| [comparative nuclear volumetric investigation in cricetus cricetus, cricetulus barabensis griseus & the presumably tetraploid mesocricetus auratus (gold hamster)]. | | 1958 | 13558423 |
| phylogeography of trichuris populations isolated from different cricetidae rodents. | the phylogeography of trichuris populations (nematoda) collected from cricetidae rodents (muroidea) from different geographical regions was studied. ribosomal dna (internal transcribed spacers 1 and 2, and mitochondrial dna (cytochrome c- oxidase subunit 1 partial gene) have been used as molecular markers. the nuclear internal transcribed spacers (itss) 1 and 2 showed 2 clear-cut geographical and genetic lineages: one of the nearctic region (oregon), although the second was widespread throughout ... | 2012 | 22906769 |
| plasticity in energy budget and behavior in swiss mice and striped hamsters under stochastic food deprivation and refeeding. | plasticity is employed to match environmental variability in many animal species, and consequently increases their performance under different environmental conditions. plasticity in body mass, energy budget, behavioral patterns and gastrointestinal (gi) tract was examined in swiss mice and striped hamsters (cricetulus barabensis) acclimated to a stochastic food deprivation (fd) and then an ad libitum refeeding (re). fd leaded to a significant decrease in body mass on fd days and an increase in ... | 2009 | 19447188 |
| [study on the epidemiological characteristics of hemorrhagic fever with renal syndrome in inner mongolia]. | in order to better understand the epidemiological features of hantviruses in inner mongolia. | 2007 | 18396665 |
| [investigation on rodents' natural infection of orientia tsutsugamushi in some areas of inner mongolia and xinjiang, china]. | to investigate rodents' natural infection of orientia tsutsugamushi (ot) in some areas of inner mongolia and xinjiang, china. | 2006 | 17152505 |
| [a new species of myobiid mite radfordia cricetuliphila sp. n. (acari: myobiidae) from the striped hamster cricetulus barabensis (rodentia: cricetidae) from buryatia]. | | 1999 | 10798957 |
| discovery and study of leishmania turanica for the first time in china. | reported are the results of multidisciplinary studies on leishmania turanica, which was isolated from the auricular tissues of naturally infected great gerbils in xinjiang, china. discussed are the biology of the parasite, its molecular biology, its pathogenicity in rodents and humans and its vectors. this was the first time that l. turanica had been reported in china. l. turanica is highly pathogenic in balb/c mice, with the resulting systemic infection being lethal, and it causes dermal lesion ... | 1995 | 8846493 |
| [studies on the effect of deltamethrin bath treatment of hamsters infected with leishmania donovani for interrupting kala-azar transmission]. | phlebotomus chinensis were fed respectively on two groups of cricetulus barabensis infected with leishmania donovani, of which one group had received deltamethrin bath and the other was not treated with insecticide bath. the results showed that all the sandflies in the former group died within 24 hours, while those in the latter group had a high survival rate. among the 165 sandflies examined, 114 (69.1%) became infected. the promastigotes not only developed well in the midgut, but also invaded ... | 1994 | 7720208 |
| [characteristics of the distribution of dna repetitive sequences in the sex chromosomes of 4 species of rodent]. | four rodent species with very large heterochromatic regions on the sex chromosomes have been studied using in situ dna/dna hybridization techniques. repetitious dna fractions were obtained at c0t 0-0.01. heterochromatic regions of x and x chromosomes of cricetulus barabensis and phodopus sungorus, and the heterochromatic long arm of the y chromosome of mesocricetus auratus do not contain disproportionately high amounts of repeated dna sequences. heterochromatic regions on sex chromosomes of micr ... | 1985 | 3911513 |
| isolation and characterization of microsatellite markers in the striped hamster (cricetulus barabensis). | a total of 14 polymorphic microsatellite markers were isolated and characterized from the striped hamster, cricetulus barabensis, a widespread rodent pest in northern china. two to six alleles per locus were detected in 90 individuals from three locations in shandong province, china. the observed and expected heterozygosities ranged from 0.21 to 0.78 and from 0.30 to 0.80, respectively. these microsatellite markers provide new tools for investigating the population structure of this species. | 2008 | 21586088 |
