Prey abundance and food habits of San Joaquin kit fox (Vulpes velox macrotis) at Camp Roberts Army National Guard Training site, California

Technical Report · Tue Sep 01 04:00:00 EDT 1992

OSTI ID:6616072

Logan, C G; Berry, W H; Standley, W G; Kato, T T

Prey abundance and food habits of the San Joaquin kit fox (Vulpes velox macrotis) were investigated at Camp Roberts Army National Guard Training site, California, from November 1988 through September 1991. The sampling methods initially used to assess abundance of prey species resulted in indices too low to be of value. Because of this, the relationship between relative abundance and frequency of occurrence of prey species could not be examined. Six hundred forty-nine fecal samples (scats) were analyzed to determine the frequency of occurrence of prey items. California ground squirrels (Spermophilus beecheyi) and lagomorphs primarily desert cottontails (Sylvilagus audubonii) and black-tailed jackrabbits (Lepus californicus) were the most frequently occurring mammalian prey items found in scats (35.0% and 12.2%, respectively). The frequency of occurrence of ground squirrel (but not lagomorph) remains in scats collected from juveniles was significantly higher than in scats collected from adults. The frequency of occurrence of ground squirrel and lagomorph remains in scats collected from males was not significant different than in scats collected from females. There were significant variations in the frequency of ground squirrel remains among the years 1989--1991 and during the June--November periods between 1989 and 1990 and between 1990 and 1991. The frequency of lagomorph remains collected during the June--November period differed significantly among the years 1989--1991 and between 1990 and 1991.

• Research Organization: EG and G Energy Measurements, Inc., Goleta, CA (United States). Santa Barbara Operations
• Sponsoring Organization: DOD; Department of Defense, Washington, DC (United States)
• DOE Contract Number: AC08-88NV10617
• OSTI ID: 6616072
• Report Number(s): EGG-10617-2158; ON: DE93011036
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
450600 -- Military Technology
Weaponry
& National Defense-- Chemical & Biological-- (1990)
54 ENVIRONMENTAL SCIENCES
540210* -- Environment
Terrestrial-- Basic Studies-- (1990-)
ANIMALS
BASELINE ECOLOGY
BIOLOGICAL MATERIALS
BIOLOGICAL WASTES
ECOLOGY
FECES
FOXES
MAMMALS
MATERIALS
MILITARY FACILITIES
PREDATOR-PREY INTERACTIONS
RABBITS
RODENTS
SQUIRRELS
VERTEBRATES
WASTES