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spatial and temporal dynamics and molecular evolution of tula orthohantavirus in german vole populations.tula orthohantavirus (tulv) is a rodent-borne hantavirus with broad geographical distribution in europe. its major reservoir is the common vole (microtus arvalis), but tulv has also been detected in closely related vole species. given the large distributional range and high amplitude population dynamics of common voles, this host-pathogen complex presents an ideal system to study the complex mechanisms of pathogen transmission in a wild rodent reservoir. we investigated the dynamics of tulv prev ...202134208398
water vole management - could anticoagulant rodenticides stereochemistry mitigate the ecotoxicity issues associated to their use?cyclic water vole population explosions can be controlled in some european countries with anticoagulant rodenticides leading sometimes to wildlife poisonings due to the toxin's tissue persistence. here, we analyzed the pharmacokinetics of rodenticide residues in voles and we explored potential ways of improving the mass application of these agents based on the concept of stereoisomers. we demonstrated the dramatic persistence of bromadiolone in vole tissues with a hepatic half-life of about 10 t ...202033130091
spatio-temporal trends in richness and persistence of bacterial communities in decline-phase water vole populations.understanding the driving forces that control vole population dynamics requires identifying bacterial parasites hosted by the voles and describing their dynamics at the community level. to this end, we used high-throughput dna sequencing to identify bacterial parasites in cyclic populations of montane water voles that exhibited a population outbreak and decline in 2014-2018. an unexpectedly large number of 155 operational taxonomic units (otus) representing at least 13 genera in 11 families was ...202032528097
farmers' perceptions and knowledge of natural enemies as providers of biological control in cider apple orchards.while the importance of biological control for crop production is widely acknowledged, research on how farmers perceive on-farm natural enemies remains scarce. this paper examines cider-apple farmers' perceptions and knowledge of the concept of biological control and the specific organisms underpinning its provision (i.e. natural enemies) in the cider-apple orchards of asturias (n spain). although these orchards host a high diversity of natural enemies, certain pests continue to be a problem, e. ...202032392141
rats as potential reservoirs for neglected zoonotic bartonella species in flanders, belgium.bartonella spp. are vector-borne pathogens transmitted to humans via blood-sucking arthropods. rodents such as the black rat (rattus rattus) and norway rat (r. norvegicus) are thought to be the main reservoirs. an infection with rodent-associated bartonella spp. may cause severe symptoms in humans such as endocarditis and neuroretinitis. the current knowledge of bartonella prevalence in rats from western europe is scarce.202032381113
rodents helminth parasites in different region of iran.climate condition is expected to have significant in rodents' diversity and in the seasonal pattern of diseases carried by different rodents. in an effort to aid in the study of the biodiversity of parasites of rodents in different climate zoon we examined climate patterns in the parasite assemblages of different rodents from mar 2015 to feb 2016.202030069212
three-dimensional geometric morphometric analysis of the humerus: comparative postweaning ontogeny between fossorial and semiaquatic water voles (arvicola).different types of locomotion in phylogenetically close rodent species can lead to significantly different growth patterns of certain skeletal structures. in the present study, we compared the allometric and phenotypic trajectories of the humerus in semiaquatic (arvicola sapidus) and fossorial (arvicola scherman) water vole taxa, using three-dimensional geometric morphometrics, to investigate the relationships between functional and ontogenetic differences. results revealed shared humerus traits ...202033037838
do bromadiolone treatments to control grassland water voles (arvicola scherman) affect small mustelid abundance?the use of pesticides can affect non-target species by causing population declines through indirect intoxication. small mustelids (sms; weasels, mustela nivalis l.; stoats, mustela erminea l.) consume water voles (wvs, arvicola scherman s.) and can be exposed to bromadiolone, an anticoagulant rodenticide used in some countries to reduce wv damage to grasslands. here, we investigated whether bromadiolone affected sm abundance.201930175431
identification of potential chemosignals in the european water vole arvicola terrestris.the water vole arvicola terrestris is endemic to europe where its outbreak generates severe economic losses for farmers. our project aimed at characterising putative chemical signals used by this species, to develop new sustainable methods for population control that could also be used for this species protection in great britain. the water vole, as well as other rodents, uses specific urination sites as territorial and sex pheromone markers, still unidentified. lateral scent glands and urine sa ...201931804568
predictive modelling in paleoenvironmental reconstruction: the micromammals of manot cave, israel.this paper describes the micromammalian remains and paleoenvironment of the upper paleolithic sequence of manot cave (46-34 ka), southern levant. micromammal remains were identified from ahmarian (46-42 ka), levantine aurignacian (38-34 ka) and post-levantine aurignacian (34-33 ka) layers. to identify taphonomic agents, molar digestion was modelled for seven local raptor species, and model predictions were compared with observed digestion scores in the manot cave material. raptor species differe ...201931623862
absence of hantavirus in water voles and eurasian beavers in britain.hantaviruses are rna viruses (order bunyavirales, family hantaviridae) found in rodent, bat and insectivore reservoir-hosts and have been reported as an emerging significant zoonotic risk in europe. as part of two native semiaquatic rodent restoration projects, tissue and urine samples were tested for hantavirus from water voles (arvicola amphibius) (n=26, in 2015) and eurasian beavers (castor fiber) (n=20, covering 2010-2015) using a pan-hantavirus nested real-time pcr test. kidney and lung sam ...201930792326
reproduction and mortality rates in ecologically distinct species of murid rodents.the trade-off between reproduction and somatic maintenance is one of the most studied concepts of modern evolutionary ecology. this theory predicts a negative relationship between maximum species longevity and total reproductive output. however, studies performed on natural animal populations have found contradictory results, probably due to the unlikelihood of wild animals gaining both maximum longevity and maximum potential fecundity. a comparison of the mortality rates and reproductive output ...201930415296