| limits to sustainable energy budget during lactation in the striped hamster (cricetulus barabensis) raising litters of different size. | a female animal appears to approach an upper limit to the rate of sustained energy intake/metabolic rate (susei/mr) during lactation. however, different species of animals may respond differently to the sustainable limit. here, we measured energy budget during lactation in female striped hamsters raising litters of natural size (con), and females whose litter size was manipulated during early lactation to support fewer or more pups (minus pups, mp or plus pups, pp). the striped hamsters signific ... | 2010 | 20800461 |
| energy budget during four successive bouts of lactation in striped hamsters exposed to decreases in ambient temperature. | a prediction of the seasonal investment hypothesis is that overall energy investment needs to be greater for young being produced at colder temperatures. then, that energy cost is lower as temperature becomes warmer. to evaluate this assumption, i performed a series of measures of food intake and reproductive output throughout four successive bouts of lactation in striped hamsters (cricetulus barabensis) exposed to a constant warm temperature (warm, 21°c) or exposed to consecutive decreases in a ... | 2011 | 21699991 |
| [karyotypes divergence in superspecies complex cricetulus barabensis sensu lato and their interrelationships in natural contact zones]. | interrelationships between three chromosomal forms of striped hamsters belonging to the superspecies complex cricetulus barabensis sensu lato (cricetidae, rodentia), namely 'barabensis', 'pseudogriseus', and 'griseus', are examined from the standpoint of different biological/genetic species concepts. craniometric data suggest that differences between the karyotypes are rather of subspecies level. cytogenetic differences between the karyotypes are also not great and correspond to the level of chr ... | 2012 | 22834165 |
| agricultural irrigation mediates climatic effects and density dependence in population dynamics of chinese striped hamster in north china plain. | several studies show that climatic (extrinsic) factors can interact with density-dependent (intrinsic) factors to alter long-term population dynamics, yet there is a surprising lack of investigations of how anthropogenic disturbance modifies such dynamics. such interactions could be especially important in agricultural systems subject to climate change. we investigated the effects of density dependence, climate, recurrent disturbance from flood irrigation and their interactions on the population ... | 2013 | 23030597 |
| species differences in the immunoreactive expression of oxytocin, vasopressin, tyrosine hydroxylase and estrogen receptor alpha in the brain of mongolian gerbils (meriones unguiculatus) and chinese striped hamsters (cricetulus barabensis). | species differences in neurochemical expression and activity in the brain may play an important role in species-specific patterns of social behavior. in the present study, we used immunoreactive (ir) labeling to compare the regional density of cells containing oxytocin (ot), vasopressin (avp), tyrosine hydroxylase (th), or estrogen receptor alpha (erα) staining in the brains of social mongolian gerbils (meriones unguiculatus) and solitary chinese striped hamsters (cricetulus barabensis). multipl ... | 2013 | 23762431 |
| decreased circulating leptin and increased neuropeptide y gene expression are implicated in food deprivation-induced hyperactivity in striped hamsters, cricetulus barabensis. | physiological and behavioral adjustments of small mammals are important strategies in response to variations in food availability. although numerous of studies have been carried out in rodents, behavioral patterns in response to food deprivation and re-feeding (fd-rf) are still inconsistent. here we examined effects of a 24h fd followed by rf on general activity, serum leptin concentrations and gene expression of orexigenic and anorexigenic hypothalamic neuropeptides in striped hamsters (cricetu ... | 2014 | 24631583 |
| effect of rfrp-3 on reproduction is sex- and developmental status-dependent in the striped hamster (cricetulus barabensis). | rfamide-related peptides (rfrps) are orthologous to gonadotropin-inhibitory hormone (gnih) inhibiting gonadotropin release. there are only two rfrp sequences (rfrp-1 and rfrp-3) encoded in rodents. rfrp-3, which was considered as a hypothetical inhibitor on gnrh, shows a stimulatory effect on the male syrian and male siberian hamster in short days. as a dominant rodent pest in northern china farmland, the striped hamster (cricetulus barabensis) has higher reproductive activities and could act as ... | 2014 | 24973765 |
