bighorn sheep

Summary

Summary: A species of sheep, Ovis canadensis, characterized by massive brown horns. There are at least four subspecies and they are all endangered or threatened.

Top Publications

  1. Rudolph K, Hunter D, Rimler R, Cassirer E, Foreyt W, DeLong W, et al. Microorganisms associated with a pneumonic epizootic in Rocky Mountain bighorn sheep (Ovis canadensis canadensis). J Zoo Wildl Med. 2007;38:548-58 pubmed
    ..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...
  2. Poissant J, Hogg J, Davis C, Miller J, Maddox J, Coltman D. Genetic linkage map of a wild genome: genomic structure, recombination and sexual dimorphism in bighorn sheep. BMC Genomics. 2010;11:524 pubmed publisher
    ..and genomic resources originally developed for domestic sheep (Ovis aries) to construct a linkage map for bighorn sheep, Ovis canadensis...
  3. Williams J, Shin T, Liu L, Flores Foxworth G, Romano J, Blue McClendon A, et al. Cloning of exotic/endangered species: desert bighorn sheep. Methods Mol Biol. 2006;348:169-82 pubmed
    ..Animal care and welfare issues raised that are unique to exotic and endangered species also are raised. In this chapter, the methods used in attempts to clone the wild animal species of Desert Bighorn Sheep are described.
  4. Luikart G, Pilgrim K, Visty J, Ezenwa V, Schwartz M. Candidate gene microsatellite variation is associated with parasitism in wild bighorn sheep. Biol Lett. 2008;4:228-31 pubmed publisher
    ..However, few data exist to test this hypothesis in natural populations. Bighorn sheep (Ovis canadensis) populations occasionally suffer disease-induced population declines, allowing us to test for ..
  5. Jansen B, Heffelfinger J, Noon T, Krausman P, deVos J. Infectious keratoconjunctivitis in bighorn sheep, Silver Bell Mountains, Arizona, USA. J Wildl Dis. 2006;42:407-11 pubmed
    An infectious keratoconjunctivitis (IKC) epizootic in bighorn sheep (Ovis canadensis) occurred in the Silver Bell Mountains, Arizona, USA, from 1 December 2003 to 31 March 2004...
  6. Wolfe L, Diamond B, Spraker T, Sirochman M, Walsh D, Machin C, et al. A bighorn sheep die-off in southern Colorado involving a Pasteurellaceae strain that may have originated from syntopic cattle. J Wildl Dis. 2010;46:1262-8 pubmed
    We investigated a pasteurellosis epizootic in free-ranging bighorn sheep (Ovis canadensis) wherein a Pasteurellaceae strain carried by syntopic cattle (Bos taurus) under severe winter conditions appeared to contribute to pneumonia in ..
  7. Festa Bianchet M, Coulson T, Gaillard J, Hogg J, Pelletier F. Stochastic predation events and population persistence in bighorn sheep. Proc Biol Sci. 2006;273:1537-43 pubmed
    ..Here, we consider the dynamics of three populations of individually marked bighorn sheep (Ovis canadensis) monitored for 24-28 years...
  8. Boyce W, Weisenberger M. The rise and fall of psoroptic scabies in bighorn sheep in the San Andres Mountains, New Mexico. J Wildl Dis. 2005;41:525-31 pubmed
    ..mountain lion (Puma concolor) predation, and periodic drought reduced a population of native desert bighorn sheep (Ovis canadensis) in the San Andres Mountains (SAM), New Mexico, from >200 individuals to a single ewe...
  9. Goldstein E, Millspaugh J, Washburn B, Brundige G, Raedeke K. Relationships among fecal lungworm loads, fecal glucocorticoid metabolites, and lamb recruitment in free-ranging Rocky Mountain bighorn sheep. J Wildl Dis. 2005;41:416-25 pubmed
    ..Indirect effects of lungworms on bighorn sheep are unknown, but high pulmonary burdens might increase stress (i.e...

