| development of eimeria larimerensis from the uinta ground-squirrel in cell cultures. | | 1970 | 4101355 |
| sexual differences in spatio-temporal interaction among badgers. | i tested the following hypotheses of territorial polygyny on badgers (taxidea taxus: carnivora; mustelidae): competition among adult females for food should result in intrasexual territoriality, while male competition for females should result in larger territories that encompass multiple female territories. the sagebrush-grassland study area (wyoming, usa) contained a depauperate terrestrial fauna with a dense badger population preying on high densities of ground squirrels (spermophilus armatus ... | 1993 | 28313656 |
| factors determining the abundance and distribution of rodents in a shrub-steppe ecosystem: the role of shrubs. | this study addressed the relative importances of shrub "resources" on a rodent community in a sagebrush dominated shrub-steppe ecosystem in southwestern wyoming. direct effects of shrubs (i.e., providing rodents with "food and cover") were assessed by removing shrubs from a 1.25 ha study plot and monitoring both rodent populations and their food resources. shrub architecture and shrub-related food resources were found to be unimportant to deermice (peromyscus maniculatus), great basin pocket mic ... | 1983 | 28310227 |
| seasonal variations in testicular monoamine oxidase in the house sparrow (passer domesticus) and uinta ground squirrels (spermophilus armatus). | | 1975 | 1116523 |
| source-sink dynamics structure a common montane mammal. | assessing the relative role of evolutionary processes on genetic diversity is critical for understanding species response to climatic change. however, many processes, independent of climate, can lead to the same genetic pattern. because effective population size and gene flow are affected directly by abundance and dispersal, population ecology has the potential to profoundly influence patterns of genetic variation over microevolutionary timescales. here, we use adna data and simulations to explo ... | 2009 | 19863718 |
| fire and ice: genetic structure of the uinta ground squirrel (spermophilus armatus) across the yellowstone hotspot. | the range of the uinta ground squirrel, spermophilus armatus, is centred over one of the most tectonically active regions today, the yellowstone hotspot. we document the role of quaternary tectonic and climatic history on the genetic structure of this species by screening museum and extant individuals throughout its range. phylogeographic, divergence time, and demographic analyses of partial mitochondrial cytochrome b and control region dna sequences yield insight into the cadence of evolution a ... | 2008 | 18284571 |
| body size, litter size, timing of reproduction, and juvenile survival in the unita ground squirrel, spermophilus armatus. | the timing of reproduction affected litter size, offspring mass, and offspring survival in the uinta ground squirrel, spermophilus armatus, in grand teton national park, wyoming. survival of juvenile females to yearling age varied negatively with date of weaning and positively with individual offspring mass. at the same time, juveniles weaned early in the season were lighter, and juveniles weaned later in the season were heavier. the coefficient of variation for juvenile body mass, originally me ... | 1996 | 28307388 |
| the reproductive cycle of male uinta ground squirrels: some anatomical and biochemical correlates. | 1. maximum testicular development and plasma testosterone levels occurred at spring emergence from aestivation-hibernation (a-h), followed by a regression to basal state in june. 2. a slight testicular recrudescense occurred just prior to immergence into a-h, but this development was not accompanied by a definitive increase in plasma testosterone levels or seminal vesicle weights. 3. four lines of evidence were consistent with the hypothesis that fsh stimulates testicular mao activity. 4. change ... | 1983 | 6131767 |
| age and seasonal differences in the synthesis and metabolism of testosterone by testicular tissue and pineal hiomt activity of uinta ground squirrels (spermophilus armatus). | | 1976 | 1278671 |
| photoperiod and crowding effects on testicular serotonin metabolism and lack of effects on melatonin synthesis in uinta ground squirrels (spermophilus armatus). | | 1973 | 4686189 |
| observations on the life cycle of eimeria bilamellata henry, 1932 in the uinta ground squirrel spermophilus armatus. | | 1968 | 5719069 |
| seasonal climate effects on the survival of a hibernating mammal. | global climate change and associated regional climate variability is impacting the phenology of many species, ultimately altering individual fitness and population dynamics. yet, few studies have considered the effects of pertinent seasonal climate variability on phenology and fitness. hibernators may be particularly susceptible to changes in seasonal climate since they have a relatively short active season in which to reproduce and gain enough mass to survive the following winter. to understand ... | 2019 | 31015964 |