| correlations between phytohemagglutinin response and leukocyte profile, and bactericidal capacity in a wild rodent. | phytohemagglutinin (pha)-induced swelling is widely used to investigate cell-mediated and innate immunity across different vertebrate taxa. however, its physiological mechanism is still an open question due to the complexity of the involved immune components. in the present study, we measured the synchronous variations of pha response, the proportion of different subtypes of leukocytes, as well as serum bactericidal capacity in circulation blood at 6, 12 and 24 h after pha versus pbs injection i ... | 2015 | 25827605 |
| description and phylogenetic affinities of two new species of nomadolepis (eucestoda, hymenolepididae) from eastern palearctic. | two new species of hymenolepidid cestodes belonging to the genus nomadolepis are described from small mammals in western siberia and the far east, russian federation. nomadolepis fareasta n. sp. is described from the striped dwarf hamster cricetulus barabensis in amurskaya oblast' and nomadolepis shiloi n. sp. is described from the eurasian harvest mouse micromys minutus from novosibirskaya oblast' and amurskaya oblast'. nomadolepis fareasta n. sp. differs from nomadolepis merionis, nomadolepis ... | 2015 | 26123997 |
| food restriction attenuates oxidative stress in brown adipose tissue of striped hamsters acclimated to a warm temperature. | it has been suggested that the up-regulation of uncoupling proteins (ucps) decreases reactive oxygen species (ros) production, in which case there should be a negative relationship between ucps expression and ros levels. in this study, the effects of temperature and food restriction on ros levels and metabolic rate, ucp1 mrna expression and antioxidant levels were examined in the brown adipose tissue (bat) of the striped hamsters (cricetulus barabensis). the metabolic rate and food intake of ham ... | 2016 | 27157336 |
| seasonal differential expression of kiss-1/gpr54 in the striped hamsters (cricetulus barabensis) among different tissues. | kisspeptins and g protein coupled receptor (gpr54) play significant roles in regulating reproductive activity among seasonal reproductive animals; however, the mechanisms of kiss-1 and gpr54 gene affecting the seasonal reproduction in striped hamster are still unknown. in this study, real-time quantitative pcr was employed to examine the expression profiles of kiss-1 and gpr54 in the hypothalamus, ovarian, testis, uterus and epididymis of striped hamsters among four different seasons. our result ... | 2016 | 27580229 |
| photoperiod and temperature differently affect immune function in striped hamsters (cricetulus barabensis). | small mammals generally use short day length to elevate immune function to counteract the immunosuppressive effect of low temperature in winter in light of the winter immunoenhancement hypothesis. in the present study, we tested this hypothesis in striped hamsters (cricetulus barabensis). we expected that immune responses would be increased by short photoperiod but suppressed by low temperature. thirty-four adult female hamsters were randomly divided into the long day (16l:8d) and short day (8l: ... | 2017 | 27956167 |
| the strategies of behavior, energetic and thermogenesis of striped hamsters in response to food deprivation. | the life history of many animals includes periods of food shortage. two behavioral strategies are involved in small mammals in response to food shortage: an increase in activity behavior, representing the increased foraging or migratory behavior, and a decrease in activity level, serving as a mechanism for conserving energy. however, it is uncertain whether animals adopt both strategies in response to food shortage, and whether hormone and neuroendocrine mechamisms are involved in both strategie ... | 2017 | 28261997 |
| effect of temperature and food restriction on immune function in striped hamsters (cricetulus barabensis). | small mammals in the temperate area face seasonal fluctuations of temperature and food availability, both of which may influence their immune responses being critical to the survival. in the present study, we tested the hypothesis that low temperature and food restriction would suppress immune function in striped hamsters (cricetulus barabensis). thirty-seven adult male hamsters were randomly assigned into the warm (23±1°c) and the cold (5±1°c) groups, which were further divided into the fed and ... | 2017 | 28381582 |
| demodex sinocricetuli: new species of hair follicle mite (acari:demodecidae) from the chinese form of the striped hamster, cricetulus barabensis (rodentia:muridae). | demodex sinocricetuli sp. nov. is described in all its life stages from the chinese form of the striped hamster, cricetulus barabensis. a large sample size of > 11,500 mites (96% adults and only 4% ova and immatures) was surveyed. the cause of the apparent reproductive stasis is not known. limited data sets from other demodecid species reveal populations that are 42-82% adult. | 1997 | 9151497 |
