| lyme disease borrelia spp. in ticks and rodents from northwestern china. | in may 1999, field surveys of lyme disease spirochetes were conducted around the tianshan mountains in xinjiang uygur autonomous region in northwestern people's republic of china. ixodes persulcatus ticks were obtained in a tianchi lake valley with primary forest, while the tick fauna was poor in the semidesert or at higher altitudes in this region. species identities were confirmed by molecular analysis in which an internal transcribed spacer sequence was used. of 55 adult ticks, 22 (40%) were ... | 2001 | 11679340 |
| molecular epidemiological study for tick-borne disease (ehrlichia and anaplasma spp.) surveillance at selected u.s. military training sites/installations in korea. | vector-borne diseases are a potential public health threat to u.s. forces korea (usfk). ehrlichia and anaplasma spp., transmitted by ticks, are only two of several diseases that may affect military readiness and operations. rodents were collected at selected u.s. military installations and training sites in the republic of korea. dna was extracted from spleen tissues and assayed by pcr methods for ehrlichia and anaplasma species. from rodents and mustelids collected during 1999 and 2000, a total ... | 2003 | 12860612 |
| mitochondrial genome of cricetulus migratorius (rodentia: cricetidae): insights into the characteristics of the mitochondrial genome and the phylogenetic relationships of cricetulus species. | cricetulus migratorius is widely distributed in the northwestern arid regions of china. here, the complete mitochondrial genome (mitogenome) of c. migratorius is reported, to our knowledge, for the first time. it was found to be 16,246bp in length, including 13 protein-coding genes (pcgs), 2 rrna genes, 22 trna genes, and one control region, and showed characteristics typical of the vertebrate mitogenome. comparative analyses of mitogenomes of cricetulus species showed that hamster mitogenomes h ... | 2016 | 27717890 |
| the complete mitochondrial genome of lesser long-tailed hamster cricetulus longicaudatus (milne-edwards, 1867) and phylogenetic implications. | the complete mitochondrial genome sequence of cricetulus longicaudatus (rodentia cricetidae: cricetinae) was determined and was deposited in genbank (genbank accession no. km067270). the mitochondrial genome of c. longicaudatus was 16,302 bp in length and contained 13 protein-coding genes, 2 ribosomal rna (rrna) genes, 22 transfer rna (trna) genes and one control region, with an identical order to that of other rodents' mitochondrial genomes. the phylogenetic analysis was performed with bayesian ... | 2016 | 25090399 |
| past climate change and recent anthropogenic activities affect genetic structure and population demography of the greater long-tailed hamster in northern china. | the genetic diversity and the spatial structure of a species are likely consequences of both past and recent evolutionary processes, but relevant studies are still rare in east asia where the pleistocene climate has unique influences. in this study, we examined the impact of past climate change and recent anthropogenic activities on the genetic structure and population size of the greater long-tailed hamster (tscherskia triton), an agricultural rodent pest species in northern china. dna sequence ... | 2015 | 26202859 |
| geographic distance affects dispersal of the patchy distributed greater long-tailed hamster (tscherskia triton). | dispersal is a fundamental process in ecology influencing the genetic structure and the viability of populations. understanding how variable factors influence the dispersal of the population is becoming an important question in animal ecology. to date, geographic distance and geographic barriers are often considered as main factors impacting dispersal, but their effects are variable depending on different conditions. in general, geographic barriers affect more significantly than geographic dista ... | 2014 | 24911266 |
| social defeat and subsequent isolation housing affect behavior as well as cell proliferation and cell survival in the brains of male greater long-tailed hamsters. | aversive social interactions, such as social defeat, can alter a variety of behavioral and cognitive functions. in the present study, we examined the effects of social defeat and the subsequent housing on behavior as well as cell proliferation and cell survival in the solitary, male greater long-tailed hamster (tscheskia triton). we found that three days of agonistic interactions reliably led to a subordinate-dominant relationship between pairs of male hamsters. however, such behavioral interact ... | 2014 | 24508746 |
| variation of genetic diversity in a rapidly expanding population of the greater long-tailed hamster (tscherskia triton) as revealed by microsatellites. | genetic diversity is essential for persistence of animal populations over both the short- and long-term. previous studies suggest that genetic diversity may decrease with population decline due to genetic drift or inbreeding of small populations. for oscillating populations, there are some studies on the relationship between population density and genetic diversity, but these studies were based on short-term observation or in low-density phases. evidence from rapidly expanding populations is lac ... | 2013 | 23349815 |