More Information

Publications75

  1. Ezenwa V, Hines A, Archie E, Hoberg E, Asmundsson I, Hogg J. Muellerius capillaris dominates the lungworm community of bighorn sheep at the National Bison Range, Montana. J Wildl Dis. 2010;46:988-93 pubmed
    Lungworm infections are common among bighorn sheep (Ovis canadensis) in North America, and the predominant species reported are Protostrongylus stilesi and P. rushi...
  2. Safaee S, Weiser G, Cassirer E, Ramey R, Kelley S. Microbial diversity in bighorn sheep revealed by culture-independent methods. J Wildl Dis. 2006;42:545-55 pubmed
    ..effectiveness of culture-independent molecular methods for determining host-associated microbial diversity in bighorn sheep (Ovis canadensis)...
  3. Dassanayake R, Liu W, Davis W, Foreyt W, Srikumaran S. Bighorn sheep beta2-integrin LFA-1 serves as a receptor for Mannheimia haemolytica leukotoxin. J Wildl Dis. 2008;44:743-7 pubmed
    Mannheimia haemolytica is an important cause of pneumonia in bighorn sheep (BHS; Ovis canadensis). Leukotoxin (Lkt), the primary virulence determinant of M. haemolytica, induces cytolysis of all subsets of leukocytes...
  4. Colchero F, Medellin R, Clark J, Lee R, Katul G. Predicting population survival under future climate change: density dependence, drought and extraction in an insular bighorn sheep. J Anim Ecol. 2009;78:666-73 pubmed publisher
    ..2. We studied a population of desert bighorn sheep introduced to Tiburon Island, Mexico in 1975 and subjected to irregular extractions for the last 10 years...
  5. Weiser G, Miller D, Drew M, Rhyan J, Ward A. Variation in Pasteurella (Bibersteinia) and Mannheimia spp. following transport and antibiotic treatment in free-ranging and captive Rocky Mountain bighorn sheep (Ovis canadensis canadensis). J Zoo Wildl Med. 2009;40:117-25 pubmed
    Morbidity and mortality associated with respiratory disease following capture and translocation of bighorn sheep (Ovis canadensis canadensis) is a significant concern, particularly when establishing new or augmenting existing bighorn ..
  6. Foreyt W, Jenkins E, Appleyard G. Transmission of lungworms (Muellerius capillaris) from domestic goats to bighorn sheep on common pasture. J Wildl Dis. 2009;45:272-8 pubmed
    ..82-ha pasture for 11 mo from May 2003 to April 2004 with seven Rocky Mountain bighorn sheep (Ovis canadensis) that were not passing dorsal-spined larvae...
  7. Huby Chilton F, Gajadhar A, Mansfield K, Foreyt W, Chilton N. Bighorn sheep, a new host record for Parelaphostrongylus odocoilei (Nematoda: Protostrongylidae). J Wildl Dis. 2006;42:877-82 pubmed
    Larval nematodes with a dorsal spine on the tail were recovered from fecal samples of California bighorn sheep (Ovis canadensis californiana) in northeastern Washington State, USA...
  8. Tomassini L, Gonzales B, Weiser G, Sischo W. An ecologic study comparing distribution of Pasteurella trehalosi and Mannheimia haemolytica between Sierra Nevada bighorn sheep, White Mountain bighorn sheep, and domestic sheep. J Wildl Dis. 2009;45:930-40 pubmed
    The prevalence and phenotypic variability of Pasteurella and Mannheimia isolates from Sierra Nevada bighorn sheep (Ovis canadensis sierrae), White Mountain bighorn sheep (Ovis canadensis nelsoni), and domestic sheep (Ovis aries) from ..
  9. Poissant J, Wilson A, Festa Bianchet M, Hogg J, Coltman D. Quantitative genetics and sex-specific selection on sexually dimorphic traits in bighorn sheep. Proc Biol Sci. 2008;275:623-8 pubmed publisher
    ..genetic correlations for highly sexually dimorphic traits (horn volume and body mass) in a wild population of bighorn sheep (Ovis canadensis) and quantified sex-specific selection using estimates of longevity and lifetime reproductive ..
