SUDDEN INCREASE IN A RARE ENDEMIC CARNIVORE: ECOLOGY OF THE ISLAND SPOTTED SKUNK.

Item request has been placed! ×
Item request cannot be made. ×
loading   Processing Request
  • معلومة اضافية
    • Subject Terms:
    • Author-Supplied Keywords:
      Channel Islands
      competitive release
      interference competition
      intraguild predation
      island fox
      island recovery
      radiotelemetry
      Spilogale gracilis
      Urocyon littoralis
    • Abstract:
      The island spotted skunk (Spilogale gracilis amphiala), an insular endemic carnivore, recently increased unexpectedly from rarity to abundance on Santa Cruz Island, California. Two explanations have been proposed for this striking increase: competitive release due to decline of the island fox (Urocyon littoralis santacruzae) and vegetative recovery due to removal of feral livestock. To examine the causes and consequences of the increase, we assessed abundance, body mass, home-range size, spatial resource use (den sites and habitat use), temporal resource use, and diet of island spotted skunks during abundance in 2003-2004 and compared it with similar measures during rarity in 1992. Capture success of skunks increased exponentially from 1992 to 2004 (r = 0.38), leading to extraordinarily high densities (9-19 individuals/km²). Both body mass and home-range size remained unchanged, suggesting that per capita resource abundance was not higher in 2003-2004 compared to 1992. We found modest shifts in habitat use, diet, and possibly diurnal activity, providing some support for release from exploitative competition as an explanation for the increase. However, there was a marked shift in den selection, toward unprotected dens and away from multiple use, that is not likely attributable to either release from exploitative competition or to island recovery. Thus, our results suggest that, although both of these processes have likely played a role, release from interference competition also may be a factor behind the dramatic increase in number of skunks. Skunks on Santa Cruz Island may be nearing or even exceeding carrying capacity, and the future of the population and its effects on the endangered island fox remain unclear. [ABSTRACT FROM AUTHOR]
    • Abstract:
      Copyright of Journal of Mammalogy is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
    • Author Affiliations:
      1Department of Wildlife, Fish, and Conservation Biology, University of California-Davis, One Shields Avenue, Davis, CA 95616, USA
      2Department of Fish, Wildlife, and Conservation Biology, Colorado State University, 115 Wagar, Fort Collins, CO 80523, USA
    • ISSN:
      0022-2372
    • Accession Number:
      10.1644/07-MAMM-A-034.1
    • Accession Number:
      31504211
  • Citations
    • ABNT:
      JONES, K. L.; VAN VUREN, D. H.; CROOKS, K. R. Sudden Increase in a Rare Endemic Carnivore: Ecology of the Island Spotted Skunk. Journal of Mammalogy, [s. l.], v. 89, n. 1, p. 75–86, 2008. DOI 10.1644/07-MAMM-A-034.1. Disponível em: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=asn&AN=31504211&custid=s8280428. Acesso em: 16 fev. 2020.
    • AMA:
      Jones KL, Van Vuren DH, Crooks KR. Sudden Increase in a Rare Endemic Carnivore: Ecology of the Island Spotted Skunk. Journal of Mammalogy. 2008;89(1):75-86. doi:10.1644/07-MAMM-A-034.1.
    • APA:
      Jones, K. L., Van Vuren, D. H., & Crooks, K. R. (2008). Sudden Increase in a Rare Endemic Carnivore: Ecology of the Island Spotted Skunk. Journal of Mammalogy, 89(1), 75–86. https://doi.org/10.1644/07-MAMM-A-034.1
    • Chicago/Turabian: Author-Date:
      Jones, Krista L., Dirk H. Van Vuren, and Kevin R. