Results 151 to 160 of about 32,547 (191)
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Journal of Zoo and Wildlife Medicine, 2007
A comprehensive study of a pneumonic epizootic was initiated when the first signs of disease were noted in a metapopulation of bighorn sheep inhabiting Hells Canyon, bordering Idaho, Oregon, and Washington. A total of 92 bighorn sheep were tested for etiologic agents during the following 6-mo study period.
Richard B Rimler +2 more
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A comprehensive study of a pneumonic epizootic was initiated when the first signs of disease were noted in a metapopulation of bighorn sheep inhabiting Hells Canyon, bordering Idaho, Oregon, and Washington. A total of 92 bighorn sheep were tested for etiologic agents during the following 6-mo study period.
Richard B Rimler +2 more
exaly +3 more sources
Finite Element Analysis of Ramming in Ovis canadensis
Journal of Biomechanical Engineering, 2011 The energy produced during the ramming of bighorn sheep (Ovis canadensis) would be expected to result in undesirable stresses in their frontal skull, which in turn would cause brain injury; yet, this animal seems to suffer no ill effects. In general, horn is made of an α-keratin sheath covering a bone. Despite volumes of data on the ramming behavior of
Parimal, Maity +1 more
openaire +3 more sources
Canadian Journal of Zoology, 2020 This is a manuscript version of an article published as: Haines, J.A., Nason, S.E., Skurdal, A.M.M., Bourchier, T., Boutin, S., Taylor, R.W., McAdam, A.G., Lane, J.E., Kelley, A.D., Humphries, M.M., Gorrell, J.C., Dantzer, B., Coltman, D.W., & Hämäläinen,
Jamieson Gorrell +2 more
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CD11b of Ovis canadensis and Ovis aries: Molecular cloning and characterization
Veterinary Immunology and Immunopathology, 2007Leukotoxin (Lkt) is the primary virulence factor secreted by Mannheimia haemolytica which causes pneumonia in ruminants. Previously, we have shown that CD18, the beta subunit of beta(2) integrins, mediates Lkt-induced cytolysis of ruminant leukocytes.
Paulraj K, Lawrence +1 more
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Psoroptic Scabies in Rocky Mountain Bighorn Sheep (Ovis canadensis canadensis) from Wyoming
Journal of Wildlife Diseases, 1990Thirteen Rocky Mountain bighorn sheep (Ovis canadensis canadensis) with clinical signs of psoroptic scabies were captured in Wyoming. Signs included droopy ears, depilation on the head and neck, and exudate in the ears. Mites were identified as either Psoroptes cervinus or P. equi.
A L, Muschenheim +4 more
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Phenotypic and genetic variation in Rocky Mountain bighorn sheep (Ovis canadensis canadensis)
2023Genetic variation is a ubiquitous feature of natural populations and underpins much phenotypic variation. Genetic variance can be partitioned and examined at various hierarchical levels of organization to address fundamental questions in ecology and evolution.
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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 ...
R M, Silflow +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 ...
R M, Silflow +5 more
openaire +2 more sources
Genetics and the conservation of mountain sheep ovis canadensis nelsoni
Biological Conservation, 1986Abstract Recent hypotheses have proposed that mountain sheep were suffering from inbreeding depression. Here we present an alternative hypothesis. We have examined sheep migration abilities, the distances required for migration, and sheep mating patterns to challenge the inbreeding hypothesis and conclude that the sound application of more ...
Orlando A. Schwartz +2 more
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Biomechanical Analysis of Ramming Behavior in Ovis Canadensis
2011Horns have been hypothesized to help in absorbing shock and protecting the brain during ramming events. I general, horn is made of a a-keratin sheath covering a porous bone. The objective of the present study is to investigate the shock-absorptive role of the keratinous sheath and bony core of horns; particularly in Bighorn Sheep (Ovis Canadensis).
Parimal Maity, Srinivasan Arjun Tekalur
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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.
W J, Foreyt, J F, Evermann
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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.
W J, Foreyt, J F, Evermann
openaire +2 more sources