| experimental infections by brucella suis type 4 in alaskan rodents. | the susceptibility of nine species of rodents and one species of lagomorph to brucella suis type 4 was studied experimentally. the rodent species included: guinea pig (cavia porcellus), scandinavian lemming (lemmus lemmus), brown lemming (l. sibiricus), northern red-backed vole (clethrionomys rutilis), varying lemmings (dicrostonyx stevensoni and d. rubricatus), yellow-cheeked vole (microtus xanthognathus), flying squirrel (glaucomys sabrinus) and ground squirrel (citellus parryii). the lagomorp ... | 1980 | 7463596 |
| strongyloides robustus and the northern sympatric populations of northern (glaucomys sabrinus) and southern (g. volans) flying squirrels. | within north america, northern (glaucomys sabrinus) and southern (glaucomys volans) flying squirrels occupy distinct ranges with limited overlap. sympatry in northern latitudes coincides with northern hardwood vegetation from minnesota to new england. strongyloides robustus is an intestinal parasite that infects both species but appears to be deleterious only to northern flying squirrels. as a result, s. robustus could be a critical determinant of flying squirrel population characteristics in at ... | 2004 | 15465730 |
| susceptibility of various species of rodents to the relapsing fever spirochete, borrelia hermsii. | in a study to determine susceptibility to borrelia hermsii of various rodents commonly found in or near places where human cases of relapsing fever occurred, chipmunks (eutamias amoenus), pine squirrels (tamiasciurus hudsonicus richardsoni), flying squirrels (glaucomys sabrinus), columbian ground squirrels (spermophilus columbianus columbianus), golden-mantled ground squirrels (s. lateralis tescorum), wood rats (neotoma cinerea cinerea), white-footed deer mice (peromyscus maniculatus), and meado ... | 1970 | 16557828 |
| demography of northern flying squirrels informs ecosystem management of western interior forests. | we studied northern flying squirrel (glaucomys sabrinus) demography in the eastern washington cascade range to test hypotheses about regional and local abundance patterns and to inform managers of the possible effects of fire and fuels management on flying squirrels. we quantified habitat characteristics and squirrel density, population trends, and demography in three typical forest cover types over a four-year period. we had 2034 captures of flying squirrels over 41 000 trap nights from 1997 th ... | 2006 | 16711046 |
| survey for zoonotic rickettsial pathogens in northern flying squirrels, glaucomys sabrinus, in california. | epidemic typhus, caused by rickettsia prowazekii, is maintained in a southern flying squirrel (glaucomys volans) sylvatic cycle in the southeastern united states. the northern flying squirrel (glaucomys sabrinus) has not been previously associated with r. prowazekii transmission. a second rickettsial pathogen, anaplasma phagocytophilum, infects dusky-footed woodrats (neotoma fuscipes) and tree squirrels in northern california. because northern flying squirrels or their ectoparasites have not bee ... | 2007 | 17984264 |
| differential exposure to anaplasma phagocytophilum in rodent species in northern california. | anaplasma phagocytophilum is a zoonotic tick-borne rickettsial pathogen that causes granulocytic anaplasmosis (ga) in humans, horses, and dogs. in california, dusky-footed woodrats (neotoma fuscipes) are a putative reservoir host, and ixodes pacificus is a vector for transmission from rodents to humans, dogs, and horses. cases are clustered in coastal and sierra nevada foothill regions, but not necessarily in proximity to infected woodrats. this study was designed to compare exposures and active ... | 2008 | 18047398 |
| evaluation of squirrels (rodentia: sciuridae) as ecologically significant hosts for anaplasma phagocytophilum in california. | granulocytic anaplasmosis (ga), caused by anaplasma phagocytophilum, is a potentially fatal, emerging rickettsial disease of humans, domestic animals, and wildlife. the purpose of this study was to determine whether sciurids from multiple areas of northern california were infested with ticks or exposed to or infected with a. phagocytophilum using polymerase chain reaction (pcr) and indirect-fluorescent antibody (ifa) serology. sciurids of nine different tree- and ground-dwelling species were ass ... | 2008 | 18714881 |
| coinfection of western gray squirrel (sciurus griseus) and other sciurid rodents with borrelia burgdorferi sensu stricto and anaplasma phagocytophilum in california. | overlapping geographic distributions of tick-borne disease agents utilizing the same tick vectors are common, and coinfection of humans, domestic animals, wildlife, and ticks with both borrelia burgdorferi and anaplasma phagocytophilum has been frequently reported. this study was undertaken in order to evaluate the prevalence of both b. burgdorferi sensu stricto (hereinafter referred to as b. burgdorferi) and a. phagocytophilum in several species of sciurid rodents from northern california, usa. ... | 2010 | 20090047 |
| prevalence of the bacterium coxiella burnetii in wild rodents from a canadian natural environment park. | zoonotic diseases impact both wild and domestic animal populations and can be transmitted to humans through close contact with animal species. reservoir species acting as vectors are major traffickers of disease. rodents contribute to the transmission of coxiella burnetii although little is known about its prevalence in wild animal populations. dna was extracted from genital swabs collected from woodland jumping mice, deer mice, southern red-backed voles, eastern chipmunks, north american red sq ... | 2012 | 22639912 |
