Food preferences of wild house-mice Mus musclus L. The relative acceptance of various plain foods by wild house-mice Mus musculus L. The most favoured food was found to be whole canary seed Phalaris canariensis. Pinhead oatmeal and wheat were also comparatively well accepted. Glycerine, corn oil, arachis oil and mineral oil were more palatable than either olive, linseed or cod-liver oils.
The of the choice tests are considered in relation to the use of poison baits for the control of free-living mice.
Food preferences of wild house-mice Mus musculus L. An attempt was made to determine the role of the Y chromosome in the development of aggression in wild house mice. The aggression-eliciting property of testosterone depends not only on circulating adult testosterone, but also on perinatal sensitization of the central nervous system to this steroid.
Adaptive evolution and effective population size in wild house mice. Phifer-Rixey, M. Effects of social stress and intrauterine position on sexual phenotype in wild -type house mice Mus musculus.
Wild -type house mice were used to test the effect of intrauterine position Indian fuck neculai fleva anogenital distance AGD and to verify whether crowding stress would masculinize female pups, developing at all intrauterine positions, as has been demonstrated in CF-1 mice stressed by restraint, heat, and Characterizing variation in the rate of recombination across the genome is important for understanding several evolutionary processes.
analysis of the recombination landscape in laboratory mice has revealed that the different subspecies have different suites of recombination hotspots. It is unknown, however, whether hotspots identified in laboratory strains reflect the hotspot diversity of natural populations or whether broad-scale variation in the rate of recombination is conserved between subspecies. In this study, we constructed fine-scale recombination rate maps for a natural population of the Eastern house mouse, Mus musculus castaneus We performed simulations to assess the accuracy of recombination rate inference in the presence of phase errors, and we used a novel approach to quantify phase error.
The spatial distribution of recombination events is strongly positively correlated between our castaneus map, and a map constructed using inbred lines derived predominantly from M. Finally, we also find that genetic diversity in M. Our study suggests that recombination rate variation is conserved at broad scales between house mouse subspecies, but it is not strongly conserved at fine scales.
Female nursing partner choice in a population of wild house mice Mus musculus domesticus. Communal nursing in house mice is an example of cooperation where females pool litters in the same nest and indiscriminately nurse own and other offspring despite potential exploitation. The direct fitness benefits associated with communal nursing Indian fuck neculai fleva in laboratory studies suggest it to be a selected component of female house mice reproductive behaviour. However, past studies on communal nursing in free-living populations have debated whether it is a consequence of sharing the same nest or an active choice.
Here using data from a long-term study of free-living, wild house mice we investigated individual nursing decisions and determined what factors influenced a female's decision to nurse communally. Females chose to nurse solitarily more often than expected by chance, but the likelihood of nursing solitarily decreased when females had more partners available. While finding no influence of pairwise relatedness on partner choice, we observed that females shared their social environment with genetically similar individuals, suggesting a female's home area consisted of Indian fuck neculai fleva females, possibly facilitating the evolution of cooperation.
Within such a home area females were more likely to nest communally when the general relatedness of her available options was relatively high.
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Females formed communal nests with females that were familiar through associations and had young pups of usually less than 5 days old. Our findings suggest that communal nursing was not a by-product of sharing the same nesting sites, but females choose communal nursing partners from a group of genetically similar females, and ultimately the decision may then depend on the pool of options available.
Social partner choice proved to be an integrated part of cooperation among females, and might allow females to reduce the conflict over of offspring in a communal nest and milk investment towards own and other offspring. We suggest that social partner choice may be a general. Y chromosomal and sex Indian fuck neculai fleva on the behavioral stress response in the defensive burying test in wild house mice.
Genetically selected short attack latency SAL and long attack latency LAL male wild house mice behave differently in the defensive burying test. When challenged, SAL males respond actively with more time spent on defensive burying, whereas LAL males are more passive with more time remaining. Differences in basal and stress-induced HPA regulation of wild house mice selected for high and low aggression. Male wild house miceselected for short SAL and long LAL attack latency, show distinctly different behavioral strategies in coping with environmental challenges. In this study, we tested the Indian fuck neculai fleva that this difference in coping style is associated with a differential stress responsiveness.
No postnatal maternal effect on male aggressiveness in wild -derived strains of house mice. Behavioral profiles of genetically selected aggressive and nonaggressive male wild house mice in two anxiety tests.
Artificially selected aggressive SAL and non-aggressive LAL male house mice were tested in a hexagonal tunnel maze and light-dark preference LD box to determine if the bidirectional selection for aggressive behavior le to a coselection for different levels of trait anxiety.
The tunnel maze. Male meiosis and gametogenesis in wild house mice Mus musculus domesticus from a chromosomal hybrid zone; a comparison between "simple" Robertsonian heterozygotes and homozygotes. At pachytene, this trivalent usually had a single side arm at the position of the centromeres, as a result of nonhomologous pairing of the acrocentrics. This side arm persisted into diplotene.
