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US93 Bighorn Sheep Study: Distribution and Trans-Highway Movements of Desert Bighorn Sheep in Northwestern Arizona.
| 题名： | US93 Bighorn Sheep Study: Distribution and Trans-Highway Movements of Desert Bighorn Sheep in Northwestern Arizona. |
| 作者： | T. McKinney; T. Smith; |
| 关键词： | wildlife managment,sheep,highways,desert bighorn sheep/arizona, monitoring, underpasses, animal populations, animal distribution, accident prevention, connectivity, permeability, telemetry, terrain/arizona, monitoring, underpasses, animal populations, animal distribution, accident prevention, connectivity, permeability, telemetry, terrain |
| 摘要： | Desert bighorn sheep were monitored via satellite telemetry, ground observations, and track beds between 2004 and 2006, primarily to determine distribution and movements relative to mileposts (MP) 3 to 17 of U.S. Highway 93 in the Black Mountains of northwestern Arizona. Bighorns were distributed and moved throughout the study area, but locations of trans-highway movements were not random. Construction of a highway bypass structure between MP 0 and 3 had no apparent effects on permeability of the right-of-way corridor to bighorns. Bighorns concentrated trans-highway movements in the area of proposed highway realignments between MP 3 and 17 at five locations. The research team identified five continuous, linear, elevated guideways (ridgelines) in this area where bighorns concentrated trans-highway movements. Specifically, these ridgelines were located near MP 3.3, 5.1, 7.7, 12.2, and 15.3. Eighty-two percent of highway crossings between MP 3 and 17 occurred near ridgelines at MP 3.3, 5.1, and 12.2, and the research team concluded highway crossing structures at these locations likely would promote highway permeability at a level ensuring genetic heterogeneity and vigor of the resident desert bighorn sheep population. / Title Note: Final rept. / Supplementary Notes: Sponsored by Arizona Dept. of Transportation, Phoenix. and Federal Highway Administration, Phoenix, AZ. Arizona Div. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5301 Shawnee Road, Alexandria, VA, 22312, USA. / NTIS Prices: PC A05 / Monitor Agency Acronym: FHWA / Monitor Agency Number: AZ-07-576 / Corporate Author Code: 061495000 / Classifivation: Unclassified report |
| 报告类型： | 科技报告 |
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