| data from camera surveys identifying co-occurrence and occupancy linkages between fishers (pekania pennanti), rodent prey, mesocarnivores, and larger predators in mixed-conifer forests. | these data provide additional information relevant to the frequency of fisher detections by camera traps, and single-season occupancy and local persistence of fishers in small patches of forest habitats detailed elsewhere, "landscape fuel reduction, forest fire, and biophysical linkages to local habitat use and local persistence of fishers (pekania pennanti) in sierra nevada mixed-conifer forests" [10]. the data provides insight on camera trap detections of 3 fisher predators (bobcat [lynx rufus ... | 2016 | 26937448 |
| monoecocestus thomasi sp. n. (cestoda: anoplocephalidae) from the northern flying squirrel, glaucomys sabrinus (shaw), in oregon. | monoecocestus thomasi sp. n. (cestoda: anoplocephalidae), from the northern flying squirrel, glaucomys sabrinus (shaw), in oregon, is described and distinguished from its congeners. monoecocestus thomasi is the sixth species of monoecocestus to be described from nearctic rodents, and the first from a member of the family sciuridae. our comparisons of taxonomic characters of the nominal species of monoecocestus in north american rodents have shown that m. giganticus buhler 1970 is a synonym of m. ... | 1977 | 915607 |
| andrya sciuri n. sp., a cestode from the northern flying squirrel. | | 1947 | 20256980 |
| using dynamic n-mixture models to test cavity limitation on northern flying squirrel demographic parameters using experimental nest box supplementation. | dynamic n-mixture models have been recently developed to estimate demographic parameters of unmarked individuals while accounting for imperfect detection. we propose an application of the dail and madsen (2011: biometrics, 67, 577-587) dynamic n-mixture model in a manipulative experiment using a before-after control-impact design (baci). specifically, we tested the hypothesis of cavity limitation of a cavity specialist species, the northern flying squirrel, using nest box supplementation on half ... | 2014 | 25360258 |
| ultrasonic vocalizations emitted by flying squirrels. | anecdotal reports of ultrasound use by flying squirrels have existed for decades, yet there has been little detailed analysis of their vocalizations. here we demonstrate that two species of flying squirrel emit ultrasonic vocalizations. we recorded vocalizations from northern (glaucomys sabrinus) and southern (g. volans) flying squirrels calling in both the laboratory and at a field site in central ontario, canada. we demonstrate that flying squirrels produce ultrasonic emissions through recorde ... | 2013 | 24009728 |
| glide performance and aerodynamics of non-equilibrium glides in northern flying squirrels (glaucomys sabrinus). | gliding is an efficient form of travel found in every major group of terrestrial vertebrates. gliding is often modelled in equilibrium, where aerodynamic forces exactly balance body weight resulting in constant velocity. although the equilibrium model is relevant for long-distance gliding, such as soaring by birds, it may not be realistic for shorter distances between trees. to understand the aerodynamics of inter-tree gliding, we used direct observation and mathematical modelling. we used video ... | 2013 | 23256188 |
| quadrupedal locomotor performance in two species of arboreal squirrels: predicting energy savings of gliding. | gliding allows mammals to exploit canopy habitats of old-growth forests possibly as a means to save energy. to assess costs of quadrupedal locomotion for a gliding arboreal mammal, we used open-flow respirometry and a variable-speed treadmill to measure oxygen consumption and to calculate cost of transport, excess exercise oxygen consumption, and excess post-exercise oxygen consumption for nine northern flying squirrels (glaucomys sabrinus) and four fox squirrels (sciurus niger). our results ind ... | 2010 | 20361193 |
| the potential role of strongyloides robustus on parasite-mediated competition between two species of flying squirrels (glaucomys). | there is growing evidence that populations of the northern flying squirrel (glaucomys sabrinus) are declining in the eastern united states, perhaps due to competition with the southern flying squirrel (glaucomys volans). potential causes include parasite-mediated or apparent competition from the shared intestinal nematode, strongyloides robustus, which has been shown to detrimentally affect the northern flying squirrel but not the southern flying squirrel. to investigate this hypothesis, we cond ... | 2010 | 20090036 |
| take-off and landing forces and the evolution of controlled gliding in northern flying squirrels glaucomys sabrinus. | flying squirrels are well known for their ability to glide between trees at the top of a forest canopy. we present experimental performance and behavioural evidence that flight in flying squirrels may have evolved out of a need to control landing forces. northern flying squirrels were filmed jumping from a horizontal branch to a much larger vertical pole. these were both slightly compliant (less than 1.9 mm n(-1)), and instrumented using strain gauges so that forces could be measured. take-off a ... | 2007 | 17401124 |
| characterization of microsatellite loci in northern flying squirrels (glaucomys sabrinus). | | 2000 | 10849303 |