| identification and characterization of a novel rodent bocavirus from different rodent species in china. | members in the genus bocaparvovirus are closely related to human health and have a wide host range. the diverse hosts raise the possibility of crossing species barrier, which is a feature of emerging viruses. among the mammalian hosts, rodents are generally acknowledged to be important reservoirs of emerging viruses. here, rodent samples collected from six provinces and autonomous regions of china (liaoning, inner mongolia, tibet, xinjiang, guangxi and yunnan) were used to investigate the preval ... | 2018 | 29593218 |
| photoperiod affects harderian gland morphology and secretion in female cricetulus barabensis: autophagy, apoptosis, and mitochondria. | photoperiod is an important factor of mammalian seasonal rhythm. the harderian gland (hg) appears to act as a "standby" structure of the retinal-pineal axis, mediating light signals in vitro and neuroendocrine regulation in vivo; however, the effect of photoperiod on the hg is not clear. here, we studied morphological differences in the hg of female striped dwarf hamsters (cricetulus barabensis), a small mammal that experiences an annual rhythm, under different photoperiods (i.e., sp, short phot ... | 2020 | 32435203 |
| the responses of metabolic rate and neuropeptides to food deprivation in striped hamsters (cricetulus barabensis) with different basal metabolic rate. | high basal metabolic rate (bmr) is related to a powerful metabolic engine even under food shortage, which can lead to high levels of daily energy expenditure and requires more energy for maintenance in small mammals. to test the hypothesis that animals with different bmr levels respond differently to food shortage, we compared the changes in metabolism, morphology, and gene expression in response to food deprivation (fd) in male-striped hamsters (cricetulus barabensis) with low (l)- or high (h)- ... | 2020 | 32314557 |
| season and sex have different effects on hematology and cytokines in striped hamsters (cricetulus barabensis). | animals in the temperate zones face seasonal variations in environments and hence their immune responses change seasonally. in the current study, seasonal changes in hematological parameters and cytokines in striped hamsters (cricetulus barabensis) were examined to test the winter immunoenhancement hypothesis, which states that immune function tends to increase in fall and winter compared with other seasons. male and female hamsters were captured from the wild in the fall and winter of 2014 and ... | 2020 | 31732779 |
| effects of thyroid hormones and cold acclimation on the energy metabolism of the striped hamster (cricetulus barabensis). | to examine the effects of low ambient temperature and thyroid hormones on the energy metabolism of the striped hamster (cricetulus barabensis), adult male striped hamsters were kept at 30 °c, or acclimated to 5 °c, for 4 weeks. during this time, hamsters were treated with a synthetic thyroxine, levothyroxine sodium (lts), the antithyroid drug methimazole, or saline solution (control). hamster's food intake, basal metabolic rate (bmr), non-shivering thermogenesis (nst), thyroid hormones, body fat ... | 2019 | 30603846 |
| seasonal variations in cellular and humoral immunity in male striped hamsters (cricetulus barabensis). | animals in the non-tropical zone usually demonstrate seasonal variations in immune function, which is important for their survival. in the present study, seasonal changes in immunity in striped hamsters (cricetulus barabensis) were investigated to test the winter immunoenhancement hypothesis. male hamsters were captured from the wild in the fall and winter of 2014 and in the spring and summer of 2015. body mass, body fat mass and blood glucose levels of the hamsters were all highest in the summe ... | 2018 | 30404899 |
| variation of food availability affects male striped hamsters (cricetulus barabensis) with different levels of metabolic rate. | in the present study, we examined metabolic, morphological and neurochemical changes in male striped hamsters (cricetulus barabensis) in response to variations in food availability. males with low and high levels of metabolic rate (mr: l-mr and h-mr, respectively), defined by their activity mr, were compared. in experiment 1, 36-h food deprivation was found to significantly decrease mr levels, body fat content, mass of small and large intestines, and leptin gene expression in the white adipose t ... | 2018 | 29851239 |
| effect of temperature on oxidative stress, antioxidant levels and uncoupling protein expression in striped hamsters. | according to the rate of living-free radical hypothesis, higher metabolic rates should increase reactive oxygen species (ros) production. however, the "uncoupling to survive" hypothesis postulates that uncoupling proteins (ucps) can decrease ros production by lowering the potential of the inner mitochondrial membrane, in which case the correlation between metabolic rate and ros levels would be a negative rather than positive. in this study, we examined energy intake, oxidative stress levels, ant ... | 2015 | 26244518 |