  10. Lawrence P, Shanthalingam S, Dassanayake R, Subramaniam R, Herndon C, Knowles D, et al. Transmission of Mannheimia haemolytica from domestic sheep (Ovis aries) to bighorn sheep (Ovis canadensis): unequivocal demonstration with green fluorescent protein-tagged organisms. J Wildl Dis. 2010;46:706-17 pubmed
    Previous studies demonstrated that bighorn sheep (Ovis canadensis) died of pneumonia when commingled with domestic sheep (Ovis aries) but did not conclusively prove that the responsible pathogens were transmitted from domestic to bighorn ..
  11. Ward A, Weiser G, Anderson B, Cummings P, Arnold K, Corbeil L. Haemophilus somnus (Histophilus somni) in bighorn sheep. Can J Vet Res. 2006;70:34-42 pubmed
    ..Therefore, reproductive tract and lung samples from bighorn sheep were evaluated for the presence of this organism. Organisms identified as H...
  12. De La Fuente J, Atkinson M, Hogg J, Miller D, Naranjo V, Almazan C, et al. Genetic characterization of Anaplasma ovis strains from bighorn sheep in Montana. J Wildl Dis. 2006;42:381-5 pubmed
    ..b>Bighorn sheep (Ovis canadensis), captured in Montana from December 2004 to January 2005, were tested for antibodies to ..
  13. George J, Martin D, Lukacs P, Miller M. Epidemic pasteurellosis in a bighorn sheep population coinciding with the appearance of a domestic sheep. J Wildl Dis. 2008;44:388-403 pubmed
    A pneumonia epidemic reduced bighorn sheep (Ovis canadensis) survival and recruitment during 1997-2000 in a population comprised of three interconnected wintering herds (Kenosha Mountains, Sugarloaf Mountain, Twin Eagles) that inhabited ..
  14. Rogerson J, Fairbanks W, Cornicelli L. Ecology of gastropod and bighorn sheep hosts of lungworm on isolated, semiarid mountain ranges in Utah, USA. J Wildl Dis. 2008;44:28-44 pubmed
    Isolated, nonmigratory populations of bighorn sheep (Ovis canadensis) may experience high exposure to lungworms (Protostrongylus spp.) through a build-up of fecal material...
  15. Besser T, Cassirer E, Potter K, VanderSchalie J, Fischer A, Knowles D, et al. Association of Mycoplasma ovipneumoniae infection with population-limiting respiratory disease in free-ranging Rocky Mountain bighorn sheep (Ovis canadensis canadensis). J Clin Microbiol. 2008;46:423-30 pubmed
    Bronchopneumonia is a population-limiting disease in bighorn sheep in much of western North America...
  16. Rudolph K, Hunter D, Foreyt W, Cassirer E, Rimler R, Ward A. Sharing of Pasteurella spp. between free-ranging bighorn sheep and feral goats. J Wildl Dis. 2003;39:897-903 pubmed
    Pasteurella spp. were isolated from feral goats and free-ranging bighorn sheep (Ovis canadensis canadensis) in the Hells Canyon National Recreation Area bordering Idaho, Oregon, and Washington (USA)...
  17. Raghavan B, Erickson K, Kugadas A, Batra S, Call D, Davis M, et al. Role of carriers in the transmission of pneumonia in bighorn sheep (Ovis canadensis). Biol Open. 2016;5:745-55 pubmed publisher
    In the absence of livestock contact, recurring lamb mortality in bighorn sheep (Ovis canadensis) populations previously exposed to pneumonia indicates the likely presence of carriers of pneumonia-causing pathogens, and possibly ..
  18. Grigg J, Wolfe L, Fox K, Killion H, Jennings Gaines J, Miller M, et al. Assessing Timing and Causes of Neonatal Lamb Losses in a Bighorn Sheep ( Ovis canadensis canadensis ) Herd via Use of Vaginal Implant Transmitters. J Wildl Dis. 2017;53:596-601 pubmed publisher
    ..of vaginal implant transmitters (VITs) as a means of detecting, capturing, and radio collaring Rocky Mountain bighorn sheep ( Ovis canadensis canadensis) lambs to estimate survival and to facilitate carcass recovery to assess causes ..