| mycophagy by small mammals in the coniferous forests of north america: nutritional value of sporocarps of rhizopogon vinicolor, a common hypogeous fungus. | we evaluated the nutritional value of sporocarps of rhizopogon vinicolor, a common hypogeous fungus in the coniferous forests of north america, for two small mammal species: the californian red-backed vole (clethrionomys californicus) and the northern flying squirrel (glaucomys sabrinus). although the nitrogen concentration of sporocarps was high, much of it was in non-protein form or associated with cell walls, suggesting that it may be of low nutritional value or protected from mammalian diges ... | 1999 | 10335615 |
| eimeria (protozoa: eimeriidae) from north american sciurids, glaucomys sabrinus and tamias townsendii: with a description of a new species. | from 1990 to 1991, 11 northern flying squirrels, glaucomys sabrinus, and 30 townsend's chipmunks, tamias townsendii, were live-trapped, marked, and released in macdonald forest, benton co., oregon and their feces at each capture examined for the presence of coccidian parasites. two eimerians were found in g. sabrinus: eimeria dorneyi and a second species we describe here as new. one species, eimeria vilasi, was identified from t. townsendii. sporulated oocysts of the new eimerian are strongly el ... | 1997 | 9194829 |
| comparative ontogeny of behaviour in four species of squirrels (sciuridae). | the development of behaviour in four species of sciurid rodents, having terrestrial, arboreal and gliding way of life, is quantified and compared. the studied species are: spermophilus columbianus, spermophilus lateralis, tamiasciurus hudsonicus and glaucomys sabrinus. for each behaviour pattern the earliest and latest age of emergence is given along with a mean calculated for a series of young of each species. the development of locomotion, feeding, comfort, alertness, exploration, nest buildin ... | 1981 | 7282122 |
| the chromosomes of the new world flying squirrels (glaucomys volans and glaucomys sabrinus) with special reference to autosomal heterochromatin. | | 1973 | 4732300 |
| mating behavior, gestation period, and development of glaucomys sabrinus. | | 1969 | 5813253 |
| an examination of endoparasites and fecal testosterone levels in flying squirrels (glaucomys spp.) using high performance liquid chromatography-ultra-violet (hplc-uv). | the immuno-competence hypothesis proposes that higher levels of testosterone increases the susceptibility to parasitism. here we examined the testosterone levels in two species of flying squirrels (glaucomys): one known to regularly host a nematode species (strongyloides robustus) without ill effects (g. volans) and a closely related species that is considered negatively affected by the parasite. we quantified fecal testosterone levels in northern and southern flying squirrels (g. sabrinus, g. v ... | 2017 | 28626636 |
| seasonal energetics and torpor use in north american flying squirrels. | seasonal cold temperatures require mammals to use morphological, behavioural, or physiological traits to survive periods of extreme cold and food shortage. torpor is a physiological state that minimizes energy requirements by decreasing resting metabolic rate (mr) and body temperature (tb). many rodent species are capable of torpor, however, evidence in northern and southern flying squirrels (glaucomys sabrinus and glaucomys volans, respectively) has remained anecdotal. we experimentally attempt ... | 2017 | 29108557 |
| signatures of selection in mammalian clock genes with coding trinucleotide repeats: implications for studying the genomics of high-pace adaptation. | climate change is predicted to affect the reproductive ecology of wildlife; however, we have yet to understand if and how species can adapt to the rapid pace of change. clock genes are functional genes likely critical for adaptation to shifting seasonal conditions through shifts in timing cues. many of these genes contain coding trinucleotide repeats, which offer the potential for higher rates of change than single nucleotide polymorphisms (snps) at coding sites, and, thus, may translate to fast ... | 2017 | 28944015 |
| spatial clustering of borrelia burgdorferi sensu lato within populations of allen's chipmunks and dusky-footed woodrats in northwestern california. | the ecology of lyme borreliosis is complex in northwestern california, with several potential reservoir hosts, tick vectors, and genospecies of borrelia burgdorferi sensu lato. the primary objective of this study was to determine the fine-scale spatial distribution of different genospecies in four rodent species, the california ground squirrel (otospermophilus beecheyi), northern flying squirrel (glaucomys sabrinus), dusky-footed woodrat (neotoma fuscipes), and allen's chipmunk (neotamias senex) ... | 2018 | 29634745 |
| coccidian parasites of flying squirrels, glaucomys spp. (rodentia: sciuridae), from alaska and arkansas, with a description of a new species of eimeria (apicomplexa: eimeriidae). | new world flying squirrels, glaucomys spp., are nocturnal arboreal sciurid rodents that have been previously surveyed for coccidial parasites. to date, 4 species of eimeria have been reported from 2 species of glaucomys. here we report 2 species of eimerians from southern flying squirrels (glaucomys volans) and the endemic prince of wales flying squirrel (glaucomys sabrinus griseifrons). oocysts of eimeria dorneyi levine and ivens were found to be passing in the feces of 4 g. s. griseifrons from ... | 2020 | 32579665 |