seasonal variation of mastophorus muris (nematoda: spirurida) in the water vole arvicola amphibius from southern sweden.this study focused on the spirurid nematode mastophorus muris in water voles (arvicola amphibius) trapped in three regions in southern sweden during spring and fall 2013. the collection of water voles formed part of a larger project (emiro) on the cestode echinococcus multilocularis in rodents. the voles' stomach contents were examined for the presence of m. muris. prevalence, mean abundance and mean intensity of infection were calculated. a generalized linear model model was used to examine the ...201830369337
a finding of the red squirrel (rodentia, sciuridae, sciurus vulgaris linnaeus, 1758) and forest dormouse (rodentia, gliridae, dryomys nitedula linnaeus, 1778) in the pleistocene of the southern urals.the study deals with a new sample of the mammalian fossils from the pleistocene deposits of the ignatievskaya cave in southern urals (54°53' n, 57°46' e). among the rodent fossils, the teeth of red squirrel (sciurus vulgaris) and forest dormouse (dryomys nitedula) have been identified. the enamel differentiation quotient (sdq) of the water vole teeth matches the arvicola terrestris species from locations of the end of middle and late pleistocene (oxygen isotope stages, ois 6 and ois 5-2, respect ...201830171471
cis-bromadiolone diastereoisomer is not involved in bromadiolone red kite (milvus milvus) poisoning.anticoagulant rodenticides (ars) are widely used pesticides to control rodent populations. bromadiolone, a second generation anticoagulant rodenticide (sgars), is authorized in france to control the population of water voles (arvicola scherman). the persistence of sgars in rodents is responsible for secondary exposure or poisoning of predators and scavengers, and is of ecological concern for the conservation of endangered species. commercial formulations are a mixture of two diastereoisomers of ...201728605859
consequences of organ choice in describing bacterial pathogen assemblages in a rodent population.high-throughput sequencing technologies now allow for rapid cost-effective surveys of multiple pathogens in many host species including rodents, but it is currently unclear if the organ chosen for screening influences the number and identity of bacteria detected. we used 16s rrna amplicon sequencing to identify bacterial pathogens in the heart, liver, lungs, kidneys and spleen of 13 water voles (arvicola terrestris) collected in franche-comté, france. we asked if bacterial pathogen assemblages w ...201728847331
reconstruction and prognosis of water vole population dynamics on the basis of tularemia morbidity among novosibirsk oblast residents. 201712705132
variable social rank of white-spotted male water voles: the effect of the presence of females. 201712577628
hierarchical spatial segregation of two mediterranean vole species: the role of patch-network structure and matrix composition.according to ecological theory, the coexistence of competitors in patchy environments may be facilitated by hierarchical spatial segregation along axes of environmental variation, but empirical evidence is limited. cabrera and water voles show a metapopulation-like structure in mediterranean farmland, where they are known to segregate along space, habitat, and time axes within habitat patches. here, we assess whether segregation also occurs among and within landscapes, and how this is influenced ...201627167226
morphogenetic response of the water vole (arvicola terrestris l.) to atypical environmental conditions. 201611013847
the relationship between coat color variation and population dynamics in the water vole (arvicola terrestris l.). 201610944724
[the morphological variability coordinated with the population cycle of the widely distributed (the water vole arvicola terrestris l.) and mountain (the big-eared vole alticola macrotis radde) vole species].this paper presents an analysis of variation of skull size and shape in the course of population cycles of two ecologically different vole species: water vole and high-mountain vole. we have found consistent changes of the direction, rate, and balance of morphogenesis during population cycles. we discuss the role of intra-populational factors and inter-populational variation during the territorial expansion of the species.201610780114
the role of neighborhood relations in maintenance of the spatial-ethological structure of local settlements as exemplified by the water vole (arvicola amphibius).adult males of the water vole have been found experimentally to recognize their neighbors and react to them differently depending on the degree of spatial proximity in nature. most tensions (estimated by the number of aggressive acts in the encounters) were observed between distant neighbors (from neighboring settlements), which did not belong to the same groups with established hierarchy and a relatively reduced aggression. these are probably perceived as the most likely competitors (because of ...201627595823
the colonization history of british water vole (arvicola amphibius (linnaeus, 1758)): origins and development of the celtic fringe.the terminal pleistocene and early holocene, a period from 15 000 to 18 000 before present (bp), was critical in establishing the current holarctic fauna, with temperate-climate species largely replacing cold-adapted ones at mid-latitudes. however, the timing and nature of this process remain unclear for many taxa, a point that impacts on current and future management strategies. here, we use an ancient dna dataset to test more directly postglacial histories of the water vole (arvicola amphibius ...201627122559
influence of reproductive status: home range size in water voles (arvicola amphibius).the relationship between home range and reproductive status of water voles (arvicola amphibius) was studied by radio-tracking on an island off the coast of northern norway in 2006-2009. the aim was to test assumptions about the species' social structure relative to other microtines. juveniles used fairly small ranges (about 400 m²), with no difference between males and females. subadults, overwintered voles in april, had ranges similar to juveniles. reproductively active males (mean 2774.0 m²) i ...201627115881
the presence of strange males' odor induces behavioral responses and elevated levels of low molecular weight proteins excreted in the urine of mature water vole males (arvicola amphibius l).we hypothesized that low molecular weight urinary proteins play a role in male-male chemical communication in the water vole, arvicola ampibius l. we studied the effect of placing soiled litter from strange males into the cage of another sexually mature male on the intensity of its digging and scattering, urination on the litter, and alteration in the levels of low molecular weight proteins (15-25 kda) excreted in the urine before and after 4 days of exposure as determined by chip electrophoresi ...201626994612
genome-wide comparative chromosome maps of arvicola amphibius, dicrostonyx torquatus, and myodes rutilus.the subfamily arvicolinae consists of a great number of species with highly diversified karyotypes. in spite of the wide use of arvicolines in biological and medicine studies, the data on their karyotype structures are limited. here, we made a set of painting probes from flow-sorted chromosomes of a male palearctic collared lemming (dicrostonyx torquatus, dto). together with the sets of painting probes made previously from the field vole (microtus agrestis, mag) and golden hamster (mesocricetus ...201626611440