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Generally only a single chiasma was formed between each acrocentric and the metacentric. Anaphase I nondisjunction frequencies were estimated as 1. Our concur with studies which indicate that single Robertsonian heterozygotes in wild house mice have near-normal fertility. The effect of multiple simple Robertsonian heterozygosity on chromosome pairing and fertility of wild -stock house mice Mus musculus domesticus.
The influence of Robertsonian Rb heterozygosity on fertility has been the subject of much study in the house mouse. However, these studies have been largely directed at single simple heterozygotes heterozygous for a single Rb metacentric or complex heterozygotes heterozygous for several to many metacentrics which share common chromosome arms. In this paper we describe studies on Indian fuck neculai fleva multiple simple heterozygotes, specifically the F 1 products of crosses between wild -stock mice homozygous for four or seven metacentrics and wild -stock mice with a standard all-acrocentric karyotype; these F 1 products were characterized by four and seven trivalents at meiosis I, respectively.
Mice with the same karyotype, but two different genetic backgrounds were examined. Although a range of meiotic and fertility studies were conducted, particular emphasis was paid to analysis of chromosome pairing, ly not well-described in multiple simple heterozygous mice. The progression of spermatocytes through prophase I was followed by electron microscopy of surface spread material. As ly shown for single simple Rb heterozygotes, the trivalents that characterize multiple simple heterozygotes initially showed delayed pairing of the centromeric region and later showed side arm formation, resulting from non-homologous pairing by the centromeric ends of the acrocentric chromosomes.
The greater level of pachytene irregularity unpairing and pairing abnormalities in seven versus four trivalent heterozygotes was mirrored in terms. Infectious disease outbreaks can be devastating because of their sudden occurrence, as well as the complexity of monitoring and controlling them.
Outbreaks in wildlife are even more challenging to observe and describe, especially when small animals or secretive species are involved. Modeling such infectious disease events is relevant to investigating their dynamics and is critical for decision makers to accomplish outbreak management. Tularemia, caused by the bacterium Francisella tularensis, is a potentially lethal zoonosis.
Of the few animal outbreaks that have been reported in the literature, only those affecting zoo animals have been closely monitored. Here, we report the first estimation of the basic reproduction R0 of an outbreak in wildlife caused by F.
We applied that model to data collected during an extensive investigation of an outbreak of tularemia caused by F. Based on our model and assumptions, the best estimated basic reproduction R0 of the current outbreak is 1. Our suggest that tularemia can cause severe outbreaks in small rodents. We also concluded that the outbreak self-exhausted in approximately three months without administrating Indian fuck neculai fleva. Directory of Open Access Journals Sweden. Full Text Available Infectious disease outbreaks can be devastating because of their sudden occurrence, as well as the complexity of monitoring and controlling them.
Linkage disequilibrium in wild mice. Full Text Available Crosses between laboratory strains of mice provide a powerful way of detecting quantitative trait loci for complex traits related to human disease. Hundreds of these loci have been detected, but only a small of the underlying causative genes have been identified. The main difficulty is the extensive linkage disequilibrium LD in intercross progeny and the slow process of fine-scale mapping by traditional methods.
Recently, new approaches have been introduced, such as association studies with inbred lines and multigenerational crosses. These approaches are very useful for interval reduction, but generally do not provide single-gene resolution because of strong LD extending over Indian fuck neculai fleva to several megabases. Here, we investigate the genetic structure of a natural population of mice in Arizona to determine its suitability for fine-scale LD mapping and association studies. There are three main findings: 1 Arizona mice have a high level of genetic variation, which includes a large fraction of the sequence variation present in classical strains of laboratory mice ; 2 they show clear evidence of local inbreeding but appear to lack stable population structure across the study area; and 3 LD decays with distance at a rate similar to human populations, which is considerably more rapid than in laboratory populations of mice.
Strong associations in Arizona mice are limited primarily to markers less than kb apart, which provides the possibility of fine-scale association mapping at the level of one or a few genes. Although other considerations, such as sample size requirements and marker discovery, are serious issues in the implementation of association studies, the genetic variation and LD indicate that wild mice could provide a useful tool for identifying genes that cause variation in complex traits.
Heavy metals in wild house mice from coal-mining areas of Colombia and expression Indian fuck neculai fleva genes related to oxidative stress, DNA damage and exposure to metals. Coal mining is a source of pollutants that impact on environmental and human health.
This study examined the metal content and the transcriptional status of gene markers associated with oxidative stress, metal transport and DNA damage in livers of feral mice collected near coal-mining operations, in comparison with mice obtained from a reference site. Mus musculus specimens were caught from La Loma and La Jagua, two coal-mining sites in the north of Colombia, as well as from Valledupar Cesar Departmenta city located km north of the mines.