Occupancy, habitat, and abundance of the Sacramento Valley red fox

Kathleen M. Black, Sophie Preckler-Quisquater, Tom J. Batter, Stacy Anderson, Benjamin Sacks

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The Sacramento Valley red fox (Vulpes vulpes patwin) is a native subspecies of conservation need endemic to the northern portion of California's Central Valley, USA. We conducted an occupancy survey to investigate habitat use and obtain a crude, range-wide estimate of abundance. We used 2 previously developed red fox distribution models based on presence-only data to stratify sampling of 107 sites with baited cameras for ≥90 days during March 2013–June 2016, resulting in red fox detections at 30 sites. All detections occurred in 1 of the 93 sites where 1 or both previous presence-only models predicted occurrence. Red fox occurrence was positively associated with dry agriculture, human development, and proximity to grassland, and negatively associated with wetlands and flooded agriculture. The models predicted that 34.21% of the 12,000-km2 Sacramento Valley landscape contained red foxes, which we estimate corresponded to approximately 1,600 breeding individuals. This estimate is comparable to that of the federally endangered California San Joaquin kit fox (Vulpes macrotis mutica), underscoring its potential vulnerability and conservation need. Targeted efforts to enhance its habitat, such as juxtaposition of grassland patches with agricultural and rural residential structures through conservation easements, could benefit conservation of the Sacramento Valley red fox.

Original languageEnglish (US)
JournalJournal of Wildlife Management
DOIs
StateAccepted/In press - Jan 1 2018

Fingerprint

Vulpes vulpes
valleys
valley
habitat
habitats
grassland
agriculture
habitat use
subspecies
grasslands
vulnerability
Vulpes
Central Valley of California
wetland
breeding
human development
foxes
cameras
sampling
wetlands

Keywords

  • California
  • habitat
  • occupancy
  • Sacramento Valley red fox
  • threatened and endangered species
  • Vulpes vulpes patwin

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Nature and Landscape Conservation

Cite this

Occupancy, habitat, and abundance of the Sacramento Valley red fox. / Black, Kathleen M.; Preckler-Quisquater, Sophie; Batter, Tom J.; Anderson, Stacy; Sacks, Benjamin.

In: Journal of Wildlife Management, 01.01.2018.

Research output: Contribution to journalArticle

Black, Kathleen M. ; Preckler-Quisquater, Sophie ; Batter, Tom J. ; Anderson, Stacy ; Sacks, Benjamin. / Occupancy, habitat, and abundance of the Sacramento Valley red fox. In: Journal of Wildlife Management. 2018.
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