  19. Kosoy M, Bai Y, Enscore R, Rizzo M, Bender S, Popov V, et al. Bartonella melophagi in blood of domestic sheep (Ovis aries) and sheep keds (Melophagus ovinus) from the southwestern US: Cultures, genetic characterization, and ecological connections. Vet Microbiol. 2016;190:43-9 pubmed publisher
    ..melophagi and the sheep ked its main vector. This bacterium was not isolated from the blood of bighorn sheep and domestic goats belonging to the same subfamily Caprinae. B...
  20. Batra S, Shanthalingam S, Munske G, Raghavan B, Kugadas A, Bavanthasivam J, et al. Acylation Enhances, but Is Not Required for, the Cytotoxic Activity of Mannheimia haemolytica Leukotoxin in Bighorn Sheep. Infect Immun. 2015;83:3982-8 pubmed publisher
    ..We performed this study in bighorn sheep (Ovis canadensis) (BHS), since they are highly susceptible to M. haemolytica infection...
  21. Douhard M, Festa Bianchet M, Coltman D, Pelletier F. Paternal reproductive success drives sex allocation in a wild mammal. Evolution. 2016;70:358-68 pubmed publisher
    ..31 to 0.60 with sire reproductive success in wild bighorn sheep (Ovis canadensis)...
  22. O Toole D, Sondgeroth K. Histophilosis as a Natural Disease. Curr Top Microbiol Immunol. 2016;396:15-48 pubmed publisher
    ..somni is responsible for sporadic disease worldwide in cattle and, to a lesser extent, in small ruminants, bighorn sheep (Ovis canadensis), and North American bison (Bison bison). The importance of H...
  23. Drake A, Haut Donahue T, Stansloski M, Fox K, Wheatley B, Donahue S. Horn and horn core trabecular bone of bighorn sheep rams absorbs impact energy and reduces brain cavity accelerations during high impact ramming of the skull. Acta Biomater. 2016;44:41-50 pubmed publisher
    b>Bighorn sheep (Ovis canadensis) routinely experience violent impacts to the head as part of intraspecific fighting...
  24. Besser T, Cassirer E, Potter K, Foreyt W. Exposure of bighorn sheep to domestic goats colonized with Mycoplasma ovipneumoniae induces sub-lethal pneumonia. PLoS ONE. 2017;12:e0178707 pubmed publisher
    Bronchopneumonia is a population limiting disease of bighorn sheep (Ovis canadensis) that has been associated with contact with domestic Caprinae...
  25. Johnson K, Trim M, Francis D, Whittington W, Miller J, Bennett C, et al. Moisture, anisotropy, stress state, and strain rate effects on bighorn sheep horn keratin mechanical properties. Acta Biomater. 2017;48:300-308 pubmed publisher
    ..the effects of moisture, anisotropy, stress state, and strain rate on the mechanical properties of the bighorn sheep (Ovis Canadensis) horn keratin...
  26. Manlove K, Cassirer E, Plowright R, Cross P, Hudson P. Contact and contagion: Probability of transmission given contact varies with demographic state in bighorn sheep. J Anim Ecol. 2017;86:908-920 pubmed publisher
    ..We used measured contact networks to test whether bighorn sheep demographic states vary systematically in infectiousness or susceptibility to Mycoplasma ovipneumoniae, an ..
  27. Pigeon G, Festa Bianchet M, Pelletier F. Long-term fitness consequences of early environment in a long-lived ungulate. Proc Biol Sci. 2017;284: pubmed publisher
    ..Early-life conditions can induce long-term changes in fitness components, and their effects on cohort fitness vary according to adult environment. ..
