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Analysis of California Condor (Gymnogyps Californianus) Use of Six Management Units Using Location Data from Global Positioning System Transmitters, Southern California, 2004-09-Initial Report - Open-File Report 2010-1287 (Paperback)
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Analysis of California Condor (Gymnogyps Californianus) Use of Six Management Units Using Location Data from Global Positioning System Transmitters, Southern California, 2004-09-Initial Report - Open-File Report 2010-1287 (Paperback)
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Loot Price R466
Discovery Miles 4 660
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This report provides an analysis of California Condor (Gymnogyps
californianus) space use of six management units in southern
California (Hopper Mountain and Bitter Creek National Wildlife
Refuges, Wildlands Conservancy-Wind Wolves Preserve, Tejon Mountain
Village Specific Plan, California Condor Study Area, and the Tejon
Ranch excluding Tejon Mountain Village Specific Plan and California
Condor Study Area). Space use was analyzed to address urgent
management needs using location data from Global Positioning System
transmitters. The U.S. Fish and Wildlife Service provided the U.S.
Geological Survey with location data (2004-09) for California
Condors from Global Positioning System transmitters and Geographic
Information System data for the six management units in southern
California. We calculated relative concentration of use estimates
for each management unit for each California Condor (n = 21) on an
annual basis (n = 39 annual home ranges) and evaluated resource
selection for the population each year using the individual as our
sampling unit. The most striking result from our analysis was the
recolonization of the Tejon Mountain Village Specific Plan,
California Condor Study Area, and Tejon Ranch management units
during 2008. During 2004-07, the home range estimate for two (25
percent) California Condors overlapped the Tejon Mountain Village
Specific Plan, California Condor Study Area, and Tejon Ranch
management units (n = 8), and use within the annual home range
generally was bimodal and was concentrated on the Bitter Creek and
Hopper Mountain National Wildlife Refuges. However, 10 (77 percent)
California Condor home ranges overlapped the Tejon Mountain Village
Specific Plan, California Condor Study Area, and Tejon Ranch
management units during 2008 (n = 13), and by 2009, the home range
of every condor carrying a Global Positioning System transmitter (n
= 14) overlapped these management units. Space use was multimodal
within the home range during 2008-09 and was
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