| [the polymorphism and distribution of b chromosomes in germline and somatic cells of tscherskia triton de winton (rodentia, cricetinae)]. | the karyotypes of 13 greater long-tailed hamsters (tscherskia triton de winton, 1899) (eight males and five females) from primorskii krai (russia), including six males and one female from the vicinity of the city of ussuriisk and two males and four females from the vicinity of the village of pogranichnyi, have been studied. the karyotypes of five males (four from the vicinity of ussuriisk and one from the vicinity of pogranichnyi) have been found to contain one or two small acrocentric b chromos ... | 2012 | 22830259 |
| oxytocin and vasopressin immunoreactive staining in the brains of brandt's voles (lasiopodomys brandtii) and greater long-tailed hamsters (tscherskia triton). | immunoreactive (ir) staining of the neuropeptides oxytocin (ot) and vasopressin (avp) was performed in the brains of brandt's voles (lasiopodomys brandtii) and greater long-tailed hamsters (tscherskia triton)-two species that differ remarkably in social behaviors. social brandt's voles had higher densities of ot-ir cells in the medial preoptic area (mpoa) and medial amygdala (mea) as well as higher densities of avp-ir cells in the lateral hypothalamus (lh) compared to solitary greater long-taile ... | 2010 | 20573572 |
| agonistic encounters and brain activation in dominant and subordinate male greater long-tailed hamsters. | during an agonistic encounter test, dominant male greater long-tailed hamsters (tscheskia triton) initiated attacks sooner and displayed higher levels of aggression and flank marking behavior than their subordinate counterparts. accordingly, subordinate males exhibited more defensive behavior than dominant ones. specific patterns of neuronal activation, measured by fos-immunoreactive staining (fos-ir), were found in the hamster brain following agonistic interactions. increased fos-ir was observe ... | 2010 | 20471386 |
| fecal hormone variation during prolonged social interaction in male tscheskia triton. | agonistic behavior is crucial for conspecific members to maintain a social hierarchy, optimum population density, and high fitness. it is known that agonistic behavior and social ranking often interact with hormones such as testosterone (t) and glucocorticoids (gcs). the challenge hypothesis states that t levels in males are promoted by the agonistic behaviors of other males and has been widely testified in many taxa of vertebrates, even in humans, but seldom attempted in rodents. here, we exami ... | 2009 | 19296908 |
| genetic diversity decreases as population density declines: implications of temporal variation in mitochondrial haplotype frequencies in a natural population of tscherskia triton. | although the spatial genetic differentiation that occurs in animal populations has been extensively studied, information on temporal variations in genetic structure and diversity is still lacking, especially for animals with oscillating populations. in the present study, we used the mtdna d-loop sequence to assess the temporal genetic variation in samples from six successive years for the greater long-tailed hamster, tscherskia triton. sampling was carried out between 1998 and 2003 in cropland o ... | 2006 | 21396012 |
| the flea fauna of iran. x. two new leptopsyllid fleas (siphonaptera) from the long-tailed hamster, calomyscus (cricetidae). | | 2013 | 5172487 |
| dominant and subordinate relationship formed by repeated social encounters alters gut microbiota in greater long-tailed hamsters. | social stress can dramatically influence the health of animals via communication between gut microbiota and the hpa system. however, this effect has been rarely investigated among different social ranked animals after chronic repeated social encounters. in this study, we evaluated changes and differences in microbiota among control, dominant, and subordinate male greater long-tailed hamsters (tscherskia triton) over 28 successive days of repeated social encounter. our results indicated that as c ... | 2020 | 31807860 |
| is the center of origin of long-tailed hamster cricetulus longicaudatus milne-edwards 1867 (rodentia, cricetidae) located in tibet? | first data on morphological and mitochondrial variation in the long-tailed hamster cricetulus longicaudatus is presented. in contrast to genetically monomorphic populations of mongolia and tuva, the northeastern part of the qinghai-tibetian plateau was found to harbor several divergent mtdna lineages. this pattern suggests a recent expansion of the long-tailed hamster to the northern part of its recent range, which started from tibet, presumably, in the late middle pleistocene. several populatio ... | 2018 | 29790032 |