  28. Kugadas A, Humann J, Pierle S, Srikumaran S, Brayton K. Genome Sequence of Bibersteinia trehalosi Strain Y31 Isolated from the Pneumonic Lung of a Bighorn Sheep. Genome Announc. 2016;4: pubmed publisher
    Here, we report the genome sequence for Bibersteinia trehalosi strain Y31, isolated from the lungs of a bighorn sheep (Ovis canadensis) that had succumbed to pneumonia, which exhibits proximity-dependent inhibition (PDI) of Mannheimia ..
  29. Raghavan B, Bavananthasivam J, Kugadas A, Haldorson G, Srikumaran S. Effect of vaccination against pneumonia on the survival of bighorn sheep (Ovis canadensis) commingled with carrier animals. Vet Microbiol. 2017;203:56-61 pubmed publisher
    ..particularly Mannheimia haemolytica and Bibersteinia trehalosi are important pathogens of pneumonia in bighorn sheep (BHS; Ovis canadensis), causing fatal disease...
  30. Pigeon G, Pelletier F. Direct and indirect effects of early-life environment on lifetime fitness of bighorn ewes. Proc Biol Sci. 2018;285: pubmed publisher
    ..We exploited 42 years of individual-based data on bighorn sheep to test for causal links between birth density, body mass, age at first reproduction (AFR), longevity and ..
  31. Kelly E, Roug A, Jones C, Seamons J, Hall J. Corynebacterium pseudotuberculosis and Copper Deficiency in a Male Rocky Mountain Bighorn Sheep (Ovis canadensis canadensis) in Utah, USA. J Wildl Dis. 2017;: pubmed publisher
    ..In addition, the ram was severely copper deficient, with a liver copper concentration of 1.6 mg/kg...
  32. Merkle J, Monteith K, Aikens E, Hayes M, Hersey K, Middleton A, et al. Large herbivores surf waves of green-up during spring. Proc Biol Sci. 2016;283: pubmed publisher
    ..selection functions parametrized with movement data during the green-up period from two populations each of bighorn sheep, mule deer, elk, moose and bison, totalling 463 individuals monitored 1-3 years from 2004 to 2014...
  33. Batra S, Shanthalingam S, Donofrio G, Haldorson G, Chowdhury S, White S, et al. Immunization of bighorn sheep against Mannheimia haemolytica with a bovine herpesvirus 1-vectored vaccine. Vaccine. 2017;35:1630-1636 pubmed publisher
    Mannheimia haemolytica is an important pathogen of pneumonia in bighorn sheep (BHS), consistently causing 100% mortality under experimental conditions. Leukotoxin is the critical virulence factor of M. haemolytica...
  34. Huang W, Zaheri A, Jung J, Espinosa H, McKittrick J. Hierarchical structure and compressive deformation mechanisms of bighorn sheep (Ovis canadensis) horn. Acta Biomater. 2017;64:1-14 pubmed publisher
    b>Bighorn sheep (Ovis canadensis) rams hurl themselves at each other at speeds of ∼9 m/s (20 mph) to fight for dominance and mating rights...
  35. Douhard M, Festa Bianchet M, Pelletier F. Maternal condition and previous reproduction interact to affect offspring sex in a wild mammal. Biol Lett. 2016;12: pubmed publisher
    ..We analysed 39 years of data on bighorn sheep (Ovis canadensis) that fit all the assumptions of the Trivers-Willard hypothesis...
  36. Billeter S, Osikowicz L, Burns J, Konde L, Gonzales B, Hu R, et al. Molecular Surveillance for Bartonella, Borrelia, and Rickettsia Species in Ticks from Desert Bighorn Sheep (Ovis canadensis) and Mule Deer (Odocoileus hemionus) in Southern California. J Wildl Dis. 2017;: pubmed publisher
    Ticks (Acari: Ixodidae) were collected from 44 desert bighorn sheep (Ovis canadensis) and 10 mule deer (Odocoileus hemionus) in southern California during health inspections in 2015-16...
  37. Plowright R, Manlove K, Besser T, Páez D, Andrews K, Matthews P, et al. Age-specific infectious period shapes dynamics of pneumonia in bighorn sheep. Ecol Lett. 2017;20:1325-1336 pubmed publisher
    ..We detected persistent infections of Mycoplasma ovipneumoniae, the primary causative agent of pneumonia in bighorn sheep (Ovis canadensis), in a small number of older individuals that were homozygous at an immunologically relevant ..