| plasticity in gastrointestinal morphology and enzyme activity in lactating striped hamsters (cricetulus barabensis). | in small mammals, marked phenotypic plasticity of digestive physiology has been shown to make it easier for them to cope with energetically stressful periods, such as lactation. it has been proposed that the capacity of the gut to digest and absorb food is not the limiting factor to sustained energy intake (susei) during peak lactation. in this study, plasticity in energy intake and gastrointestinal morphology was examined in striped hamsters at different stages of reproduction and when raising ... | 2016 | 26944487 |
| [microsatellite loci variation and investigation of gene flow between two karyoforms of cricetulus barabensis sensu lato (rodentia, cricetidae)]. | we examine the diversity of six microsatellite loci and partial rag1 exon of “barabensis” and “pseudogriseus” karyoforms in cricetulus barabensis sensu lato species complex. a total of 435 specimens from 68 localities ranging from altai to the far east are investigated. the results of the population structure analysis (factor analysis and nj tree based on nei genetic distances) support subdivision into two well-differentiated clusters corresponding to the two karyoforms. these karyoforms are als ... | 2017 | 29372805 |
| karyotype evolution and phylogenetic relationships of cricetulus sokolovi orlov et malygin 1988 (cricetidae, rodentia) inferred from chromosomal painting and molecular data. | sokolov's dwarf hamster (cricetulus sokolovi) is the least studied representative of the striped hamsters (cricetulus barabensis species group), the taxonomy of which remains controversial. the species was described based on chromosome morphology, but neither the details of the karyotype nor the phylogenetic relationships with other cricetulus are known. in the present study, the karyotype of c. sokolovi was examined using cross-species chromosome painting. molecular and cytogenetic data were em ... | 2017 | 28719894 |
| late lactation in small mammals is a critically sensitive window of vulnerability to elevated ambient temperature. | predicted increases in global average temperature are physiologically trivial for most endotherms. however, heat waves will also increase in both frequency and severity, and these will be physiologically more important. lactating small mammals are hypothesized to be limited by heat dissipation capacity, suggesting high temperatures may adversely impact lactation performance. we measured reproductive performance of mice and striped hamsters (cricetulus barabensis), including milk energy output (m ... | 2020 | 32929014 |
| effects of photoperiod on morphology and function in testis and epididymis of cricetulus barabensis. | photoperiod regulates the seasonal reproductive rhythms of mammals by influencing the development and function of sexual organs; however, the underlying mechanism remains unclear. we examined the morphology and functioning of the main sex organs of striped dwarf hamsters (cricetulus barabensis) under different photoperiods (short daylight [sd], moderate daylight [md], and long daylight [ld]) and further investigated the underlying molecular mechanisms. there was an inverse correlation between bl ... | 2020 | 32743820 |
| the energy budget and fat accumulation in striped hamsters (cricetulus barabensis) during post-lactation. | adaptive adjustments of energy intake and body fat play an important role in allowing animals' to meet the energy demands of thermoregulation during cold conditions and reproduction. body fat is usually metabolized during lactation, which is one of the most energetically demanding activities of female mammals, however the effect of this on the energy budget and body fat regulation after lactation remains unclear. we compared the energy intake and body fat of female striped hamsters (cricetulus b ... | 2020 | 32673739 |
| the ability to dissipate heat is likely to be a more important limitation on lactation in striped hamsters with greater reproductive efforts under warmer conditions. | the limitations on energy availability and outputs have been implied to have a profound effect on the evolution of many morphological and behavioral traits. it has been suggested that the reproductive performance of mammals is frequently constrained by intrinsic physiological factors, such as the capacity of the mammary glands to produce milk (the peripheral limitation [pl] hypothesis) or that of the body to dissipate heat (the heat dissipation limitation [hdl] hypothesis). research on a variety ... | 2020 | 32484722 |