California Pronghorn Mount Dome Annual Range

The Mount Dome pronghorn herd contains a mixture of residents and short distance, elevation-based migrants, but this herd does not migrate between traditional summer and winter seasonal ranges. Instead, much of the herd displays a somewhat nomadic migratory tendency, slowly moving up or down elevational gradients. Long distance movements from this herd are rare since it is largely surrounded by geographical and anthropogenic features with low permeability to movement. Some individuals used higher elevation areas throughout the summer, though this pattern was not ubiquitous. Therefore, annual home ranges were modeled using year-round data to demarcate high use areas (fig. XXX). Drought, increasing fire frequency, invasive annual grasses, and juniper encroachment negatively affect habitat for pronghorn. Agricultural development within Butte Valley has resulted in some loss of historic pronghorn habitat. Pronghorn have declined significantly from historic highs within this herd but have remained fairly stable at low numbers in recent years (Trausch and others, 2020). Juniper removal on public and private lands in the unit have potential to improve habitat quantity and quality (Ewanyk, 2020). These mapping layers show the location of the annual range for pronghorn (Antilocapra americana) in the Mount Dome population in California. They were developed from 12 annual range sequences collected from a sample size of 9 animals comprising GPS locations collected every 1-2 hours.

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  "010:12"
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[
  "geospatial"
]