Survival and cause‐specific mortality of gray foxes ( Urocyon cinereoargenteus ) in southern California
Abstract
From May 1997 to July 1999, 24 gray foxes Urocyon cinereoargenteus were radio-marked and their fates monitored in a natural area of southern California to identify rates of survival and cause-specific mortality, and thus to assess population sustainability. Pup (0.4–1.0 years old) foxes had an 8-month (September–April) survival rate (0.34) that was lower than the 8-month (0.77) or 12-month (0.58) estimates for adult foxes. Interference competition was evident; 92% (11/12) of fox mortalities were the result of predation by sympatric coyotes Canis latrans or bobcats Felis rufus. Also, five of seven gray fox mortalities were outside of, or on the border of, the home range of the killed fox. Calculations indicated that the fox population would remain stable if survival of pups during their first 4 months of life was 0.68 (vs 0.75 for adults during these months and 0.58 for older pups for 4 other months). This seems reasonable, yet sympatric carnivores, mainly coyotes, clearly influence the gray fox population in southern California.
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Coyotes may kill foxes.
“Coyotes, in turn, may kill foxes (Sargeant & Allen 1989;Farias et al. 2005;Gosselink et al. 2007).”
From A continental scale trophic cascade from wolves through coyotes to foxes (2015) · cites this paper as Farias et al. 2005
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A continental scale trophic cascade from wolves through coyotes to foxes
Newsome, T. M., & Ripple, W. J. (2015) · Journal of Animal Ecology · doi:10.1111/1365-2656.12258 · Cited by 184 · see citing works
- Authors
- Farias, V., Fuller, T. K., Wayne, R. K., & Sauvajot, R. M.
- Affiliations
- Department of Natural Resources Conservation, 160 Holdsworth Way, University of Massachusetts, Amherst, MA 01003‐9285, U.S.A.
- University of Massachusetts Amherst (US)
- University of California, Los Angeles (US)
- National Park Service (US)
- Corresponding author
- Fuller, Todd K.
- Venue
- Journal of Zoology
- Publisher
- Wiley
- Published
- 2005-07
- Volume
- 266
- Issue
- 3
- Pages
- 249-254
- ISSN
- 0952-8369 (ISSN-L)
- 1469-7998
- OpenAlex
- W1981350810
- Cited by
- 74
- References
- 0
- Citations by year
- 2026: 4 · 2025: 4 · 2024: 1 · 2023: 8 · 2022: 8 · 2021: 6 · 2020: 4 · 2019: 6 · 2017: 3 · 2016: 2 · 2015: 4 · 2014: 4 · 2013: 2 · 2012: 2
- FWCI
- 2.50
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Journal of Zoology (publishedVersion)
- Scholarworks (University of Massachusetts Amherst) (submittedVersion)
- Topics
- Physical Sciences › Environmental Science › Ecology › Wildlife Ecology and Conservation
- Physical Sciences › Environmental Science › Ecology › Animal Ecology and Behavior Studies
- Physical Sciences › Environmental Science › Ecology › Rangeland and Wildlife Management
- Keywords
- gray fox, Urocyon cinereoargenteus, survival rate, cause-specific mortality, pup survival, interference competition, coyote predation, sympatric carnivores, population sustainability, home range, Southern California
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