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Showing 1 to 20 of 20 for “"Ovis canadensis"”.
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Evaluation of Mineral Use in Bighorn Sheep (Ovis canadensis)
Bighorn sheep (Ovis canadensis) are an ecologically fragile species (Valdez and Krausman 1999). Bighorn sheep are not federally listed as threatened or endangered, but they should be considered a species of concern due to human-induced disturbance and encroachment on their habitat (Krausman 1993). …
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Patterns of helminth and protozoan parasite infections in bighorn sheep, Ovis canadensis: sex, season and activity
… away from the hosts. I used bighorn sheep, Ovis canadensis, and five of their natural parasites, strongyle, Nematodirus spp., Marshallagia spp., lungworm and Eimeria spp., to investigate seasonality of parasites and host-sex bias and whether higher parasite FEC leads to individuals spending …
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Demography and movements of montain sheep (Ovis canadensis nelsoni) in the Kingston and Clark Mountain ranges, California
… defines the demography of mountain sheep (Ovis canadensis) populations in the area of the Kingston and Clark Mountain ranges in the eastern Mojave Desert, including: distribution, mark-recapture estimates, survival rates and recruitment rates. The third chapter describes seasonal …
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Facteurs biologiques influençant l'asymétrie fluctuante au niveau des anneaux de croissance des cornes des mouflons d'Amérique (Ovis canadensis)
… pour la population de mouflons d'Amérique ( Ovis canadensis ) de Ram Mountain, en Alberta, de 1972 à 1998. La théorie prédit que l'augmentation des stress amène une augmentation de l'asymétrie chez les individus et que cette dernière affecte négativement la longévité. Par conséquent, les …
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A study assessing forage quality and desert bighorn sheep (Ovis canadensis nelsoni) diet in central Nevada using microhistology and molecular analysis
Desert bighorn sheep (Ovis canadensis nelsoni) populations in central Nevada have suffered from die-offs although biologists and wildlife managers have struggled to determine the exact cause of these population declines, making population management difficult. An important, often overlooked and …
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L'effet du sexe et de la maladie ecthyma contagieuse sur le développement social et physique des jeunes mouflons des rocheuses (Ovis canadensis)
Une étude sur le développement physique et social des jeunes mouflons des Rocheuses a été effectuée, entre mai et octobre, en 1991 et 1992, dans la population de Ram Mountain, en Alberta. Des données recueillies par Jon Jorgenson durant les années 1978 à 1984, ainsi qu'en 1990 ont aussi été …
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Desert bighorn movements and habitat use in relation to the proposed Black Canyon Bridge Project, Nevada
… Nevada, to characterize bighorn sheep (Ovis canadensis) habitat quality, and information on movements of radio-collared bighorn to estimate home range size and patterns of movement. Study results were used to evaluate potential impacts of three proposed highway alignments (Gold Strike …
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Habitat Selection and Sexual Suggestion of Rocky Mountain Bighorn Sheep in Custer State Park, South Dakota
… between Rocky Mountain bighorn sheep (Ovis canadensis canadensis) ram and ewe herds has been documented by Geist (1971), Geist and Petocz (1977), Shank (1979), Morgantini and Hudson (1981), and Hogg (1983), where ram herds consist of mature males approximately 4 years old and older and …
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Lungworm Infections, Reproduction and Summer Habitat Use of Bighorn Sheep in Custer State Park, South Dakota
Bighorn sheep (Ovis canadensis) were once indigenous to the Black Hills and Badlands of South Dakota. When European settlers moved into this region during the late 1800' s, market hunting, loss of habitat, and introduction of animal diseases and parasites caused the subspecies of the region, the …
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Determining Impacts of Mountain Lions on Bighorn Sheep and Other Prey Sources in the Black Hills
… concolor) feeding habits and bighorn sheep (Ovis canadensis) population dynamics in the Black Hills, South Dakota. We used Global Positioning System (GPS) telemetry to locate 1,506 cougar feeding events and found deer (Odocoileus spp.; 83%), primarily white-tailed deer (O. virginianus), …
