| hemoglobin and oxygen: different affinities in two species of rodents (mus musculus and pitymys duodecimcostatus). | five different hemoglobins have been demonstrated by polyacrylamide-gel disk electrophoresis in the species mus musculus. oxygen affinities of hemoglobin (p50) from mus musculus and pitymys duodecimcostatus hemolysates were determined at ph 7.4 and 37 degrees c. values obtained for delta log p50/delta ph in hemolysates from both species point out a more pronounced bohr effect in pitymys duodecimcostatus. | 1986 | 2874918 |
| hemoglobin components and plasma proteins in pitymys duodecimcostatus. | six different hemoglobins have been demonstrated by polyacrylamide disc gel electrophoresis in a species of vole pitymys duodecimcostatus. plasma proteins of the pitymys duodecimcostatus were analyzed by polyacrylamide disc gel electrophoresis and there was no significant difference with the electrophoretic patterns of the rat (rattus norvegicus). the hematological values, hematocrit, hemoglobin concentration and erythrocyte number have been analyzed. | 1985 | 3881213 |
| sex determination of microtus mandarinus mandarinus is independent of sry gene. | pcr was performed with primers corresponding to the sry hmg-box of the mouse and eight microtus species. primers for the sall4 gene and the zfy/zfx gene were used as positive controls. none of these sets of primers can amplify any homologous segment of the sry gene in the genomic dna of microtus mandarinus mandarinus, but both can amplify the sry hmg-box in the male mouse, sall4 bands, and zfy/zfx bands in both male and female m. m. mandarinus and mouse. southern blotting was also used. we used ... | 2008 | 18188648 |
| 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 ... | 2016 | 27219505 |
| 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 ... | 2012 | 22552439 |
| blood supply to the abdominal and pelvic regions in the mediterranean pine vole, microtus duodecimcostatus (rodentia, arvicolidae). | the abdominal and pelvic blood supply of the mediterranean pine vole (microtus duodecimcostatus) is described. a total of 13 individuals (seven males, six females) captured in the field (sanaüja, spain) were analysed by injection of coloured latex solution and subsequent dissection. the arrangements observed in all specimens show some common traits in relation to the patterns established in other arvicolidae studied (arvicola terrestris, clethrionomys glareolus, microtus h agrestis). these share ... | 1995 | 8588705 |
| design and testing of an agricultural implement for underground application of rodenticide bait. | an agricultural implement for underground application of rodenticide bait to control the mediterranean pocket gopher (microtus duodecimcostatus) in fruit orchards has been designed and tested. the main objective of this research was to design and test the implement by using the finite element method (fem) and considering a range of loads generated on most commonly used furrow openers in agricultural implements. as a second step, the prototype was tested in the field by analysing the effects of f ... | 2015 | 25602272 |
| genetic identification of iberian rodent species using both mitochondrial and nuclear loci: application to noninvasive sampling. | species identification through noninvasive sampling is increasingly used in animal conservation genetics, given that it obviates the need to handle free-living individuals. noninvasive sampling is particularly valuable for elusive and small species such as rodents. although rodents are not usually assumed to be the most obvious target for conservation, of the 21 species or near-species present in iberia, three are considered endangered and declining, while several others are poorly studied. here ... | 2013 | 23095787 |
| deep mitochondrial introgression and hybridization among ecologically divergent vole species. | the completion of speciation is typically difficult to ascertain in rapidly diverging taxa but the amount of hybridization and gene flow in sympatry or parapatry contains important information about the level of reproductive isolation achieved. here, we examined the progress in speciation between the mediterranean (microtus duodecimcostatus) and the lusitanian pine vole (m. lusitanicus), which are part of the most rapid radiation of species known in mammals. these two iberian pine voles are clas ... | 2012 | 23017079 |
| using presence signs to discriminate between similar species. | the lusitanian and the mediterranean pine voles (microtus lusitanicus gerbe, 1879 and microtus duodecimcostatus de selys-longchamps, 1839) are fossorial sister species and have an allopatric pattern of distribution in portugal, which includes a potential sympatry area in the centre of the country. the present study aimed to determine the validity of using presence signs in the field for discrimination of the two species in an area of sympatry (northern alentejo) and the characteristics that achi ... | 2009 | 21392297 |
| demography of a mediterranean microtine: the mediterranean pine vole,microtus duodecimcostatus. | microtus duodecimcostatus in a mediterranean vole which is not known to display spectacular increases in population numbers as in some microtine species. a population was studied in southern france with a capture-recapture method. the population included resident adults which have a high and constant survival rate (monthly estimate: 0.879), erratic adults (those caught once only), and juveniles which have a lower and constant survival rate. the adult survival rate was not sexbiased but the juven ... | 1993 | 28313310 |
| achiasmatic sex chromosomes in pitymys duodecimcostatus: mechanisms of association and segregation. | the meiotic behavior of the sex chromosomes of pitymys duodecimcostatus was studied by electron microscopy of whole-mount synaptonemal complex preparations. the results established that the sex chromosomes of this species are achiasmatic and remain unassociated throughout meiotic prophase i in most spermatocytes. in other cells, nonspecific association of the x and y occurred by means of filamentous bridges. pitymys duodecimcostatus represents an additional example of a mammalian species lacking ... | 1991 | 2013235 |
| the synaptic sequence in hydroxyurea-treated spermatocytes of pitymys duodecimcostatus (rodentia, microtidae). | a number of pitymys duodecimcostatus males from a natural population were treated with hydroxyurea, which produces a gap in the spermatogenic line, to study the synaptic sequence of meiotic prophase. the use of substaging criteria, based on the morphological characteristics of the meiotic cells themselves, gave rise to a classification scheme consistent with the chronological sequence revealed by hydroxyurea treatment, which supports the usefulness of these independent criteria. the characterist ... | 1991 | 2013233 |
| detection of rabbit hemorrhagic disease virus gi.2/rhdv2/b in the mediterranean pine vole ( microtus duodecimcostatus) and white-toothed shrew ( crocidura russula). | the european wild rabbit ( oryctolagus cuniculus) is a key prey species on the iberian peninsula, and several predator species that are at risk of extinction are dependent on them as prey. a new rabbit hemorrhagic disease (rhd) virus genotype (gi.2/rhdv2/b) emerged in 2010 and posed a threat to wild rabbit populations. during a survey aimed at investigating rhd epidemiology in wild rabbits, gi.2/rhdv2/b was detected by duplex real-time pcr in carcasses of one mediterranean pine vole ( microtus d ... | 2019 | 30226801 |
| energetics and thermal adaptation in semifossorial pine-voles microtus lusitanicus and microtus duodecimcostatus. | rodents colonising subterranean environments have developed several morphological, physiological and behaviour traits that promote the success of individuals in such demanding conditions. resting metabolic rate, thermoregulation capacity and daily energy expenditure were analysed in two semi-fossorial pine-vole species microtus lusitanicus and microtus duodecimcostatus inhabiting distinct areas of the iberian peninsula. individuals capture location varied in habitat and soil features, allowing t ... | 2019 | 30719532 |