Population Dynamics and Movement Patterns of Bighorn Sheep Reintroduced in the Sierra Nevada, California PDF Download
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Author: Leslie Stephen Chow
Publisher:
ISBN:
Category : Bighorn sheep
Languages : en
Pages : 340
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Author: Leslie Stephen Chow
Publisher:
ISBN:
Category : Bighorn sheep
Languages : en
Pages : 340
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Author: John David Wehausen
Publisher:
ISBN:
Category : Animal populations
Languages : en
Pages : 486
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Author:
Publisher:
ISBN:
Category : Environmental monitoring
Languages : en
Pages : 166
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Author: Gretchen Irene Fowles
Publisher:
ISBN:
Category : Animal populations
Languages : en
Pages : 206
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Translocations of bighorn sheep have had variable success due to the lack of good quality, predictive habitat models and of regular follow-up monitoring of translocated populations. This research helps to fill these voids. Radio telemetry was used to estimate the habitat use of a newly reintroduced population of California bighorn sheep (Ovis canadensis californiana) on the Jim Sage Range in Idaho. The habitat characteristics of locations used by groups of sheep were compared to those of randomly selected locations over two different geographic scales by use of GIS and logistic regression. The characteristics included vegetative composition, terrain ruggedness, distance to water sources, distance to steep slopes, slope, aspect, and elevation. Predictive habitat selection models based on winter, lambing, and summer habitat use were developed. The habitat models correctly classified 78-82% of used locations. Open grassy areas, distance to steep slopes and water, high elevation, and rugged terrain significantly contributed to the presence of sheep. The models suggested that there is an adequate amount of suitable habitat to support a viable population on the Jim Sage Range but that barriers may prevent their access to a portion of the range. Characteristics of the population, including births, deaths, movement patterns, and group composition and size were also monitored so that baseline data with which to compare future data to evaluate the status of the population would be provided. Adequate lambing and recruitment rates were observed. Twenty-two deaths occurred since the first translocation, and mountain lions were a major cause of these. Most of the mountain lion kills occurred during the first four months after the first release. Group size varied seasonally and was positively affected by population density.
Author: Esther Salzmann Rubin
Publisher:
ISBN:
Category :
Languages : en
Pages : 438
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Author: Peggy Eileen Moore
Publisher:
ISBN:
Category : Bighorn sheep
Languages : en
Pages : 242
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 996
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Author: United States. National Park Service
Publisher:
ISBN:
Category : National parks and reserves
Languages : en
Pages : 480
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Author: Gary M. Fellers
Publisher:
ISBN:
Category : Amphibian populations
Languages : en
Pages : 134
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Author: James R. De Forge
Publisher:
ISBN:
Category : Bighorn sheep
Languages : en
Pages : 266
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