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Comparison of Wild-Domestic Sheep Interaction Policies in Bighorn Disease Outbreak Locations in the Continental U.S., 1990-2010
… disease has significantly limited bighorn sheep (Ovis canadensis) in the western U.S. Interaction with domestic sheep (Ovis aries) has been a primary cause of fatal bighorn disease (typically pneumonia), which has severely reduced or eliminated entire populations. Various wild-domestic sheep …
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CAUSE SPECIFIC MORTALITY OF DESERT BIGHORN SHEEP LAMBS IN THE FRA CRISTOBAL MOUNTAINS, NEW MEXICO, USA
Desert bighorn sheep (Ovis canadensis mexicana) are an endangered species in New Mexico. Many of the small, isolated populations of desert bighorn are declining, and factors affecting their growth rates include low lamb recruitment and high mortality of adults due to cougar predation. No one has …
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Comparison of Wild-Domestic Sheep Interaction Policies in Bighorn Disease Outbreak Locations in the Continental U.S., 1990-2010
… disease has significantly limited bighorn sheep (Ovis canadensis) in the western U.S. Interaction with domestic sheep (Ovis aries) has been a primary cause of fatal bighorn disease (typically pneumonia), which has severely reduced or eliminated entire populations. Various wild-domestic sheep …
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CAUSE SPECIFIC MORTALITY OF DESERT BIGHORN SHEEP LAMBS IN THE FRA CRISTOBAL MOUNTAINS, NEW MEXICO, USA
Desert bighorn sheep (Ovis canadensis mexicana) are an endangered species in New Mexico. Many of the small, isolated populations of desert bighorn are declining, and factors affecting their growth rates include low lamb recruitment and high mortality of adults due to cougar predation. No one has …
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Health Surveillance of Thinhorn Sheep (Ovis dalli) Herds in British Columbia and Alaska
… of free ranging thinhorn sheep populations (Ovis dalli), despite their economic, ecological, and cultural significance. Identification of health concerns in related species, bighorn sheep (Ovis canadensis), as well as concern from local communities, First Nations, hunters, and …
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Habitat Selection and Resource Use by Bighorn Sheep Following Translocation
… by translocation than bighorn sheep (Ovis canadensis). Bighorn sheep were once extirpated throughout much of their native range but have since been reintroduced to their historic habitat throughout the western United States, Mexico, and Canada. To date, over 22,000 individuals have …
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Evaluation of an Augmentation of Rocky Mountain Bighorn Sheep at Badlands National Park, South Dakota
<p>Audubon’s (a.k.a. Badlands) bighorn (Ovis canadensis auduboni [Merriam 1901] now O. c. Canadensis [Shaw 1804]), described as a subspecies of bighorn sheep, was extirpated from its range by 1924. In 1964, 22 Rocky Mountain bighorn sheep were translocated from Pikes Peak, Colorado, to Badlands …
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Escaping the extinction vortex: identifying factors affecting population performance and recovery in endangered Sierra Nevada bighorn sheep
An extinction vortex is one of the greatest threats to endangered species; when demographic, environmental, and genetic stochasticity interact with each other and with deterministic factors, such as habitat quality, to reinforce the demise of a small population. To successfully escape an extinction …
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Escaping the extinction vortex: identifying factors affecting population performance and recovery in endangered Sierra Nevada bighorn sheep
An extinction vortex is one of the greatest threats to endangered species; when demographic, environmental, and genetic stochasticity interact with each other and with deterministic factors, such as habitat quality, to reinforce the demise of a small population. To successfully escape an extinction …
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Spatial Patterns and Population Performance of Mule Deer: Responses to Water Provisioning in Mojave National Preserve, California
… other 3 components are readily available, the provisioning of water is expected to benefit populations of wildlife. Development of water sources in arid regions of the western United States has been a common practice used by wildlife and range managers in both state and federal agencies since the …