was diagnosed in only one specimen of microtus oeconomus out of 1,204 animals examined. t. ectothrix microides was found in the hair taken from the focus. t. mentagrophytes var. gypseum was obtained by culture on nutrient media. no clinical signs of mycosis were found in 3,09 ... | 1987 | 3680938 |
| steroid sulphatase levels are higher in males than in females of the root vole (microtus oeconomus). yet another rodent with an active y-linked allele? | steroid sulfatase (sts; ec 3.1.6.2) levels were assayed in cultured fibroblasts of root voles captured in the wild. four independent experiments were performed using two different substrates (dheas and e1s). evidence is presented that in this species, sts levels are significantly higher in males than in females (ratio 1.6:1). we discuss our findings on a comparative basis and suggest that in the root vole the sts gene(s) is x- and y-linked (as in the mouse) and that it is subject to x-inactivati ... | 1987 | 3305308 |
| the root-vole microtus oeconomus (pallas, 1776): a new potential reservoir of anaplasma phagocytophilum. | anaplasma phagocytophilum infection is a recently emerged tick-borne zoonosis. the bacterium's reservoirs likely comprise cervids, some ruminants, rodents, and perhaps other small and intermediate-size mammals; the main vector in europe is the ixodes ricinus tick. the białowieza primeval forest is an ecosystem with a known prevalence of tick-borne pathogens. we studied the root-vole microtus oeconomus to evaluate the natural infection of a. phagocytophilum. intragranulocytic bacterial clusters ( ... | 2006 | 16989562 |
| [the functioning of a drained natural focus of leptospirosis in a nonchernozem area]. | the drainage of a natural focus of leptospirosis of the flood plain-swamp type, carried out over the period of 15 years, has led to changes in the species structure of small mammals and to an increase in the number of leptospira-carrying species. nevertheless, like before drainage, the prevalent species and the main carrier of leptospires is still the root vole (microtus oeconomus pallas). the intensity of the epizootic process among small mammals at the final stage of drainage has proved to be ... | 1988 | 2974674 |
| [isolation of poxvirus (poxviridae, orthopoxvirus, the cowpox complex) from the root vole microtus (m.) oeconomus pal. 1776 in the forest tundra of the kola peninsula]. | | 1988 | 2967016 |
| a programme to reduce the risk of infection by echinococcus multilocularis: the use of praziquantel to control the cestode in a village in the hyperendemic region of alaska. | this paper reports the results of a 10-year field trial designed to reduce the risk of infection by echinococcus multilocularis to residents of a village in a hyperendemic area (savoonga, st. lawrence island). the objective was to prevent dispersal of infective eggs of the cestode within the village by means of monthly treatments of dogs with praziquantel. northern voles, microtus oeconomus, present in the village as commensals, served as an index of risk, as the incidence of infection in the vo ... | 1990 | 2222026 |
| [the isolation of tick-borne encephalitis virus strains and the determination of the scope of immune stratification among the population and the domestic animals on the northern russian plain]. | between 1986 and 1987 the authors conducted virological survey of 689 ixodes persulcatus and 420 mouse-like and insectivorous rodents at the territory of arkhangelsk province and the republic of komi. a total of 8 strains of tick-borne encephalitis virus were isolated. out of them 3 strains were isolated from small mammalians (2 from clethrionomys glareolus, 1 from microtus oeconomus) at the southeastern areas of arkhangelsk province within the middle taiga subarea, 5 strains were isolated from ... | 1990 | 2145500 |
| [the reproductive potential of the bank vole (clethrionomys glareolus schreb) and of the tundra vole (microtus oeconomus pall.) under the conditions of the elevated radiation background of bryansk province]. | the continuous irradiation (connected with the accident on the chernobyl atomic power plant) by cesium-137 of the dominant species of rodents (clethrionomys glareolus, microtus oeconomus) in the forests of bryansk province had a deteriorating effect on the state of reproductive organs and on the course of embryogenesis, stimulated the reproduction cycle but inhibited the rate of sexual maturation and increased the death-rate of young animals. these effects resulted in significant ageing of the p ... | 1992 | 1302492 |
| [blood parasites of small wild mammals in czechoslovakia]. | the author investigated 4,853 specimens of wild living small mammals (43 species: insectivora, chiroptera, lagomorpha, rodentia, carnivora) from czechoslovakia for blood parasites. trypanosomes were found in talpa europaea, sorex alpinus, crocidura suaveolens, myotis myotis, apodemus sylvaticus, apodemus flavicollis, mus musculus, rattus norvegicus, clethrionomys glareolus and microtus agrestis. babesia was detected in myotis emarginatus, myotis myotis, clethrionomys glareolus, microtus arvalis ... | 1975 | 1158292 |
| the induction of sex-chromosomal nondisjunction and diploid spermatids following x-irradiation of pre-spermatid stages in the northern vole microtus oeconomus. | chromosome nondisjunction seems to be one of the most important mutagenic effects occurring in man and makes an enormous contribution to human foetal wastage. as yet, little or no information is available on which environmental factors are important in inducing nondisjunction and accordingly we have investigated the effect of x-irradiation on inducing nondisjunction in male germ cells of an experimental mammal, the northern vole-microtus oeconomus. using a staining technique based upon the prese ... | 1979 | 381906 |
| [leptospira distribution in the soil of a natural focus of the infection (an attempt at the radioisotopic labelling of infected voles)]. | the mass radioisotope (32p) labelling of all tundra voles excreting zeptospira, infected urine was carried out over the area of 1 ha, and the results of the experiment analyzed by the method of planar coherent graphs, showed the irregular (spotted) distribution of "infected spots", i. e. soil patches contaminated by zeptospira. the borders of individual small foci of infection did not coincide with the outlines of soil and vegetational divisions of the area. the spatial structure of the "extraor ... | 1979 | 380242 |
