| occurrence of hantavirus within the rodent population of northeastern california and nevada. | these studies were initiated to determine the prevalence and hosts of hantaviruses within the rodent population of nevada and northeastern california. a total of 1,867 rodents were collected, sexed, weighed, identified, and tested by enzyme-linked immunosorbent assay for the presence of antibody against hantavirus nucleocapsid. the primary hosts for hantaviruses in this region were found within the family muridae (peromyscus maniculatus. reithrodontomys megalotis. and microtus montanus). studies ... | 1996 | 8619434 |
| seroepidemiologic studies of hantavirus infection among wild rodents in california. | a total of 4,626 mammals were serologically tested for antibodies to sin nombre virus. all nonrodent species were antibody negative. among wild rodents, antibody prevalence was 8.5% in murids, 1.4% in heteromyids, and < 0.1% in sciurids. of 1,921 peromyscus maniculatus (deer mice), 226 (11.8%) were antibody positive, including one collected in 1975. the highest antibody prevalence (71.4% of 35) was found among p. maniculatus on santa cruz island, off the southern california coast. prevalence of ... | 1997 | 9204301 |
| ecology and demographics of hantavirus infections in rodent populations in the walker river basin of nevada and california. | to study the ecologic correlates of hantavirus in deer mice (peromyscus maniculatus), we sampled 114 sites in the walker river basin of nevada and california in 1995-1996. blood samples were tested for antibody to hantavirus, and a subset of samples was also tested for virus rna by reverse transcription-polymerase chain reaction. average prevalence of antibody-positive mice was 17%, with heavier males the most likely to be infected. antibody prevalence varied within repeatedly sampled sites from ... | 1998 | 9749642 |
| remote sensing and geographic information systems: charting sin nombre virus infections in deer mice. | we tested environmental data from remote sensing and geographic information system maps as indicators of sin nombre virus (snv) infections in deer mouse (peromyscus maniculatus) populations in the walker river basin, nevada and california. we determined by serologic testing the presence of snv infections in deer mice from 144 field sites. we used remote sensing and geographic information systems data to characterize the vegetation type and density, elevation, slope, and hydrologic features of ea ... | 2000 | 10827114 |
| forest rodents provide directed dispersal of jeffrey pine seeds. | some species of animals provide directed dispersal of plant seeds by transporting them nonrandomly to microsites where their chances of producing healthy seedlings are enhanced. we investigated whether this mutualistic interaction occurs between granivorous rodents and jeffrey pine (pinus jeffreyi) in the eastern sierra nevada by comparing the effectiveness of random abiotic seed dispersal with the dispersal performed by four species of rodents: deer mice (peromyscus maniculatus), yellow-pine an ... | 2009 | 19341138 |
| isotopic niche variation from the holocene to today reveals minimal partitioning and individualistic dynamics among four sympatric desert mice. | species interact with each other and their environment over a range of temporal scales, yet our understanding of resource partitioning and the mechanisms of species coexistence is largely restricted to modern time-scales of years to decades. furthermore, the relative magnitudes of inter- vs. intraspecific variation in resource use are rarely considered, despite the potential for the latter to influence a species' ability to cope with changing environmental conditions. modern desert rodent commun ... | 2018 | 29048750 |
| cranial morphological variation in peromyscus maniculatus over nearly a century of environmental change in three areas of california. | determining how species respond to prolonged environmental change is critical to understanding both their evolutionary biology and their conservation needs. in general, organisms can respond to changing environmental conditions by moving, by adapting in situ, or by going locally or globally extinct. morphological changes, whether plastic or adaptive, are one way that species may respond in situ to local environmental change. because cranial morphology is influenced by selective pressures arising ... | 2016 | 26511596 |