high genetic structuring of tula hantavirus.tula virus (tulv) is a vole-associated hantavirus with low or no pathogenicity to humans. in the present study, 686 common voles (microtus arvalis), 249 field voles (microtus agrestis) and 30 water voles (arvicola spec.) were collected at 79 sites in germany, luxembourg and france and screened by rt-pcr and tulv-igg elisa. tulv-specific rna and/or antibodies were detected at 43 of the sites, demonstrating a geographically widespread distribution of the virus in the studied area. the tulv prevale ...201626831932
the ability to accumulate fat reserves during pregnancy inherited in the maternal line increases the viability and reproductive potential of daughters: an example of water voles arvicola amphibius. 201622945535
heterogeneous road networks have no apparent effect on the genetic structure of small mammal populations.roads are widely recognized to represent a barrier to individual movements and, conversely, verges can act as potential corridors for the dispersal of many small mammals. both barrier and corridor effects should generate a clear spatial pattern in genetic structure. nevertheless, the effect of roads on the genetic structure of small mammal populations still remains unclear. in this study, we examine the barrier effect that different road types (4-lane highway, 2-lane roads and single-lane unpave ...201627219505
sexual maturation of daughters depends on the mother's body condition during pregnancy: an example of the water vole arvicola terrestris l. 201617515043
[the environmental bases and mechanism for natural opisthorchiasis focus pulsation in the combined focus of opisthorchiasis and tularemia].a cyclic change in the epizootic activity of a tularemia activity underlies the mechanism of natural opisthorchiasis focus pulsation in the combined focus of opisthorchiasis and tularemia in the ecosystem of the konda river. this is due to mass breeding and depression in the water vole (arvicola terrestris) population. the mass breeding is predetermined by high population reproduction constants. the rodents' potential fecundity occurs with the high capacity of lands, which is caused by the hydro ...201526152031
leptospirosis acquisition following the reintroduction of wildlife.potential risks posed to domestic animals and human beings by zoonotic diseases in reintroduced animals can reduce the acceptability of reintroductions. the authors investigated the role of endangered water voles, arvicola amphibius, as a host for leptospirosis, a waterborne zoonosis affecting a range of mammals. based on samples from 112 individuals from across the uk, a 6.2 per cent exposure rate was found (7 animals were microscopic agglutination test (mat) positive for serum antibodies), wit ...201526483277
[correlations of reproductive parameters of water vole females (arvicola amphibius) with morphometric and hormonal characteristics].fluctuations in water vole population size depend on abiotic and intra-population factors affecting the physiological condition of females. the relationship between variability in reproductive success and morpho-physiological characteristics of female during pregnancy is studied quite poorly. in standard vivarium conditions, the morphometric and hormonal characteristics of female were assessed at different stages of pregnancy (first trimester--days 4-7, second trimester--days 8-14, third semeste ...201526027386
differential sex-dependent postimplantation embryo mortality of the water vole (arvicola amphibius). 201424659290
[dynamics of morphophysiological characteristics in female water voles (arvicola amphibius l.) during pregnancy].pregnancy and lactation need increased energy consumption and are accompanied by morphological and physiological changes of various maternal organs and systems. in water voles, connection of female interior characteristics has been poorly studied. under standard vivarium conditions, we evaluated morphophysiological parameters of non-reproducing females and of females at the early (1-7 days), intermediate (8-14 days), and late (15-21 days) stages of pregnancy. there were established effect of the ...201424459863
[hantaviruses in germany: threat for zoo, pet, companion and farm animals?].hantaviruses are so-called "emerging" and "re-emerging" viruses because of the new and sudden nature of their appearance. human infections can lead to two distinct disease patterns, the haemorrhagic fever with renal syndrome and the hantavirus cardiopulmonary syndrome. all known human pathogenic hantaviruses are transmitted through rodent hosts. there are three rodent-associated hantaviruses in germany. the bank vole-associated puumala virus (puuv) is responsible for most of the human hantavirus ...201424511827
unintentional wildlife poisoning and proposals for sustainable management of rodents.in europe, bromadiolone, an anticoagulant rodenticide authorized for plant protection, may be applied intensively in fields to control rodents. the high level of poisoning of wildlife that follows such treatments over large areas has been frequently reported. in france, bromadiolone has been used to control water voles (arvicola terrestris) since the 1980s. both regulation and practices of rodent control have evolved during the last 15 years to restrict the quantity of poisoned bait used by farm ...201424405288
[the postnatal ontogenetic characteristics of adrenal function in female water voles arvicola terrestris with different fur colors].studies have been made of the effect of colour mutation on the development of the adrenals in female aquatic voles. colour mutation in homozygote results in retarded growth rate of the whole body and the adrenals, as well as in postnatal changes in the dynamics of corticosteron content in the blood. obviously, the effect of colour mutation on plasma concentrations of corticosteron is realised mainly via extra-adrenal mechanisms since no differences were found in corticosteron production by the a ...20142560307
[functional characteristics of the adrenals in the ontogeny of male water voles arvicola terrestris with various fur colorings].studies have been made of the effect of colour mutations on the adrenal function in growing male voles. in postnatal life, the level of 11-oxycorticosteroids in the blood exhibited similar changes in brown (wild phenotype) and black (mutant) voles. the highest level was found in 1-2-month animals; a decrease took place to the 6th month which was followed by a secondary increase at the age of 8 months. corticosteron production in vitro is the highest in brown males 5-month. in black voles, after ...20142556872
scavenging of rodent carcasses following simulated mortality due to field applications of anticoagulant rodenticide.worldwide, agricultural uses of anticoagulant rodenticides (ars) cause poisonings of non-target wildlife as observed in france where bromadiolone is used to control water vole outbreaks. following bromadiolone field application, a part of the vole population may die aboveground of the treated plots and thus, can represent an important risk of secondary poisoning for scavengers. in this study, water voles were trapped in a non-treated area and their carcasses were placed aboveground in plots loca ...201425147048