| sensitivity of european microtines to injected cdcl2. | basic histologic and metabolic indices of damage to the testes by cdcl2 were observed in six species of rodents: lagurus lagurus, pitymys subterraneus, microtus oeconomus, m. agrestis, clethrionomys glareolus (and mus musculus for comparison). all species showed discoloration of the subcapsular tissues and damage to the testicular parenchyma. testes of all species receiving cdcl2 utilized from 43% to 76% less oxygen than did those from untreated individuals. cadmium treatment preceded few signif ... | 1979 | 232358 |
| [estimation of long-time effects of chernobyl aes accident on behavior markers in a small rodent population]. | differences in behaviour reactions in "open field" and glycemia under conditions of immobilisation stress of vole (microtus oeconomus, pallas) from two groups ("yanov" and "lelev") were investigated. rodents were ensnared from two populations reproduced for a long time (11 years) in the areas of chnpp exclusion zone with different level of radioactive contamination. the radiation absorbed dose for animals of "yanov" group (external and internal irradiation) was 11-20 times higher than that of "l ... | 2003 | 14963936 |
| [genogeographic variability and genetic differentiation of the root vole (microtus oeconomus pallas, 1776, cricetidae, rodentia) from the kuril islands]. | electrophoretic analysis of 12 enzyme systems and 3 nonenzyme proteins (in all, 24 interpretable loci) was carried out for microtus oeconomus from ten kuril islands, kamchatka peninsula, and the vicinity of the city of magadan. gene geographic variation was examined and the coefficients of genetic variation and differentiation were estimated. the inter-population allozyme differentiation was low (dnei, 1972 not higher than 0.053) and caused by variation in the allele frequencies of polymorphic l ... | 2003 | 14658341 |
| studies on the helminth fauna of alaska. xv. some notes on the cysticercus of taenia polyacantha leuckart, 1856, from a vole (microtus oeconomus operarius nelson). | | 1953 | 13053323 |
| molecular typing by pulsed-field gel electrophoresis of bacillus thuringiensis from root voles. | the root voles intestinal strains of bacillus thuringiensis, were characterised by pulsed-field gel electrophoresis (pfge). for 14 isolates, three pulsotypes were found, with the use of smai or noti as restriction enzymes. strains in each pulsotypes presented identical dna patterns, indicating that the population structure of b. thuringiensis from root voles is clonal. the similarities in banding patterns were estimated at 56% and 33% for smai and noti digests, respectively. the strains under st ... | 2003 | 12732973 |
| [species specificity of karyotype instability under conditions of radionuclide contamination (the chernobyl nuclear power plant) in the voles, micrototus oeconomus, micrototus arvalis, and clethrionomys glareolus]. | the comparative analysis of frequencies of different type cytogenetic anomalies in voles microtus oeconomus, microtus arvalis, clethrionomys glareolus trapped in territories with different levels of radionuclide contamination inside the 30-km zone of estrangement around the chernobyl npp was carried out. animals with constitutive chromosome abnormalities were not revealed. the frequency of lympocytes with micronuclei was the most universal and sensitive character to chronic low-dose radiation in ... | 2001 | 11589050 |
| [the phospholipid composition of the liver in root voles living under different radioecological conditions]. | the effect of the increased natural radiation background (within some areas in komi republic) and man-caused radioactive contamination in the chernobyl npp accident zone on the composition of liver phospholipids in microtus oeconomus inhabiting these areas was studied. the significant changes in the liver lipid composition in rodents inhabiting both the chernobyl accident zone and the areas with the increased natural radiation background were found. the maximal changes in the liver phospholipid ... | 2000 | 10907414 |
| identification of x and y spermatozoa in the northern vole, microtus oeconomus. | | 1993 | 45952 |
| [spontaneous mixed infection in rodents with borrelia and leptospira]. | this study was performed in a natural itbb focus located in perm' region of russia. in 1993-1995, 73 root voles (microtus oeconomus), collected in the forests, were examined by means of inoculation of internal organs on bsk-ii medium. borrelia were found in 13 animals (17.8%). according to the results in rlfp analysis 11 isolates were classified as b. garinii, 1 as b. afzelii and 1 as mixture of b. garinii and b. afzelii. in one case leptospira, which was identified by pfge analysis as grippotyp ... | 1996 | 9026677 |
| [biochemical changes in the brain of the root vole (microtus oeconomus) from a 30-kilometer zone around the chernobyl atomic electric power station]. | deviations in lipid peroxidation parameters and in activity of dehydration enzymes in the brain of the tundra voles inhabiting areas with higher level of technogenic contamination (the 30-km zone of the chernobyl npp and the republic of komi) have been analyzed. during the first years after the disaster a decrease in the lipid antioxidative status of the brain and dehydrogenase activity, changes in the lipid composition of voles trapped in the disaster zone in comparison with control ones were m ... | 1996 | 9005669 |
| [the isolation of borrelia from the tick ixodes trianguliceps (ixodidae) and the possible significance of this species in the epizootiology of ixodid tick-borne borrelioses]. | ixodes trianguliceps is a common tick species of the eurasian forest zone. these ticks live probably in natural foci of ixodid tick-borne borrelioses (itbb) from western europe to transbaikalia, but their role in circulation of corresponding pathogens remains unclear. this study was performed in a natural itbb focus located in the perm region of russia (near the urals), where borrelia garinii and b. afzelii circulate and i. persulcatus serves as their main vector. in july-august of 1994, 296 sma ... | 1996 | 8975209 |