  38. Butler C, Edwards W, Jennings Gaines J, Killion H, Wood M, McWhirter D, et al. Assessing respiratory pathogen communities in bighorn sheep populations: Sampling realities, challenges, and improvements. PLoS ONE. 2017;12:e0180689 pubmed publisher
    Respiratory disease has been a persistent problem for the recovery of bighorn sheep (Ovis canadensis), but has uncertain etiology...
  39. Hamel S, Gaillard J, Festa Bianchet M, Côté S. Individual quality, early-life conditions, and reproductive success in contrasted populations of large herbivores. Ecology. 2009;90:1981-95 pubmed
    ..for cohorts born under unfavorable conditions as opposed to favorable ones, but the opposite was found in bighorn sheep and mountain goats...
  40. Sacco R, Waters W, Rudolph K, Drew M. Comparative nitric oxide production by LPS-stimulated monocyte-derived macrophages from Ovis canadensis and Ovis aries. Comp Immunol Microbiol Infect Dis. 2006;29:1-11 pubmed
    b>Bighorn sheep are more susceptible to respiratory infection by Mannheimia haemolytica than are domestic sheep...
  41. Rominger E, Bleich V, Goldstein E. Bighorn sheep, mountain lions, and the ethics of conservation. Conserv Biol. 2006;20:1341; author reply 1341 pubmed
  42. De La Fuente J, Atkinson M, Naranjo V, Fernandez de Mera I, Mangold A, Keating K, et al. Sequence analysis of the msp4 gene of Anaplasma ovis strains. Vet Microbiol. 2007;119:375-81 pubmed
    ..In this study, we evaluated bighorn sheep (Ovis canadensis) and mule deer (Odocoileus hemionus) from Montana for infection with A...
  43. Johnson H, Mills L, Stephenson T, Wehausen J. Population-specific vital rate contributions influence management of an endangered ungulate. Ecol Appl. 2010;20:1753-65 pubmed
    ..limitations in an analysis of vital rates most important in the dynamics of federally endangered Sierra Nevada bighorn sheep (Ovis canadensis sierrae)...
  44. Pelletier F, Reale D, Garant D, Coltman D, Festa Bianchet M. Selection on heritable seasonal phenotypic plasticity of body mass. Evolution. 2007;61:1969-79 pubmed
    ..We investigated the genetic basis of, and selection acting on, seasonal plasticity in body mass for wild bighorn sheep ewes (Ovis canadensis) at Ram Mountain, Alberta, under two contrasting environmental conditions...
  45. Epps C, Palsbøll P, Wehausen J, Roderick G, McCullough D. Elevation and connectivity define genetic refugia for mountain sheep as climate warms. Mol Ecol. 2006;15:4295-302 pubmed
    ..We assessed genetic diversity of 25 populations of desert bighorn sheep (Ovis canadensis nelsoni) in southeastern California, where temperatures have increased and precipitation has ..
  46. Foreyt W. Experimental infection of bighorn sheep with liver flukes (Fasciola hepatica). J Wildl Dis. 2009;45:1217-20 pubmed
    Nine Rocky Mountain bighorn sheep (Ovis canadensis canadensis) were each inoculated orally with 250 metacercariae of Fasciola hepatica...
  47. Dassanayake R, Call D, Sawant A, Casavant N, Weiser G, Knowles D, et al. Bibersteinia trehalosi inhibits the growth of Mannheimia haemolytica by a proximity-dependent mechanism. Appl Environ Microbiol. 2010;76:1008-13 pubmed publisher
    ..haemolytica is the only pathogen that consistently causes severe bronchopneumonia and rapid death of bighorn sheep (BHS; Ovis canadensis) under experimental conditions...