[protein content in urine of male and female water vole (arvicola amphibious) at the period of spring growth and sexual maturation].the study was carried out on the captive bread water voles arvicola amphibious kept in vivarium. at the first decade of january, march, and june, the body length and anogenital distance were measured, the body mass was determined, and urine was collected for determination of its protein content. the obtained results have shown that the protein content depends on sex of the animals and is connected with the reproductive status of males and their dimension-weight characteristics. the urinary prote ...201323401970
[factors of stress in a local population of water vole].physiological mechanisms of stress have a multiple influence on the implementation of the adaptive capacity of individuals. from this perspective, analysis of factors determining the stress level of animals in changing environment acquires important ecological and evolutionary significance. in the paper the results are presented of long-term studies carried out at a site of irrigative channel being populated by water voles every year. the results show that high stress level of males is observed ...201322567968
[parasite fauna of the water vole (arvicola terrestris) and its nests in the south of western siberia].fauna of parasitic and free-living arthropods associated the water vole arvicola terestris and its nests in various landscape zones and subzones of the south of western siberia has been studied. total abundance of gamasid mites and ticks (gamasoidea, ixodidae), fleas and nidicolous arthropods in nests is high, and the set of nidicolous and parasite species is quite diverse, but everywhere the parasite fauna is characterized by a small amount of species reaching a high abundance: laelaps muris on ...201315069877
stress and demographic decline: a potential effect mediated by impairment of reproduction and immune function in cyclic vole populations.the stress response is initially adaptive, operating to maintain homeostasis. however, chronic long-term exposure to stressors may have detrimental effects. we proposed that chronic stress may be a major factor in demographic vole cycles, inducing decline in high-density populations. we monitored four populations of the fossorial water vole arvicola scherman, which undergo pluriannual demographic cycles in the jura mountains (france). sampling was conducted during the high densities and the decl ...201318040973
[early embryonic mortality in water vole (arvicola terrestris l.)].a morphological study of forty-eight 3-4-day embryos from eight females of the water vole (arvicola terrestris l.) was conducted. the data obtained demonstrated that early embryonic losses in the water vole can be 30-35%, and the main cause of these losses is anomalies of oogenesis.201323035586
influence of land mosaic composition and structure on patchy populations: the case of the water vole (arvicola sapidus) in mediterranean farmland.the ability of patchy populations to persist in human-dominated landscapes is often assessed using focal patch approaches, in which the local occurrence or abundance of a species is related to the properties of individual patches and the surrounding landscape context. however, useful additional insights could probably be gained through broader, mosaic-level approaches, whereby whole land mosaics with contrasting patch-network and matrix characteristics are the units of investigation. in this stu ...201323875014
the repelling effect of plant secondary metabolites on water voles, arvicola amphibius.water voles (arvicola amphibius linnaeus 1758) are abundant in most parts of germany and other european countries. they are known to cause serious damage in fruit and horticulture as well as in agriculture. currently available repellents, scaring devices and household remedies are mostly inefficient. tests were conducted to establish whether water voles can be repelled using plant secondary metabolites. these compounds are produced by many plant species as part of their defence against herbivore ...201323225271
effects of seasonal, ontogenetic, and genetic factors on lifespan of male and female progeny of arvicola amphibius.the water vole (arvicola amphibius) in the forest-steppe of west siberia is known to have wide fluctuations in abundance. these fluctuations are accompanied by changes in birth and death rates, sex-age structure of the population, and individual morphophysiological and behavioral characteristics of the animals. survival of the animals depends on season, phase of population cycle, and sex. based on the data of long-term captive breeding of water voles, the maximal lifespan of males was found to b ...201323802009
effective control of non-native american mink by strategic trapping in a river catchment in mainland britain.the introduction of american mink (neovison vison; hereafter mink) into europe has had severe impacts on many native wildlife species, including the water vole (arvicola amphibius) in mainland britain. although trapping has been widely used to attempt to control mink, managers have little direct evidence of its effect on mink density or distribution, particularly where immigration of mink from nearby areas is inevitable. such evidence is needed to justify the use of lethal methods in conservatio ...201323761940
genetic variability and structure of the water vole arvicola amphibius across four metapopulations in northern norway.water vole arvicola amphibius populations have recently experienced severe decline in several european countries as a consequence of both reduction in suitable habitat and the establishment of the alien predator american mink neovison vison. we used dna microsatellite markers to describe the genetic structure of 14 island populations of water vole off the coast of northern norway. we looked at intra- and inter-population levels of genetic variation and examined the effect of distance among pairs ...201323610623
multi-scale processes in metapopulations: contributions of stage structure, rescue effect, and correlated extinctions.metapopulations function and persist through a combination of processes acting at a variety of spatial scales. although the contributions of stage structure, spatially correlated processes, and the rescue effect to metapopulation dynamics have been investigated in isolation, there is no empirical demonstration of all of these processes shaping dynamics in a single system. dispersal and settlement differ according to the life stage involved; therefore, stage-specific population size may outperfor ...201223236917
measuring animal welfare within a reintroduction: an assessment of different indices of stress in water voles arvicola amphibius.reintroductions are an increasingly common conservation restoration tool; however, little attention has hitherto been given to different methods for monitoring the stress encountered by reintroduced individuals. we compared ten potential measures of stress within four different categories (neuroendocrine, cell function, body condition and immune system function) as proxies for animal welfare in water voles being reintroduced to the upper thames region, oxfordshire, uk. captive-bred voles were as ...201222815923