| [the epidemiological and epizootiological characteristics of leptospirosis in the republic of sakha (yakutia)]. | among zoonotic infections with natural foci in the republic of sakha (yakutia), leptospiroses have assumed greater importance. their morbidity is sporadic, mainly afflicting rural adults. the serogroups pomona, grippotyphosa, and icterohaemorrhagiae are prevalent in the etiological structure of leptospiras. an epizootiological survey has revealed natural and anthropurgic leptospirosis foci which present a hazard primarily to rural inhabitants who deal with animal husbandry, fur-bearer breeding, ... | 1996 | 8700015 |
| zoonotic reservoir of babesia microti in poland. | babesiosis is as one of the emerging human and animal diseases transmitted by ticks. it is caused intraerythrocytic parasites of the genus babesia. current evidence of human babesiosis suggests that the majority of cases are involved by babesia divergens and babesia microti piroplasms. as zoonotic reservoir of b. microti serve small mammals--insectivores and rodents. the occurrence of this parasite in natural environment in poland is documented for various regions, in the wide range of mammal ho ... | 2004 | 15787199 |
| significant morphological but little molecular differences between trypanosoma of rodents from alaska. | we examined blood smears of 173 rodents and 33 shrews captured at 4 sites in the gates of the arctic national park, northern alaska, in summer 2002. trypanosoma spp. were detected in the plasma of 5 microtus oeconomus, 4 microtus miurus, and 1 lemmus trimucronatus. the trypomastigote morphology from different individuals of m. oeconomus caught at the same site and of m. miurus from different sites varied significantly. the 4 dna sequences obtained from the blood smear positive samples contained ... | 2005 | 15856904 |
| [cytogenetic indices for somatic mutagenesis in mammals exposed to chronic low-dose irradiation]. | we used cytogenetic analysis in the studies of the biological effects of a radiation factor of natural and artificial origin (under conditions ofthe 30-km exclusion zone ofthe chernobyl experimental landfills in ukraine, belarus and russia). the studies have been performed on various types of mammals: domestic animals--cows, pigs, horses and rodents--root voles, the af mouse line, and yellow necked field mouse, bank voles. we found significant changes in the level of mn and chromosomal aberratio ... | 2016 | 25962274 |
| [the parameters of antioxidant status of tissues in the offspring of tundra vole (microtus oeconomus pall.) inhabiting areas with increased natural radioactivity]. | the parameters of the lipid peroxidation regulatory system (the antioxidative and antiperoxidant activities, the peroxide content, the lipid peroxidation intensity) in the tissues and the activities of the antioxidative defence enzymes (the peroxidase activity in blood, the superoxide dismutase activity in the blood erythrocytes) are studied in progeny of tundra vole which are reproduced from parent inhabiting areas with different radioecological environment during a long time. the progeny had t ... | 2005 | 16209195 |
| babesia microti: prevalence in wild rodents and ixodes ricinus ticks from the mazury lakes district of north-eastern poland. | infections of babesia microti (apicomplexa, piroplasmida), a common erythroparasitic protozoon of holarctic rodents, are not widely acknowledged in poland. the presence of this parasite in various species of wild rodents has been well documented throughout the northern temperate zone of north america, europe, and eurasia. however, human babesiosis attributable to infection with b. microti has been reported only from the north-eastern and upper midwestern united states and japan. we recently carr ... | 2006 | 16524774 |
| [phospholipids content in tissues of microtus oeconomus living in the areas with elevated level of radiation]. | | 2006 | 16808279 |
| diversities in hepatic hif-1, igf-i/igfbp-1, ldh/icd, and their mrna expressions induced by cocl(2) in qinghai-tibetan plateau mammals and sea level mice. | ochotona curzoniae and microtus oeconomus are the native mammals living on the qinghai-tibetan-plateau of china. the molecular mechanisms of their acclimatization to the plateau-hypoxia remain unclear. expressions of hepatic hypoxia-inducible factor (hif)-1alpha, insulin-like growth factor-i (igf-i)/igf binding protein (bp)-1(igfbp-1; including genes), and key metabolic enzymatic genes [lactate dehydrogenase (ldh)-a/isocitrate dehydrogenase (icd)] are compared in qinghai-tibetan-plateau mammals ... | 2007 | 16990490 |
| chromosomal evolution of arvicolinae (cricetidae, rodentia). i. the genome homology of tundra vole, field vole, mouse and golden hamster revealed by comparative chromosome painting. | cross-species chromosome painting has become the mainstay of comparative cytogenetic and chromosome evolution studies. here we have made a set of chromosomal painting probes for the field vole (microtus agrestis) by dop-pcr amplification of flow-sorted chromosomes. together with painting probes of golden hamster (mesocricetus auratus) and mouse (mus musculus), the field vole probes have been hybridized onto the metaphases of the tundra vole (microtus oeconomus). a comparative chromosome map betw ... | 2007 | 17497247 |
| [influence of the chronic gamma-irradiation at the low doses during the near ontogenesis periods on the oxidative processes in rodent organs]. | it is shown that the effect of the low intensity gamma-irradiation at the dose of 5.5 cgy during the 4 months including the antenatal period causes the most substantial changes of the peroxide content in the liver and in brain lipids and of tba-reactive substances amount in organs and blood plasma of tundra vole f2 which are reproduced from parents during long-term inhabiting on the ra-contaminated area in the komi republic. the consequences of the chronic gamma-irradiation at the doses of 4 cgy ... | 2007 | 17953437 |
| genetic analysis of hantaviruses carried by myodes and microtus rodents in buryatia. | hantavirus genome sequences were recovered from tissue samples of myodes rufocanus, microtus fortis and microtus oeconomus captured in the baikal area of buryatia, russian federation. genetic analysis of s- and m-segment sequences of buryatian hantavirus strains showed that myodes-associated strains belong to hokkaido virus (hokv) type while microtus-associated strains belong to vladivostok virus (vlav) type. on phylogenetic trees buryatian hokv strains were clustered together with m. rufocanus- ... | 2008 | 18190679 |
