Results 211 to 220 of about 6,899 (231)
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Journal of Wildlife Diseases, 1989
Alveolar macrophages were obtained from Rocky Mountain bighorn sheep (Ovis canadensis canadensis) and domestic sheep for the purpose of comparing pulmonary host defense mechanisms in the two species. Specific variables studied included (1) characterization of the cell types present in the lung, (2) alveolar macrophage phagocytic and bactericidal ...
William J. Foreyt +5 more
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Alveolar macrophages were obtained from Rocky Mountain bighorn sheep (Ovis canadensis canadensis) and domestic sheep for the purpose of comparing pulmonary host defense mechanisms in the two species. Specific variables studied included (1) characterization of the cell types present in the lung, (2) alveolar macrophage phagocytic and bactericidal ...
William J. Foreyt +5 more
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Play frequencies in captive and free‐ranging bighorn lambs (Ovis canadensis canadensis)
Zoo Biology, 1987AbstractBehavioral observations on captive animals are frequently extrapolated to provide species‐typical descriptions of a given behavior. Comparative studies of free‐ranging and captive animals are critical to substantiate this practice. We compared play frequencies in two populations of bighorn sheep (Ovis canadensis canadensis).
Jennifer H. Fewell, Beth Bennett
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On lactation and rumination in bighorn ewes ( Ovis canadensis )
Journal of Zoology, 2005Because lactation has high energetic costs, females should vary their foraging behaviour according to reproductive status. In ungulates, however, some studies found no differences in feeding behaviour between non-reproductive (yeld) and lactating females.
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Journal of Wildlife Diseases, 1988
Five Rocky Mountain bighorn sheep (Ovis canadensis canadensis), approximately 5 mo old and without detectable antibody titers to respiratory syncytial virus (RSV), were assigned to two groups to study the effects of RSV challenge inoculation in vaccinated (n = 3) and unvaccinated (n = 2) bighorns.
James F. Evermann, William J. Foreyt
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Five Rocky Mountain bighorn sheep (Ovis canadensis canadensis), approximately 5 mo old and without detectable antibody titers to respiratory syncytial virus (RSV), were assigned to two groups to study the effects of RSV challenge inoculation in vaccinated (n = 3) and unvaccinated (n = 2) bighorns.
James F. Evermann, William J. Foreyt
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Sexual segregation in desert bighorn sheep (Ovis canadensis mexicana)
Behaviour, 2003One or several factors could explain sexual segregation, in which males and females of polygynous, sexually dimorphic species form separate herds during most of the year. Bighorn sheep (Ovis canadensis) are polygynous ungulates that exhibit extreme sexual dimorphism and segregate into ram and ewe herds outside of the rutting season.
Ian C. Fraser +6 more
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Social integration and acclimation of translocated bighorn sheep (Ovis canadensis)
Biological Conservation, 2018Abstract Translocation of animals to reinforce small populations is a widespread technique in conservation biology. Recent reviews of translocation science underline the need to monitor translocated individuals. We sought to quantify social integration within the resident population and acclimation to a new environment of translocated bighorn sheep ...
Marc-Antoine Poirier +3 more
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Occurence of Upper Canines in Mountain Sheep, Ovis canadensis
American Midland Naturalist, 1943Discovery of upper canines or their alveoli in three specimens of mountain sheep led me to search for records of these teeth in sheep and their relatives. Most references concerning the teeth of the Bovidae (antelope, sheep, and cattle) state that upper canines are absent. Actually, exceptions to this rule have been recorded, but they are few.
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Mining activity and habitat use by mountain sheep (Ovis canadensis)
European Journal of Wildlife Research, 2008We studied mountain sheep in the vicinity of three high-wall limestone mines in San Bernardino County, CA, USA to evaluate factors that influenced habitat use and, specifically, to investigate the influence of mining activity on distribution of those specialized ungulates.
James H. Davis +4 more
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Some aspects of geophagia in Wyoming bighorn sheep (Ovis canadensis)
European Journal of Wildlife Research, 2007Geophagia has been commonly reported for bighorn sheep (Ovis canadensis) and other ungulates worldwide. The phenomenon is often attributed to the need to supplement animal diets with minerals available in the soil at mineral lick locations. Sodium is the mineral most frequently cited as being the specific component sought, although this has not been ...
T. P. Houghton +4 more
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Development and Application of Genomic Resources for Bighorn Sheep (Ovis canadensis) [PDF]
, 2015 Since the mid-2000’s there has been a major shift in molecular ecology to the use of genomic methodologies. These methods utilize genome-wide sampling of genetic variation and allow for consideration of questions that cannot be answered with a handful of microsatellite markers or a few gene sequences.
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