tula virus infections in the eurasian water vole in central europe.recent reports of novel hantaviruses in shrews and moles and the detection of rodent-borne hantaviruses in different rodent species raise important questions about their host range and specificity, evolution, and host adaptation. tula virus (tulv), a european hantavirus, is believed to be slightly or non-pathogenic in humans and was initially detected in the common vole microtus arvalis, the east european vole m. levis (formerly rossiaemeridionalis), and subsequently in other microtus species. h ...201222225425
birds and bornaviruses.in 2008, avian bornaviruses (abv) were identified as the cause of proventricular dilatation disease (pdd). pdd is a significant condition of captive parrots first identified in the late 1970s. abv infection has subsequently been shown to be widespread in wild waterfowl across the united states and canada where the virus infects 10-20% of some populations of ducks, geese and swans. in most cases birds appear to be healthy and unaffected by the presence of the virus; however, infection can also re ...201223253163
a synaptonemal complex-derived mechanism for meiotic segregation precedes the evolutionary loss of homology between sex chromosomes in arvicolid mammals.synapsis and reciprocal recombination between sex chromosomes are restricted to the pseudoautosomal region. in some animal species, sex chromosomes do not present this region, although they utilize alternative mechanisms that ensure meiotic pairing and segregation. the subfamily arvicolinae (rodentia, cricetidae) includes numerous species with achiasmate sex chromosomes. in order to know whether the mechanism involved in achiasmate segregation is an ancient feature in arvicolid species, we have ...201222552439
selection maintains mhc diversity through a natural population bottleneck.a perceived consequence of a population bottleneck is the erosion of genetic diversity and concomitant reduction in individual fitness and evolutionary potential. although reduced genetic variation associated with demographic perturbation has been amply demonstrated for neutral molecular markers, the effective management of genetic resources in natural populations is hindered by a lack of understanding of how adaptive genetic variation will respond to population fluctuations, given these are aff ...201222323362
are water vole resistant to anticoagulant rodenticides following field treatments?the anti-vitamin ks (avks) are widely used to control rodent populations. they inhibit vitamin k regeneration by the vitamin k epoxide reductase (vkor) and cause a fatal hemorrhagic syndrome. because of repeated use, some populations of commensal rodents have expressed resistance to these compounds. in franche-comté (france), the water vole exhibits cyclic population outbreaks. a second generation avk, bromadiolone, has been used for the last 20 years to control vole populations. the aim of this ...201121630005
prisoners in their habitat? generalist dispersal by habitat specialists: a case study in southern water vole (arvicola sapidus).habitat specialists inhabiting scarce and scattered habitat patches pose interesting questions related to dispersal such as how specialized terrestrial mammals do to colonize distant patches crossing hostile matrices. we assess dispersal patterns of the southern water vole (arvicola sapidus), a habitat specialist whose habitat patches are distributed through less than 2% of the study area (overall 600 km²) and whose populations form a dynamic metapopulational network. we predict that individuals ...201121931775
age, season and spatio-temporal factors affecting the prevalence of echinococcus multilocularis and taenia taeniaeformis in arvicola terrestris.taenia taeniaeformis and the related zoonotic cestode echinococcus multilocularis both infect the water vole arvicola terrestris. we investigated the effect of age, spatio-temporal and season-related factors on the prevalence of these parasites in their shared intermediate host. the absolute age of the voles was calculated based on their eye lens weights, and we included the mean day temperature and mean precipitation experienced by each individual as independent factors.201121247427
extraintestinal helminths of the common vole (microtus arvalis) and the water vole (arvicola terrestris) in western austria (vorarlberg).between september and december 2004, a total of 411 voles (318 common voles and 93 water voles) were caught in the austrian province of vorarlberg (lustenau, hohenems, and dornbirn) and were examined by macroscopy, microscopy, and molecular biological analysis to determine the presence and extent of medically important extraintestinal helminths. the following extraintestinal helminth species were detected: taenia taeniaeformis (liver), calodium hepaticum (liver), and echinococcus multilocularis ...201020148339
detection of toxoplasma gondii, neospora caninum, and encephalitozoon cuniculi in the brains of common voles (microtus arvalis) and water voles (arvicola terrestris) by gene amplification techniques in western austria (vorarlberg).knowledge about the protozoan parasite fauna in voles (arvicolinae) in austria is rather limited, although some of these pathogens play an important role in human medicine and cause zoonoses (e.g., toxoplasma gondii and encephalitozoon cuniculi). others are of relevance in veterinary medicine and have a negative economic impact (e.g., neospora caninum). two hundred sixty-eight common voles (microtus arvalis) and 86 water voles (arvicola terrestris) from the most western austrian province, vorarl ...201020480373
structure, organization and nucleotide diversity of the mitochondrial control region and cytochrome b of southern water vole (arvicola sapidus).the southern water vole (arvicola sapidus miller, 1908) is an endangered rodent whose conservation guidelines should preserve the current genetic variability. we analyze the structure and organization of the mitochondrial control region (cr) in a. sapidus. the cr of this species is characterized by a low guanine-cytosine content, the absence of any repetitive motif within the two hypervariable regions, and the presence of the two extended termination-associated sequences and conserved sequence b ...201020334495
[correlation between urine malondialdehyde level and males reproductive success in the water vole (arvicola terrestris l.)].the study was conducted in water vole (arvicola terrestris l.) reared and bred in captivity. during the breeding season, voles were caged in heterosexual pairs for two weeks. if mating did not occur, new pairs were formed with unfamiliar partners. in the end of the breeding season, the individual male's reproductive characteristics were summarized, and the level of malondialdehyde (mda) in their urine was assessed. as indicated by urine mda concentration, the intensity of lipid peroxidation in m ...201021473111