| [spatio-temporal interrelations of three sympatric species of voles (mammalia: rodentia) in the south urals]. | the structural and functional organization and the spatio-temporal interrelations of three sympatric vole species (microtus oeconomus, clethrionomys, rutilus, and c. rufocanus) were analyzed on territories different in the type of their functional significance to the animals (survival stations, zones of temporary dispersal, and transit zones). the study was conducted in the environs of the iremel massif (54 degrees 31'25" n 58 degrees 50'18" e) in 1979-1981, in four 1 ha marking-areas in four di ... | 2007 | 18257290 |
| utilisation of rodent species by larvae and nymphs of hard ticks (ixodidae) in two habitats in ne poland. | the impact of host identity and habitat type on the density of hard ticks (ixodes ricinus and dermacentor reticulatus) infections on rodents in forest and abandoned field habitats in ne poland was investigated. ixodes ricinus was most abundant in the forest system, but d. reticulatus, although rarer, was most abundant in the field system. environmental humidity and the much lower density of rodents probably limited the abundance of i. ricinus larvae in the field system, although this tick was st ... | 2010 | 19421876 |
| [the dynamics of tundra vole populations and accumulation of natural radionuclides in the territories with increased level of radioactive pollution]. | the analysis of natural radionuclide (226ra) contamination and tundra vole (microtus oeconomus pall.) relative number (from the sixties of 20-th century to 2007) reveals the impotent role of murine rodents in radionuclide migration. as a result of their pawing and of radionuclides carry-over by plants on the soil surface since the beginning of 1990 to present time the increase of 226ra content in animals from control and radioactive plots have been ascertain. in the plots under study tundra vole ... | 2009 | 19507685 |
| [a novel fluorescence reagent for the analysis of trace free oestradiol and oestriol in urine by reversed-phase high performance liquid chromatography with fluorescence detection and mass spectrometry identification]. | a new fluorescent derivatization reagent, 10-ethyl-9-oxo-9, 10-dihydroacridine-2-sulfonyl chloride (easc), was synthesized. a pre-column derivatization with easc and reversed-phase high performance liquid chromatographic (rp-hplc) method with fluorescence (fl) detection and mass spectrometry (ms) identification was performed for the trace analysis of oestradiol (e2) and oestriol (e3) in urine. this reagent shows higher sensitivities in ultraviolet (uv), fl and ms detection than those of dansyl c ... | 2009 | 19626842 |
| temporally stable genetic variability and dynamic kinship structure in a fluctuating population of the root vole microtus oeconomus. | genetic variability, kin structure and demography of a population are mutually dependent. population genetic theory predicts that under demographically stable conditions, neutral genetic variability reaches equilibrium between gene flow and drift. however, density fluctuations and non-random mating, resulting e.g. from kin clustering, may lead to changes in genetic composition over time. theoretical models also predict that changes in kin structure may affect aggression level and recruitment, le ... | 2010 | 20561198 |
| [comparative analysis of phospholipid composition in erythrocytes of mouse-like rodents of different species]. | comparative analysis of phospholipid quantitative composition of blood erythrocytes has been performed in white (laboratory mice and rats) and wild (tundra voles) mouse-like rodents. a non-characteristic of mammals low relative content of sphingomyelin is revealed in erythrocyte phospholipids in tundra voles. a hypothesis is put forward that the unique composition of erythrocyte lipids is a peculiar evolutionary developed strategy of adaptation aimed at survival under condition of constant circu ... | 2011 | 21598700 |
| [Southern taiga combined natural foci of spirochetoses]. | Study of possibility of existence of combined natural foci of spirochetoses (ixodes tick borrelioses and leptospiroses) in typical taiga forests, and their etiologic and reservoir-host structure. | 2011 | 22145345 |
| cytochrome b gene (cytb) sequence diversity in a microtus oeconomus population from bialowieza primeval forest. | based on published information about the glacial, postglacial, and recent distribution of the root vole, microtus oeconomus, we hypothesized that a population inhabiting the pristine wetland in eastern poland (bialowieza primeval forest) might comprise a high diversity of haplotypes. the support for this hypothesis was provided by an analysis of partial cytb gene sequences from 149 voles sampled within a two-hectare plot during a nine-year study. in this population, we identified eight haplotype ... | 2012 | 23538781 |
| the tundra vole (microtus oeconomus) as a laboratory animal. | | 1976 | 333180 |
| prevalence, genetic identity and vertical transmission of babesia microti in three naturally infected species of vole, microtus spp. (cricetidae). | vertical transmission is one of the transmission routes for babesia microti, the causative agent of the zoonotic disease, babesiosis. congenital babesia invasions have been recorded in laboratory mice, dogs and humans. the aim of our study was to determine if vertical transmission of b. microti occurs in naturally-infected reservoir hosts of the genus microtus. | 2017 | 28166832 |
| a new intermediate host for echinococcus multilocularis: the southern red-backed vole (myodes gapperi) in urban landscape in calgary, canada. | human alveolar echinococcosis (hae) is a potentially fatal parasitic disease caused by echinococcus multilocularis, a cestode characterized by a sylvatic life-cycle involving several species of rodents and lagomorphs as intermediate hosts and canids as definitive hosts. despite the wide distribution of the parasite in north america, the number of competent intermediate host species identified to date is still relatively small, and mainly includes the northern vole (microtus oeconomus), brown lem ... | 2013 | 23608104 |
