Wildlife habitats in managed rangelands—The Great Basin of southeastern Oregon.

Dyke, W. Van; Sands, Alan R.; Yoakum, James D.; Polenz, Allan; Blaisdell, James P.

doi:10.2737/pnw-gtr-159

Cited by 23 publications

(9 citation statements)

References 22 publications

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“…The latter requirement was due to the water demands of lactating ewes and because of the restrictions on travel of young lambs. These criteria for lambing period habitat were developed from field studies of Geist (1971) and Van Dyke et al (1983), and can also be supported by the work of Ravey (1984), Creeden (1986), Armentrout and Brigham (1988), and Etchberger and Krausman (1999). Birthing typically occurs on the steepest slopes, but lambing period habitat also encompasses areas used during the six-week postpartum period before ewes and lambs join nursery groups.…”

Section: Habitat Modeling-gis Methods-all Populationsmentioning

confidence: 89%

Test of a Modified Habitat Suitability Model for Bighorn Sheep

Zeigenfuss

Singer

Gudorf

2000

Restoration Ecology

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Translocation of bighorn sheep (Ovis canadensis) is time, labor, and cost intensive and, therefore, high levels of success are desirable. We tested a widely used habitat suitability model against translocation success and then modified it to include additional factors which improved its usefulness in predicting appropriate translocation sites. The modified Smith habitat suitability model for bighorn sheep was 64% accurate in predicting success or failure of 32 translocations of bighorn sheep into the Rocky Mountains, Colorado Plateau desert, and prairie‐badlands of six states. We had sheep location data for 13 populations, and the modified habitat model predicted the areas used by bighorn sheep with greater than 90% accuracy in eight populations, greater than 55% accuracy in four populations, and less than 55% accuracy in one population. Translocations were more successful when sheep were placed into discrete habitat patches containing a high proportion of lambing period habitat (>10% of suitable habitat, p = 0.05), where animals had a migratory tendency ( p = 0.02), no contact with domestic sheep ( p = 0.02), or greater distance to domestic sheep (>23 km, p = 0.02). Rate of population growth was best predicted by area of lambing period habitat, potential area of winter range, and distance to domestic sheep. We retested the model using these refined criteria and the refined model then predicted success or failure of these 32 translocated populations with 82% accuracy.

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Section: Habitat Modeling-gis Methods-all Populationsmentioning

confidence: 89%

Test of a Modified Habitat Suitability Model for Bighorn Sheep

Zeigenfuss

Singer

Gudorf

2000

Restoration Ecology

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“…The availability of high-quality forage also affects the extent that animals require free drinking water. In times of drought, low-quality forage containing little water can tether herds to scarce free water sources and eventually restrict herd size [2,91,134,150].…”

Section: Climate Patterns and Artiodactyl Reproductive Ecologymentioning

confidence: 99%

Holocene artiodactyl population histories and large game hunting in the Wyoming Basin, USA

Byers

Smith²,

Broughton

2005

Journal of Archaeological Science

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“…As such, they depend on steep, rocky terrain with open visibility, and these habitat patches tend to occur as islands within larger areas of seemingly unsuitable habitat. In boreal systems, they live in open habitat and will travel through, but not reside permanently in, forested areas because of restricted visibility in such habitats (Geist 1971;Risenhoover & Bailey 1985;Van Dyke et al 1983). In arid, desert systems that are uniformly open, permanent populations of bighorns generally are restricted to insular mountain ranges separated by extensive intermountain flats (Schwartz et al 1986;Bleich et al 1990Bleich et al , 1996.…”

Section: Introductionmentioning

confidence: 99%

Restoration of Bighorn Sheep Metapopulations in and Near Western National Parks

Singer

Bleich

Gudorf

2000

Restoration Ecology

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Bighorn sheep (Ovis canadensis) once were ubiquitous in large areas, including lands now contained in the national parks of the Intermountain and Colorado Plateau regions of the United States. Due to catastrophic declines in the late 1800s and early 1900s, most extant populations now occur as small, isolated groups with a highly fragmented distribution. Three different subspecies of bighorn sheep were extirpated from 14 of 18 areas that are now managed by the National Park Service. We describe an eight‐year plan to restore bighorn sheep to currently suitable historic habitats in the national parks within a six‐state intermountain region of the western United States, 1991–1998. A seven‐point program was recommended for each park unit that included: (1) survey the existing populations; (2) conduct a GIS‐based habitat assessment to identify suitable habitat; (3) convene scientific advisory panels to review results of habitat assessment; (4) convene interagency panels to discuss metapopulation management and to plan the restoration(s); (5) draft interagency restoration and management plans; (6) conduct translocation(s); and (7) monitor the populations. We evaluated 38,781 km2 of area; 32% (12,329 km2) was potential habitat for bighorn sheep. The scientific advisory panels and the GIS modeling recommended bighorn restoration on 73 sites within these areas. By 1996, 36 of these sites (2,647 km2 or 22% of the entire suitable area) were inhabited by bighorn sheep. By 1999, the translocated animals increased 25%, and restoration efforts will continue in many of the remaining sites.

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Wildlife habitats in managed rangelands—The Great Basin of southeastern Oregon.

Cited by 23 publications

References 22 publications

Test of a Modified Habitat Suitability Model for Bighorn Sheep

Test of a Modified Habitat Suitability Model for Bighorn Sheep

Holocene artiodactyl population histories and large game hunting in the Wyoming Basin, USA

Restoration of Bighorn Sheep Metapopulations in and Near Western National Parks

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