determination of bromadiolone residues in fox faeces by lc/esi-ms in relationship with toxicological data and clinical signs after repeated exposure.in many countries, the fox (vulpes vulpes), predator of small mammals, is particularly affected by anticoagulant rodenticides such as bromadiolone due to secondary poisoning. nevertheless, to date, no method of exposure monitoring is applicable in the field over large areas, and no toxicological data are available concerning sensitivity of foxes to bromadiolone. the aim of this work was to compare excretion kinetics of bromadiolone in fox faeces with clinical and haemostatic effects after repeat ...201020692656
estimating the value of non-use benefits from small changes in the provision of ecosystem services.the unit of trade in ecosystem services is usually the use of a proportion of the parcels of land associated with a given service. valuing small changes in the provision of an ecosystem service presents obstacles, particularly when the service provides non-use benefits, as is the case with conservation of most plants and animals. quantifying non-use values requires stated-preference valuations. stated-preference valuations can provide estimates of the public's willingness to pay for a broad cons ...201020560999
[physical state of mother at the period of pregnancy and sexual maturation of descendants-sons of the water vole (arvicola terrestris l.)].the role of characteristics of the maternal medium (the mother's physical state at periods of pregnancy and lactation, calendar terms of birth, the number of pups, and the ratio of sexes in the litter) has been elucidated in regulation of growth and the sexual maturation of the water vole male pups. the anogenital distance was used as an indirect supravital evaluation of the mass of testicles. the physical state of females was estimated by a change of the body mass at the period of pregnancy or ...201020432709
captive housing during water vole (arvicola terrestris) reintroduction: does short-term social stress impact on animal welfare?animals captive bred for reintroduction are often housed under conditions which are not representative of their preferred social structure for at least part of the reintroduction process. specifically, this is most likely to occur during the final stages of the release programme, whilst being housed during transportation to the release site. the degree of social stress experienced by individuals during this time may negatively impact upon their immunocompetence.201020352093
negative relationships between cellular immune response, mhc class ii heterozygosity and secondary sexual trait in the montane water vole.heterogeneities in immune responsiveness may affect key epidemiological parameters and the dynamics of pathogens. the roles of immunogenetics in these variations remain poorly explored. we analysed the influence of major histocompatibility complex (mhc) genes and epigamic traits on the response to phytohaemagglutinin in males from cyclic populations of the montane water vole (arvicola scherman). besides, we tested the relevance of lateral scent glands as honest signals of male quality. our resul ...201025567924
[the prognosis for the opisthorchiasis situation in an area influenced by hydraulic engineering works].basing on the materials of many years observation, literature and their own data, the authors consider expert prognostication methodology in regard to opisthorchiasis in hydro construction regions as exemplified by the shidertinsk focus and irtysh-karaganda canal. analysis of prognostication signs and alterations connected with them showed that relatively satisfactory situation concerning opisthorchiasis for 10-year period of channel exploitation was provided by measures aiming at water bodies p ...20092534150
spatio-temporal variation in the strength and mode of selection acting on major histocompatibility complex diversity in water vole (arvicola terrestris) metapopulations.patterns of spatio-temporal genetic variation at a class ii major histocompatibility complex (mhc) locus and multiple microsatellite loci were analysed within and between three water vole metapopulations in scotland, uk. comparisons of mhc and microsatellite spatial genetic differentiation, based on standardised tests between two demographically asynchronous zones within a metapopulation, suggested that spatial mhc variation was affected by balancing selection, directional selection and random g ...200919140966
phylogeography of southern water vole (arvicola sapidus): evidence for refugia within the iberian glacial refugium?the role of southern european peninsulas as glacial refugia for temperate species has been widely established, but phylogeographic patterns within refugia are being only recently addressed. here we describe the phylogeographic patterns for southern water vole (arvicola sapidus) in its whole distribution across iberia and france. control region and cytochrome b sequences were obtained for 228 samples from 130 localities across iberia and france. eighty-five haplotypes were found in total yielding ...200919674304
major histocompatibility complex (mhc) heterozygote superiority to natural multi-parasite infections in the water vole (arvicola terrestris).the fundamental role of the major histocompatibility complex (mhc) in immune recognition has led to a general consensus that the characteristically high levels of functional polymorphism at mhc genes is maintained by balancing selection operating through host-parasite coevolution. however, the actual mechanism by which selection operates is unclear. two hypotheses have been proposed: overdominance (or heterozygote superiority) and negative frequency-dependent selection. evidence for these hypoth ...200919129114
do rabbits eat voles? apparent competition, habitat heterogeneity and large-scale coexistence under mink predation.habitat heterogeneity is predicted to profoundly influence the dynamics of indirect interspecific interactions; however, despite potentially significant consequences for multi-species persistence, this remains almost completely unexplored in large-scale natural landscapes. moreover, how spatial habitat heterogeneity affects the persistence of interacting invasive and native species is also poorly understood. here we show how the persistence of a native prey (water vole, arvicola terrestris) is d ...200919708968
the celtic fringe of britain: insights from small mammal phylogeography.recent genetic studies have challenged the traditional view that the ancestors of british celtic people spread from central europe during the iron age and have suggested a much earlier origin for them as part of the human recolonization of britain at the end of the last glaciation. here we propose that small mammals provide an analogue to help resolve this controversy. previous studies have shown that common shrews (sorex araneus) with particular chromosomal characteristics and water voles (arvi ...200919793757
[semi-aquatic animals as a source of water contamination with cryptosporidium and giardia].cryptosporidium and giardia spp. are parasitic protozoa localized in the alimentary tract of many animal species and humans. each of these parasite species produces very resistant invasive forms (cysts and oocysts) excreted to the environment with feces of infected hosts. water contaminated with cysts/oocysts constitutes one of the main transmission routes and is responsible for the majority of infections in humans. cryptosporidium and giardia spp. were found in many different species of animals ...200819338222