| metagenomic evaluation of bacteria from voles. | voles (arvicolinae, rodentia) are known carriers of zoonotic bacteria such as bartonella spp. and francisella tularensis. however, apart from f. tularensis, the bacterial microbiome of voles has not previously been determined in finland and rarely elsewhere. therefore, we studied liver samples from 61 voles using 16s ribosomal rna gene pcr analysis, followed by sanger sequencing. twenty-three of these samples were also studied with tag-encoded pyrosequencing. the samples originated from 21 field ... | 2017 | 27854567 |
| the transstadial persistence of tick-borne encephalitis virus in dermacentor reticulatus ticks in natural conditions. | there are a number of reports regarding natural infection of dermacentor reticulatus ticks with tbe virus; however, the transmission mode of tbe virus in this tick population has not been investigated. this study was conducted in białowieża primeval forest, east poland. forty fully engorged nymphs of d. reticulatus were sampled from root voles (microtus oeconomus). ticks were kept until molting. all ticks were screened for the presence of tbe virus by nested rt-pcr. three adult ticks were positi ... | 2016 | 26751892 |
| vole preference of bilberry along gradients of simulated moose density and site productivity. | browsing by large herbivores might either increase or decrease preference for the plant by other herbivores, depending on the plant response. using a cafeteria test, we studied the preference by root voles (microtus oeconomus [pallas, 1776]) for bilberry (vaccinium myrtillus l.) previously subjected to 4 levels of simulated moose (alces alces [linnaeus, 1758]) density. the different levels of moose density were simulated at population densities relevant for fennoscandian conditions, in exclosure ... | 2011 | 22182326 |
| cyclic voles and shrews and non-cyclic mice in a marginal grassland within european temperate forest. | cyclic population dynamics of small mammals are not restricted to the boreal and arctic zones of eurasia and north america, but long-term data series from lower latitudes are still less common. we demonstrated here the presence of periodic oscillations in small mammal populations in eastern poland using 22-year (1986-2007) trapping data from marginal meadow and river valley grasslands located in the extensive temperate woodland of białowieża primeval forest. the two most common species inhabitin ... | 2012 | 22707756 |
| [developmental instability of the organism as a result of pessimization of environment under anthropogenic transformation of natural landscapes]. | the value of fluctuating asymmetry is considered to be an indicator of the developmental instability of the organism. the consequences of activities of the mining industry plants, which are characterized by alienation and transformation of large areas of natural landscapes, are analyzed as an anthropogenic factor. the objects of study were small mammals (northern red-backed (clethrionomys rutilus) and gray red-backed (clethrionomys rufocanus) voles, tundra vole (microtus oeconomus), laxmann's (s ... | 2015 | 25720274 |
| effect of birch (betula pendula) bark and food protein level on root voles (microtus oeconomus): ii. detoxification capacity. | the effect of protein and birch bark powder (bbp) content of forage on detoxification capacity of root voles (microtus oeconomus) was studied. young voles were fed with eight different diets for two weeks. individuals on low (3%) protein diets had significantly lighter livers and kidneys than those on moderate (6%) or high (12%) protein diets. birch bark powder addition did not have significant effect on organ weight. detoxification was significantly induced, apparently due to secondary compound ... | 1996 | 24227580 |
| effect of birch (betula pendula) bark and food protein level on root voles (microtus oeconomus): i. food consumption, growth, and mortality. | the effect of protein and birch bark powder (bbp) content of forage on food consumption and growth of root voles (microtus oeconomus) was studied by feeding young voles with eight different diets for two weeks. voles ate more when the protein content of forage was moderate (6%) or low (3%), and when bbp was added to the diets, as compared to a high (12%) protein diet without bbp addition. on high and moderate protein diets voles gained weight, whereas on low protein diets they lost weight. addit ... | 1996 | 24227579 |
| population dynamics of the collared lemming and the tundra vole at pearce point, northwest territories, canada. | from 1987 to 1989 we monitored population changes during summer of the collared lemming (dicrostonyx groenlandicus) and the tundra vole (microtus oeconomus) at pearce point, northwest territories, canada (69° 48' n, 122° 40' w). populations on four study areas did not cycle but remained at low density (<3/ha) each year and continued at low numbers for the following 3 years (reid et al. 1995). lemming numbers often declined throghout the summer in spite of continous reproduction, and population r ... | 1995 | 28306997 |
| [seasonal changes in the energy metabolism of subarctic rodents]. | in widespread species, northern taiga voles, most significant differences in the intensity of energy metabolism (m), maximum (mmax) and reserve (mres) metabolism were observed at winter temperatures (-5-20 degrees c): clethrionomys rutilus greater than c. rufocanus greater than microtus oeconomus; differences in seasonal increase of mmax and mres exhibit an inverse proportion. seasonal changes in m and mmax in autochthonous tundra rodents indicate that lemmus sibiricus belongs to a more eurybion ... | 2006 | 2596207 |
| [the taxonomic independence of anoplocephaloides spp. (cestoda: anoplocephalidae) with serial alternation of the genital atria]. | the mutual dispositions of the genital apertures in the anoplocephalidean strobila and their taxonomical significance were considered. the irregular alternations of single genital apertures from the alternations of its seria on the proglottid margins could be distinguished. the serial alternation as an intermediate type in the transformation from the irregular to unilateral dispositions of the genital apertures were considered. the conclusion about the anoplocephaloides spp. with the serial alte ... | 2007 | 8984444 |
