Kit Fox Population Trends at the Naval Petroleum Reserves in California
Conference
·
OSTI ID:5918329
- EG and G Energy Measurements, Inc., Las Vegas, NV (United States)
The San Joaquin kit fox was listed as an endangered subspecies following passage of the Endangered Species Protection Act of 1966, and further classified as rare under the California Endangered Species Act of 1970. The San Joaquin kit fox occurs on the Naval Petroleum Reserves in California administered by the Department of Energy (DOE). A long term kit fox population monitoring program was initiated as part of DOE's mitigation strategy to comply with the Endangered Species Act. In addition to monitoring kit fox populations, the program includes assessments of kit fox prey density and assessments of predator abundance. The objectives of this study were to: describe the long term changes in the kit fox population on the Reserves and assess the roles of coyotes and lagomorphs in kit fox population dynamics. When the fox population on NPR-1 declined between 1980 and 1984, it appeared to have been negatively impacted by a declining prey base (lagomorphs) and an increasing coyote population. Declining lagomorph densities may have been a more important factor because as coyote numbers declined between 1985 and 1990, the kit fox population remained stable. The fox population on NPR-2 remained at a higher and more stable level than the population on NPR-1. The factors determining the higher densities and greater stability of the fox population on NPR-2 are unknown.
- Research Organization:
- EG and G Energy Measurements, Inc., Las Vegas, NV (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC08-88NV10617
- OSTI ID:
- 5918329
- Report Number(s):
- EGG--10617-2088; CONF-9102105--1; ON: DE91010764
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020900* -- Petroleum-- Environmental Aspects
54 ENVIRONMENTAL SCIENCES
540250 -- Environment
Terrestrial-- Site Resource & Use Studies-- (1990-)
ANIMALS
CALIFORNIA
COYOTES
ENDANGERED SPECIES
ENVIRONMENTAL IMPACTS
FEDERAL REGION IX
FOXES
MAMMALS
MONITORING
NORTH AMERICA
PIKAS
POPULATION DENSITY
POPULATION DYNAMICS
PREDATOR-PREY INTERACTIONS
RABBITS
RESERVES
RESOURCES
RODENTS
STRATEGIC PETROLEUM RESERVE
USA
VERTEBRATES
020900* -- Petroleum-- Environmental Aspects
54 ENVIRONMENTAL SCIENCES
540250 -- Environment
Terrestrial-- Site Resource & Use Studies-- (1990-)
ANIMALS
CALIFORNIA
COYOTES
ENDANGERED SPECIES
ENVIRONMENTAL IMPACTS
FEDERAL REGION IX
FOXES
MAMMALS
MONITORING
NORTH AMERICA
PIKAS
POPULATION DENSITY
POPULATION DYNAMICS
PREDATOR-PREY INTERACTIONS
RABBITS
RESERVES
RESOURCES
RODENTS
STRATEGIC PETROLEUM RESERVE
USA
VERTEBRATES