echinococcus multilocularis in belgium: prevalence in red foxes (vulpes vulpes) and in different species of potential intermediate hosts.echinococcus multilocularis causes a rare but potentially lethal zoonotic infection in humans. this tapeworm is known to be endemic in foxes in several countries of western and central europe. in western europe, the common vole (microtus arvalis) and the water vole (arvicola terrestris) are considered to be the most important intermediate host species of this cestode whereas the red fox is by far the most important final host. the purpose of this study was to provide data on the prevalences in w ...200818164551
multiple parasites mediate balancing selection at two mhc class ii genes in the fossorial water vole: insights from multivariate analyses and population genetics.we investigated the factors mediating selection acting on two mhc class ii genes (dqa and drb) in water vole (arvicola scherman) natural populations in the french jura mountains. population genetics showed significant homogeneity in allelic frequencies at the dqa1 locus as opposed to neutral markers (nine microsatellites), indicating balancing selection acting on this gene. moreover, almost exhaustive screening for parasites, including gastrointestinal helminths, brain coccidia and antibodies ag ...200818624885
serological evidence of viruses naturally associated with the montane water vole (arvicola scherman) in eastern france.we surveyed 12 populations of the montane water vole (arvicola scherman), previously known as the fossorial form of the water vole a. terrestris, in eastern france for antibodies (immunoglobulin g) to puumala virus (puuv), lymphocytic choriomeningitis virus (lcmv), and cowpox virus (cpxv). antibodies to puuv were found in 9 (5.5%) of 164 voles from 7 populations, antibodies to lcmv were found in 13 (26.0%) of 50 voles from 2 populations, and antibodies to cpxv were found in 66 (41.8%) of 158 vol ...200818752422
kinetics of bromadiolone in rodent populations and implications for predators after field control of the water vole, arvicola terrestris.we document the kinetics of bromadiolone in two rodent populations after a field control of water voles, and their implications for predator exposure. water voles and common voles were trapped aboveground and underground from 1 to 135 days after bromadiolone treatment in the field. livers, digestive tracts, and rests of the body were analyzed separately. our results indicate that 99.6% of the water voles trapped underground and 41% of the common voles trapped aboveground contain bromadiolone res ...200818954894
[effect of mother's physical condition during pregnancy and lactation on postnatal growth and reproductive success of offspring in water vole arvicola terrestris l].postnatal growth, life span, and probability of reproduction in the adult state depended on the mother's physical condition during pregnancy and lactation in water vole. the white fat weight in the female abdominal cavity was shown to significantly increase in pregnancy and to decrease in late lactation. as an indicators for nutritional state of females, their body weight difference after parturition (or in late lactation) and expected from the regression equation relating individual body weight ...200818669294
effects of forage availability on growth and maturation rates in water voles.1. in populations of small mammals, food supplementation typically results in higher population densities, body weights, growth rates and reproductive rates. however, few studies have demonstrated a relationship between forage levels and demographic rates in wild populations in the absence of supplementation. 2. we examined the association of levels of available forage with individual growth rates and time to sexual maturity in eight re-introduced and three naturally occurring populations of wat ...200818624743
acute poisoning of red kites (milvus milvus) in france: data from the sagir network.red kites (milvus milvus) are avian scavengers limited to europe, and they currently are listed as an endangered species worldwide. accidental poisoning is often listed as one of the threats to red kites throughout their range of distribution. the purpose of this article is to investigate the suspected poisoning cases reported to the french wildlife disease surveillance system. dead animals are submitted to a local veterinary laboratory for necropsy and when poisoning is suspected, samples are s ...200818436673
integrating coalescent and ecological niche modeling in comparative phylogeography.understanding the factors that contribute to the formation of population genetic structure is a central goal of phylogeographic research, but achieving this goal can be complicated by the stochastic variance inherent to genetic processes. statistical approaches to testing phylogeographic hypotheses accommodate this stochasticity by evaluating competing models of putative historical population structure, often by simulating null distributions of the expected variance. the effectiveness of these t ...200717542851
[influence of the phase of the number and demographic structure of the water vole population on its infection by helminthes].in this work we have analyzed results of the long-term investigations of the helminthes distribution in the various demography groups of the water vole population (arvicola terrestris l.) in north baraba (novosibirsk region). the data on the dominant parasites of these rodents: trematodes notocotylus noyeri (joyeux, 1922), cestodes limnolepis transfuga spassky et merkuscheva, 1967, nematodes capillaria wioletti ruchljadeva, 1950, longistriata minuta (dujarden, 1845) and heligmosomum costellatum ...200716316057
density-related changes in selection pattern for major histocompatibility complex genes in fluctuating populations of voles.host-pathogen interactions are of particular interest in studies of the interplay between population dynamics and natural selection. the major histocompatibility complex (mhc) genes of demographically fluctuating species are highly suitable markers for such studies, because they are involved in initiating the immune response against pathogens and display a high level of adaptive genetic variation. we investigated whether two mhc class ii genes (dqa1, drb) were subjected to contemporary selection ...200717956550
numerical response of a helminth community in the course of a multi-annual abundance cycle of the water vole (arvicola terrestris).the impact of parasitism on population dynamics is determined in part by the numerical responses of parasites during population fluctuations of their hosts. vole populations fluctuate in multi-annual cycles allowing such responses to be studied over successive phases of population growth, abundance and decline. we investigate how a helminth community (5 nematode and 7 cestode species) evolved over a full 6-year water vole (arvicola terrestris) population cycle. brillouin and individual parasite ...200717234045