  48. Shanthalingam S, Norimine J, Brown W, Srikumaran S. Molecular cloning of CD18 of bison, deer and elk, and comparison with that of other ruminants and non-ruminants. Vet Immunol Immunopathol. 2010;136:163-9 pubmed publisher
    Pneumonia caused by Mannheimia haemolytica is an important disease of cattle, domestic sheep, bighorn sheep and goats. Leukotoxin (Lkt) produced by M. haemolytica is cytolytic to all leukocyte subsets of these species...
  49. Bonenfant C, Pelletier F, Garel M, Bergeron P. Age-dependent relationship between horn growth and survival in wild sheep. J Anim Ecol. 2009;78:161-71 pubmed publisher
    ..We suggest that horn size is a very poor index of reproductive effort and that males modulate their mating activities and energy allocation to horn growth to limit its impact on survival...
  50. Bender L, Li H, Thompson B, Morrow P, Valdez R. Infectious disease survey of gemsbok in New Mexico. J Wildl Dis. 2003;39:772-8 pubmed
    ..above diseases in gemsbok is of interest to managers because of potential implications for recovery of desert bighorn sheep (Ovis canadensis mexicana) and desert mule deer (Odocoileus hemionus crooki) in the White Sands area because ..
  51. DeForge J, Cone L. The serologic prevalence of Q fever (Coxiella burnetii) complement-fixing antibodies in the Peninsular bighorn sheep of Southern California. Am J Trop Med Hyg. 2006;75:315-7 pubmed
    ..sheep, we elected to study the prevalence of complement fixing antibodies to Coxiella burnetii in native bighorn sheep who reside in the lower levels of the mountains surrounding the desert...
  52. Shanthalingam S, Topliff C, Kelling C, Srikumaran S. Bighorn sheep fetal lung cell line for detection of respiratory viruses. Can J Vet Res. 2010;74:75-7 pubmed
    Pneumonia is an important disease of bighorn sheep (BHS) that is primarily responsible for the drastic decline in numbers of these animals in North America...
  53. Schoelkopf L, Hutchinson C, Bendele K, Goff W, Willette M, Rasmussen J, et al. New ruminant hosts and wider geographic range identified for Babesia odocoilei (Emerson and Wright 1970). J Wildl Dis. 2005;41:683-90 pubmed
    Babesia odocoilei was found to infect two previously unknown host species, desert bighorn sheep (Ovis canadensis nelsoni) and musk oxen (Ovibos moschatus), both of which are members of the family Bovidae. Previously, B...
  54. Feder C, Martin J, Festa Bianchet M, Bérubé C, Jorgenson J. Never too late? Consequences of late birthdate for mass and survival of bighorn lambs. Oecologia. 2008;156:773-81 pubmed publisher
    ..interacts with sex, maternal characteristics and environmental variables to affect the growth and survival of bighorn sheep (Ovis canadensis) lambs in a marked population in Alberta...
  55. Keating K, Cherry S. Modeling utilization distributions in space and time. Ecology. 2009;90:1971-80 pubmed
    ..we estimate the expected UD in three dimensions (x, y, and t) for animals belonging to each of two distinct bighorn sheep (Ovis canadensis) social groups in Glacier National Park, Montana, USA...
  56. Rosen L, Walsh D, Wolfe L, Bedwell C, Miller M. Effects of selenium supplementation and sample storage time on blood indices of selenium status in bighorn sheep. J Wildl Dis. 2009;45:795-801 pubmed
    Periodic pneumonia outbreaks cause large-scale die-offs that threaten the viability of bighorn sheep (Ovis canadensis) populations...
  57. Schoenecker K, Lyda R, Kirkpatrick J. Comparison of three fecal steroid metabolites for pregnancy detection used with single sampling in bighorn sheep (Ovis canadensis). J Wildl Dis. 2004;40:273-81 pubmed
    ..fecal steroid metabolite assays for their usefulness in detecting pregnalcy among free-ranging Rocky Mountain bighorn sheep (Ovis canadensis canadensis) from Bighorn Canyon National Recreation Area, Wyoming and Montana (USA) and ..