| occurrence of a syngamus sp. in tundra voles (microtus oeconomus) collected on st. lawrence island, bering sea. | a species of syngamid nematode belonging to the genus syngamus was found in the respiratory tract (terminal trachea to bronchi) of tundra voles (microtus oeconomus) collected on st. lawrence island, alaska (usa). its prevalence in june 1989 was greater than 29% (12 of 41 male voles and seven of 24 females) in the village of savoonga, while no nematodes were found from 41 voles collected in the village of gambell. lesions included dilatation of parasitized respiratory ducts and peribronchial and ... | 1992 | 1548793 |
| [ectoparasites and phoresants of the root vole (microtus oeconomus pall.) in the polesye]. | drainage melioration in the polesye resulted in a sharp increase in the number of tundra vole (microtus oeconomus pall.) which quickly included into the parasitocenosis of the drained land. there were found 26 parasitic and nonparasitic species of gamasoidea, 3 species of ixodidae and 2 species of trombiculidae, 10 species of aphaniptera, 3 species of anoplura but there was found no species specific only for the tundra vole. all found parasites occur on many hosts. this explains wide parasitic l ... | 2010 | 2976144 |
| chromosomal polymorphism in the peripheral population of the root vole mirotus oeconomus (rodentia, arvicolinae) of the valdai national park. | | 2014 | 24659283 |
| relationships between dominance, testosterone level and scent marking of males in a free-living root vole (microtus oeconomus) population. | in many species, dominance increases a male's mating success via intrasexual competition and/or female choice. the level of androgen hormones, mainly testosterone (t), the intensity of scent marking and body mass are traits that are known to be linked to mammalian male social rank. recently, however, it has been noted that this link between male dominance and the aforementioned traits in natural free-living populations is not universal and does not exist in some species. that is why we tested th ... | 2014 | 24522243 |
| [function of the thyroid gland of tundra voles living on sites with the increased natural radioactivity]. | we studied a functional condition of the thyroid gland of tundra voles living on sites with the increased level of a natural radioactivity (in republic komi areas in russia). we have revealed that the functional condition of the thyroid gland depends on the phase of the population cycle of animals. the level of thyroid hormones in the irradiated animals differed from the norm; a high concentration of hormones in the irradiated animals was observed in the phase of the maximum number of animals, w ... | 2016 | 24450213 |
| [voles (microtus schrank, 1798) of the russian far east: allozymic and karyological divergence]. | the intraspecific and interspecific differentiations of voles of the russian far east with respect to allozymic and karyotypic characteristics have been studied. the morphologically similar but karyotypically different species microtus oeconomus, m. fortis, m. maximowiczii, and m. sachaliensis are characterized by considerable allozymic differentiation. in these voles, the allozymic differentiation has been found to increase in the order adjacent populations-subspecies-species. the interspecific ... | 2009 | 19639872 |
| [phospholipid composition of blood erythrocytes of tundra voles (microtus oeconomus pall.) inhabiting under different radioecological conditions]. | phospholipid composition has been studied in blood erythrocytes of tundra voles microtus oeconomus inhabiting territories with normal and increased levels of natural radioactivity at different phases of the populational cycle. it has been shown that rearrangement in the lipid component of blood erythrocyte membranes in tundra voles from radioactively polluted areas are associated with intensification of the lipid peroxidation (lpo) processes and are similar to those observed at the organism natu ... | 2010 | 20297668 |
| food deprivation in the common vole (microtus arvalis) and the tundra vole (microtus oeconomus). | arvicolinae voles are small herbivores relying on constant food availability with weak adaptations to tolerate prolonged food deprivation. the present study performed a comparative analysis on the responses to 4-18 h of food deprivation in the common vole (microtus arvalis) and the tundra vole (microtus oeconomus). both species exhibited rapid decreases in the plasma and liver carbohydrate concentrations during phase i of fasting and the decline in the liver glycogen level was more pronounced in ... | 2008 | 17929028 |
| arctic small rodents have diverse diets and flexible food selection. | the ecology of small rodent food selection is poorly understood, as mammalian herbivore food selection theory has mainly been developed by studying ungulates. especially, the effect of food availability on food selection in natural habitats where a range of food items are available is unknown. we studied diets and selectivity of grey-sided voles (myodes rufocanus) and tundra voles (microtus oeconomus), key herbivores in european tundra ecosystems, using dna metabarcoding, a novel method enabling ... | 2013 | 23826371 |
| distinct post-transcriptional regulation of igfbp1 gene by hypoxia in lowland mouse and qinghai-tibet plateau root vole microtus oeconomus. | our previous study revealed the particular expression patterns of insulin-like growth factor 1 (igf1) and insulin-like growth factor binding protein 1 (igfbp1) in the qinghai-tibet plateau root vole (microtus oeconomus) under hypoxic challenge. here we report the molecular mechanisms of igf gene regulation associated with adaptation to hypoxia. m. oeconomus igf1 and igfbp1 were shown to be highly conserved. hypoxia (8.0% o2, 6h) did not change the liver-derived igf1 expression in either m. oecon ... | 2013 | 23748030 |