linking demography and host dispersal to trichuris arvicolae distribution in a cyclic vole species.spatial structure in the distribution of pathogen infection can influence both epidemiology and host-parasite coevolutionary processes. it may result from the spatial heterogeneity of intrinsic and extrinsic factors, or from the local population dynamics of hosts and parasites. in this study, we investigated the effects of landscape, host dispersal and demography (population abundance and phase of the fluctuation) on the distribution of a gastro-intestinal nematode trichuris arvicolae in the fos ...200717350018
identification of sperm antigens as a first step towards the generation of a contraceptive vaccine to decrease fossorial water vole arvicola terrestris scherman proliferations.immunocontraceptive strategies have proved to be efficient in controlling fertility of various mammalian species. in the present study we have made the first steps towards the identification of arvicola terrestris sperm antigens that could be used as targets in the development of a contraceptive vaccine to limit the proliferations of this pest rodent. rabbit-raised polyclonal antisera directed against complete a. terrestris spermatozoa were used to identify and characterize on 2d-gels coupled wi ...200717645936
isolation and characterization of a mhc class ii drb locus in the european water vole (arvicola terrestris).in so-called model species, such as human and mouse, genes of the major histocompatibility complex (mhc) are characterized by extremely high levels of polymorphism, and it is considered that such diversity is maintained by balancing selection. ;there is now a recognized need to expand studies into nonmodel species to examine whether high mhc diversity is mirrored in natural populations, and to determine the ecological, ethological, and evolutionary processes that underpin balancing selection. to ...200616738936
emmonsia crescens infection in a british water vole (arvicola terrestris).emmonsia crescens, a dimorphic fungus of the order onygenales, is primarily a pathogen of lower animals and rarely humans. inhaled conidia of e. crescens fail to germinate in the lungs, and instead simply enlarge in lung tissue to become giant adiaspores. we present here the case of fatal emmonsia crescens infection in a wild-caught british water vole (arvicola terrestris). histopathological examination of the animal, which died in captivity, revealed a multifocally extensive granulomatous react ...200616772233
migration and recovery of the genetic diversity during the increasing density phase in cyclic vole populations.in cyclic populations, high genetic diversity is currently reported despite the periodic low numbers experienced by the populations during the low phases. here, we report spatio-temporal monitoring at a very fine scale of cyclic populations of the fossorial water vole (arvicola terrestris) during the increasing density phase. this phase marks the transition from a patchy structure (demes) during low density to a continuous population in high density. we found that the genetic diversity was effec ...200616842435
[bromadiolone poisoning in foxes].bromadiolone is an anticoagulant rodenticide that inhibits the reactivation of vitamin k1 by the enzyme vitamin k1-epoxide reductase. the present case report originated from the application of bromadiolone against water voles (arvicola terrestris) in northeastern switzerland. at least 40 foxes (vulpes vulpes) were found dead after the inappropriate use of a bait that contained 0.02 % bromadiolone. anticoagulant rodenticide poisoning was suspected on the basis of the postmortem examination and su ...200616933704
influence of geographical scale on the detection of density dependence in the host-parasite system, arvicola terrestris and taenia taeniaeformis.infection by the cestode taenia taeniaeformis was investigated within numerous cyclic populations of the fossorial water vole arvicola terrestris sampled during 4 years in franche-comté (france). the relative influence of different rodent demographic parameters on the presence of this cestode was assessed by considering (1) the demographic phase of the cycle; (2) density at the local geographical scale (<0.1 km2); (3) mean density at a larger scale (>10 km2). the local scale corresponded to the ...200616329763
widespread gene flow and high genetic variability in populations of water voles arvicola terrestris in patchy habitats.theory predicts that the impact of gene flow on the genetic structure of populations in patchy habitats depends on its scale and the demographic attributes of demes (e.g. local colony sizes and timing of reproduction), but empirical evidence is scarce. we inferred the impact of gene flow on genetic structure among populations of water voles arvicola terrestris that differed in average colony sizes, population turnover and degree of patchiness. colonies typically consisted of few reproducing adul ...200616629803
biodiversity in urban habitat patches.we examined the biodiversity of urban habitats in birmingham (england) using a combination of field surveys of plants and carabid beetles, genetic studies of four species of butterflies, modelling the anthropochorous nature of the floral communities and spatially explicit modelling of selected mammal species. the aim of the project was to: (i) understand the ecological characteristics of the biota of cities model, (ii) examine the effects of habitat fragment size and connectivity upon the ecolog ...200616297440
[ultrastructural organization of the inner medullary zone of the kidney of the water vole arvicola terrestris].papillary component ultrastructure and acid mucopolysaccharide distribution have been investigated in the kidney of the water vole a. terrestris. structural differences between the descending and ascending parts of the henle's loop are rather small, cell cytoplasm of these segments being poor in organells. unusual ultrastructure of the collecting duct epithelium with high level of cytoplasmic organization (elongated thin mitochondria, fairly developed golgi complex, numerous phagosomes and pinoc ...2006159594
the evolutionary radiation of arvicolinae rodents (voles and lemmings): relative contribution of nuclear and mitochondrial dna phylogenies.mitochondrial and nuclear genes have generally been employed for different purposes in molecular systematics, the former to resolve relationships within recently evolved groups and the latter to investigate phylogenies at a deeper level. in the case of rapid and recent evolutionary radiations, mitochondrial genes like cytochrome b (cyb) are often inefficient for resolving phylogenetic relationships. one of the best examples is illustrated by arvicolinae rodents (rodentia; muridae), the most impr ...200617029633
[massive multiplications of the water vole and their relation to solar activity]. 20065630338
phylogeographic structure and postglacial evolutionary history of water voles (arvicola terrestris) in the united kingdom.the phylogeographic pattern of mitochondrial dna variation in water voles (arvicola terrestris) from 57 localities across the united kingdom and representative samples from spain, france, switzerland and finland was determined from sequence variation in the central portion of the control region. twenty-seven different haplotypes were resolved which formed two distinct phylogenetic clades. this major division separated haplotypes found in scotland from those found in england and wales. nested cla ...200515813782
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