  58. Kreeger T, Cook W, Edwards W, Cornish T. Brucellosis in captive Rocky Mountain bighorn sheep (Ovis canadensis) caused by Brucella abortus biovar 4. J Wildl Dis. 2004;40:311-5 pubmed
    Nine (four female, five male) captive adult Rocky Mountain bighorn sheep (Ovis canadensis) contracted brucellosis caused by Brucella abortus biovar 4 as a result of natural exposure to an aborted elk (Cervus elaphus) fetus...
  59. Herndon C, Foreyt W, Srikumaran S. Differential expression of interleukin-8 by polymorphonuclear leukocytes of two closely related species, Ovis canadensis and Ovis aries, in response to Mannheimia haemolytica infection. Infect Immun. 2010;78:3578-84 pubmed publisher
    The pneumonic lesions and mortality caused by Mannheimia haemolytica in bighorn sheep (BHS; Ovis canadensis) are more severe than those in the related species, domestic sheep (DS; Ovis aries), under both natural and experimental ..
  60. Meadows J, Hanotte O, Drogemuller C, Calvo J, Godfrey R, Coltman D, et al. Globally dispersed Y chromosomal haplotypes in wild and domestic sheep. Anim Genet. 2006;37:444-53 pubmed
    ..nucleotide polymorphism (oY1) in the SRY promoter region revealed that allele A-oY1 was present in all wild bighorn sheep (Ovis canadensis), two subspecies of thinhorn sheep (Ovis dalli), European Mouflon (Ovis musimon) and the ..
  61. Engen S, Lande R, Saether B, Festa Bianchet M. Using reproductive value to estimate key parameters in density-independent age-structured populations. J Theor Biol. 2007;244:308-17 pubmed
    ..We illustrate the method by estimating the long-run growth rate and the environmental variance in an exponentially growing population of Bighorn Sheep.
  62. Cassaigne G I, Medellin R, Guasco O J. Mortality during epizootics in bighorn sheep: effects of initial population size and cause. J Wildl Dis. 2010;46:763-71 pubmed
    One of the most severe threats to bighorn sheep (Ovis canadensis) populations is disease...
  63. Dassanayake R, Shanthalingam S, Herndon C, Lawrence P, Frances Cassirer E, Potter K, et al. Mannheimia haemolytica serotype A1 exhibits differential pathogenicity in two related species, Ovis canadensis and Ovis aries. Vet Microbiol. 2009;133:366-71 pubmed publisher
    Mannheimia haemolytica causes pneumonia in both bighorn sheep (BHS, Ovis canadensis) and domestic sheep (DS, Ovis aries). Under experimental conditions, co-pasturing of BHS and DS results in fatal pneumonia in BHS...
  64. Hamel S, Côté S, Gaillard J, Festa Bianchet M. Individual variation in reproductive costs of reproduction: high-quality females always do better. J Anim Ecol. 2009;78:143-51 pubmed publisher
    ..detailed longitudinal data from three contrasted ungulate populations (mountain goats, Oreamnos americanus; bighorn sheep, Ovis canadensis; and roe deer, Capreolus capreolus), we assessed how individual quality affects the ..
  65. Liu W, Brayton K, Davis W, Mansfield K, Lagerquist J, Foreyt W, et al. Mannheimia (Pasteurella) haemolytica leukotoxin utilizes CD18 as its receptor on bighorn sheep leukocytes. J Wildl Dis. 2007;43:75-81 pubmed
    Pneumonia caused by Mannheimia (Pasteurella) haemolytica is a highly fatal disease of bighorn sheep (Ovis canadensis). Leukotoxin (Lkt), secreted by M...
  66. McNeil H, Shewen P, Lo R, Conlon J, Miller M. Novel protease produced by a Pasteurella trehalosi serotype 10 isolate from a pneumonic bighorn sheep: characteristics and potential relevance to protection. Vet Microbiol. 2003;93:145-52 pubmed
    A strain of Pasteurella trehalosi serotype 10, E(CO)-100, isolated from a bighorn sheep that had succumbed to pneumonic pasteurellosis during an epizootic, was compared to well-characterized strains of P...