| holarctic phylogeography of the root vole (microtus oeconomus): implications for late quaternary biogeography of high latitudes. | a species-wide phylogeographical study of the root vole (microtus oeconomus) was performed using the whole 1140 base pair mitochondrial (mt) cytochrome b gene. we examined 83 specimens from 52 localities resulting in 65 unique haplotypes. our results demonstrate that the root vole is divided into four main mtdna phylogenetic lineages that seem to have largely allopatric distributions. net divergence estimates (2.0-3.5%) between phylogroups, as well as relatively high nucleotide diversity estimat ... | 2003 | 12753215 |
| [a method of comparison of dna polynucleotide sequences]. | the results of a comparative analysis of the kinetic curves of reassociation of dna of closely related species of microtus (microtus arvalis, microtus oeconomus oeconomus, microtus oeconomus chachlovi) are presented. a five power polynomial was used as a mathematical model of the kinetic dna reassociation curves. the values of polynomial coefficients and the theoretical value, both with statistical deviations dispersion, have been estimated with the help of a standard computer programme. the mod ... | 2006 | 765772 |
| habitat use by singing voles and tundra voles in the southern yukon. | we investigated how far competitive interactions influence the use of habitats and relative abundance of two species of microtus in the southwestern yukon. we worked in the ecotone between alpine tundra and subalpine shrub tundra where populations of singing voles (microtus miurus) and tundra voles (m. oeconomus) overlap little.we removed tundra voles from shrub tundra on one live-trapping area to look at the effect on the contiguous population of singing voles in alpine tundra. the removal of t ... | 1985 | 28310875 |
| heterogeneity of 90sr radioactive contamination at the head part of the east ural radioactive trace (eurt). | 1: we measured 90sr concentrations and beta particle flux density (bpfd) in 44 soil samples collected from four soil profiles across a central transect on the head of the east ural radioactive trace (eurt). the relationship between bpfd and 90sr concentration of each soil sample can be characterised by a linear regression model; 90sr concentration in the upper 12 cm soil layer can thus be assessed by measuring bpfd in the soil surface. 2: the bpfd on the soil surface was measured at 969 points a ... | 2017 | 27890298 |
| contribution of quantitative methods of estimating mortality dynamics to explaining mechanisms of aging. | accumulation of various types of unrepaired damage of the genome because of increasing production of reactive oxygen species and decreasing efficiency of the antioxidant defense system and repair systems can cause age-related diseases and emergence of phenotypic signs of senescence. this should lead to increasing vulnerability and to mortality monotonously increasing with age independently of the position of the species on the evolutionary tree. in this light, the survival, mortality, and fertil ... | 2015 | 26638679 |
| the synergistic effect of density stress during the maternal period and adulthood on immune traits of root vole (microtus oeconomus) individuals-a field experiment. | the literature reveals that stress in early life or adulthood can influence immune function. as most studies on this are from the laboratory, there is a need for replicated studies in wild animals. this study aims to examine the effects of density stress during the maternal period and adulthood on immune traits of root vole (microtus oeconomus) individuals. four replicated high- and low-density parental populations were established, from which we obtained offspring and assigned each into four en ... | 2016 | 26373286 |
| [some aspects of structural alterations of erythrocyte membranes under the effect of uranyl chloride at low concentrations]. | the influence of nanomolar concentrations of the uranyl ion on the parameters of some membrane structures of rodent erythrocytes (laboratory mice and tundra voles--classical objects of radioecological monitoring) was investigated in vitro. a high sensitivity of the tundra vole red blood cells to the uranyl influence was shown. this fact may be determined by the cross-species difference in the membrane structures of erythrocytes--the low sphingomyelin content in tundra voles. investigation into t ... | 2017 | 25962280 |
| effect of the abrasive properties of sedges on the intestinal absorptive surface and resting metabolic rate of root voles. | recent studies on grasses and sedges suggest that the induction of a mechanism reducing digestibility of plant tissues in response to herbivore damage may drive rodent population cycles. this defence mechanism seems to rely on the abrasive properties of ingested plants. however, the underlying mechanism has not been demonstrated in small wild herbivores. therefore, we carried out an experiment in which we determined the joint effect of abrasive sedge components on the histological structure of s ... | 2015 | 25524975 |
| immunocompetence and high metabolic rates enhance overwinter survival in the root vole, microtus oeconomus. | despite its presumed significance, the association between immune defence, energy expenditures and overwinter survival is rarely studied. we analysed individual variation in immunocompetence quantified as neutrophil-to-lymphocyte ratio (n/l), total white blood cells (wbc) and natural antibody levels, along with resting (rmr) and peak metabolic rates (pmr) and mortality during three consecutive winter seasons in a natural population of the root vole, microtus oeconomus. in early winter, wbc count ... | 2014 | 25519753 |
| parasite diversity at the holarctic nexus: species of arostrilepis (eucestoda: hymenolepididae) in voles and lemmings (cricetidae: arvicolinae) from greater beringia. | previously unrecognized species of hymenolepidid cestodes attributable to arostrilepis mas-coma & tenora, 1997 in arvicoline rodents from the greater beringian region and western north america are described. discovery and characterization of these tapeworms contributes to the recognition of a complex of cryptic species distributed across the holarctic region. three species are proposed: arostrilepis gulyaevi sp. n. is named for cestodes in myodes rufocanus from the republic of buryatia, southeas ... | 2013 | 24614481 |
