Results 31 to 40 of about 32,547 (191)

Sympatry Increases Predation Risk for an Endangered Ungulate. [PDF]

Ecol Evol
We characterized predation risk for Peninsular bighorn sheep and southern mule deer across their ranges to understand how topography, habitat, forage, and prey habitat suitability affect where pumas are likely to predate both species. The presence of the second ungulate species increased predation risk for both species but had the greatest effect on ...
Gordon D, Lewison RL, Botta R, Vickers W, Najera F, Jennings M.   +5 more
europepmc   +2 more sources

A simple genetic method to distinguish mule deer and bighorn sheep fecal pellets and its application to detecting bighorn sheep colonization events in California

California Fish and Wildlife Journal, 2023
Bighorn sheep (Ovis canadensis) habitat frequently is geographically discontinuous and the metapopulation model fits this species well. Consequently, extinction-colonization dynamics are important and need to be monitored.
John Wehausen
doaj   +1 more source

Restoration of bighorn sheep: History, successes, and remaining conservation issues

Frontiers in Ecology and Evolution, 2023
Mammals are imperiled worldwide, primarily from habitat loss or modification, and exhibit downward trends in their populations and distributions. Likewise, large-bodied herbivores have undergone a collapse in numbers and are at the highest extinction ...
Jericho C. Whiting, Vernon C. Bleich, R. Terry Bowyer, Clinton W. Epps   +3 more
doaj   +1 more source

Harnessing cross-species alignment to discover SNPs and generate a draft genome sequence of a bighorn sheep (Ovis canadensis). [PDF]

BMC Genomics, 2015
Background Whole genome sequences (WGS) have proliferated as sequencing technology continues to improve and costs decline. While many WGS of model or domestic organisms have been produced, a growing number of non-model species are also being sequenced ...
Miller JM, Moore SS, Stothard P, Liao X, Coltman DW.   +4 more
europepmc   +2 more sources

Contagious Ecthyma in a Rocky Mountain Bighorn Sheep from Utah

Human-Wildlife Interactions, 2017
In December 2008, near Flaming Gorge Reservoir in northeastern Utah, a 2 ½-year-old male Rocky Mountain bighorn sheep (Ovis canadensis canadensis) was reported in poor body condition with bloody lesions covering the muzzle area. The sheep was euthanized,
David J. Wilson, Leslie McFarlane
doaj   +1 more source

Osteoporosis and Cranial Asymmetry in a Mountain Sheep (Ovis canadensis) [PDF]

Journal of Wildlife Diseases, 1990
The skull of a mountain sheep (Ovis canadensis cremnobates) exhibiting osteoporosis was recovered from San Diego County, California. This specimen also exhibited lateral asymmetry of the cranium and rostrum, malocclusion of molars, and mandibular asymmetry.
V C, Bleich, J G, Stahmann, R T, Bowyer, J E, Blake   +3 more
openaire   +2 more sources

Comparative functional morphological study of the tarsal joint mobility in artiodactyls and perissodactyls in light of astragalar morphological differences. [PDF]

J Anat
This study investigated how variations in the shape of the astragalus affect tarsal joint behavior, using CT scans. In artiodactyls with a double‐pulley astragalus, the calcaneus shifted plantarly during plantarflexion. This suggests the movement increases hindlimb functional length and contributes to enhanced running speed.
Takeda SI, Masuda Y, Nguyen TS, Endo H.
europepmc   +2 more sources

Genetic and Environmental Indicators of Climate Change Vulnerability for Desert Bighorn Sheep

Frontiers in Ecology and Evolution, 2020
Assessments of organisms’ vulnerability to potential climatic shifts are increasingly common. Such assessments are often conducted at the species level and focused primarily on the magnitude of anticipated climate change (i.e., climate exposure). However,
Tyler G. Creech, Clinton W. Epps, John D. Wehausen, Rachel S. Crowhurst, Jef R. Jaeger, Kathleen Longshore, Brandon Holton, William B. Sloan, Ryan J. Monello   +8 more
doaj   +1 more source

Heterogeneity in risk‐sensitive allocation of somatic reserves in a long‐lived mammal

Ecosphere, 2022
Food quality and availability, when combined with energetic demands in seasonal environments, shape resource acquisition and allocation by animals and hold consequences for life‐history strategies.
Rachel A. Smiley, Brittany L. Wagler, Tayler N. LaSharr, Kristin A. Denryter, Thomas R. Stephenson, Alyson B. Courtemanch, Tony W. Mong, Daryl Lutz, Doug McWhirter, Doug Brimeyer, Patrick Hnilicka, Blake Lowrey, Kevin L. Monteith   +12 more
doaj   +1 more source

Habitat use by desert bighorn sheep in sonora, México

Pirineos: Revista de Ecología de Montaña, 2002
[fr] Nous avons étudié les différents composants de l'utilisation de l'habitat par le mouflon américain (Ovis canadensis) afin d'expliquer sa ségrégation sexuelle dans la Sierra el Viejo, à Sonora, Mexique.
L. A. Tarango, R. Krausman, R. Valdez
doaj   +1 more source