| analysing diet of small herbivores: the efficiency of dna barcoding coupled with high-throughput pyrosequencing for deciphering the composition of complex plant mixtures. | in order to understand the role of herbivores in trophic webs, it is essential to know what they feed on. diet analysis is, however, a challenge in many small herbivores with a secretive life style. in this paper, we compare novel (high-throughput pyrosequencing) dna barcoding technology for plant mixture with traditional microhistological method. we analysed stomach contents of two ecologically important subarctic vole species, microtus oeconomus and myodes rufocanus, with the two methods. dna ... | 2009 | 19695081 |
| multiple paternity in free-living root voles (microtus oeconomus). | we used 10 microsatellite loci to determine the mating system and male reproductive success in a natural population of the root vole (microtus oeconomus). by genotyping 21 females and their 111 offspring (5.28+/-0.27 s.e. pups per female), we found evidence for multiple paternity in 38% of the litters sired by two or three males. paternity was not significantly skewed away from the null expectation of equal proportions of offspring sired in any of the multiple-sired litters, and the most success ... | 2009 | 19482071 |
| maternal effects and population regulation: maternal density-induced reproduction suppression impairs offspring capacity in response to immediate environment in root voles microtus oeconomus. | the hypothesis that maternal effects act as an adaptive bridge in translating maternal environments into offspring phenotypes, and thereby affecting population dynamics has not been studied in the well-controlled fields. in this study, the effects of maternal population density on offspring stress axis, reproduction and population dynamics were studied in root voles (microtus oeconomus). parental enclosures for breeding offspring were established by introducing six adults per sex into each of 4 ... | 2015 | 25327547 |
| shaving increases daily energy expenditure in free-living root voles. | experimental manipulation of energy expenditure has long been recognized as an effective means for identifying causative effects and avoiding confounded interpretations arising from spurious correlations. this approach has been successfully applied mainly to studies on birds, particularly on reproducing adults, whereas manipulations in mammals have proved more problematic. here, we tested the hypothesis that shaving off 50% of the dorsal pelage should effectively increase energy expenditure in w ... | 2014 | 25278468 |
| bears are simply voles writ large: social structure determines the mechanisms of intrinsic population regulation in mammals. | the literature reveals opposing views regarding the importance of intrinsic population regulation in mammals. different models have been proposed; adding importance to contrasting life histories, body sizes and social interactions. here we evaluate current theory based on results from two scandinavian projects studying two ecologically different mammal species with contrasting body sizes and life history traits: the root vole microtus oeconomus and the brown bear ursus arctos. we emphasize four ... | 2014 | 24481982 |
| [morphological variability of microtus oeconomus pallas (rodentia, rrvicolidae) from baikal region]. | the analysis of morphological variability of the ten samples of microtus oeconomus from islands of baikal and adjacent regions gas shown, that island samples differ from continental ones by complex of parameters, defining proportions of a skuul, mainly, proportions of an auditory region. island samples also differ higher indexes of complexity and asymmetry of morphotypes of the third upper molar. an environment of the baikal islands differ absence of the damp habitats preferred microtus oeconomu ... | 2016 | 17168467 |
| comparative solubilities and electrophoresis of microtine hemoglobins. | 1. the electrophoretic mobilities of the hemoglobins of 7 taxa of microtines were compared. microtus oeconomus, m. pennsylvanicus pullatus and m. xanthognatus showed identical 2-band patterns on electrophoresis of their hemoglobins while m. pennsylvanicus tananaensis showed only a single hemoglobin corresponding to the major band of the others. dicrostonyx rubricatus and d. stevensoni exhibited identical patterns different from the microtus species. lemmus sibiricus had a slow hemoglobin compone ... | 1977 | 400948 |
| microtus oeconomus (rodentia), a useful mammal for studying the induction of sex-chromosome nondisjunction and diploid gametes in male germ cells. | preliminary data indicate that chemicals can also increase the frequency of sex-chromosome nondisjunction. positive results--which certainly need further confirmation--have been obtained for mms, p-fluorophenylalanine, vincristine, procarbazine, carbendazim, and bleomycin. nocodazole, benomyl, colcemic, 6-mercaptopurine, and halothane were all negative at the concentrations tested. for the induction of diploid spermatids positive results were only obtained for mms and parafluorophenylalanine. in ... | 1979 | 387396 |
| seasonal regulations of energetics, serum concentrations of leptin, and uncoupling protein 1 content of brown adipose tissue in root voles (microtus oeconomus) from the qinghai-tibetan plateau. | survival of small mammals in winter requires proper adjustments in physiology, behavior and morphology. the present study was designed to examine the changes in serum leptin concentration and the molecular basis of thermogenesis in seasonally acclimatized root voles (microtus oeconomus) from the qinghai-tibetan plateau. in january root voles had lower body mass and body fat mass coupled with higher nonshivering thermogenesis (nst) capacity. consistently, cytochrome c oxidase activity and mitocho ... | 2006 | 16786335 |
| male turnover reduces population growth: an enclosure experiment on voles. | turnover of individuals is assumed to cause disruptions of social organization, followed by reduced reproduction and survival. we tested how male turnover (removal of resident males and their replacement by unfamiliar males) affected population performance in experimental root vole (microtus oeconomus) populations. the treatment simulated predation of adult males, with the subsequent replacement by immigrants, and provided insight into the interaction between extrinsic (i.e., predation) and intr ... | 2006 | 16634299 |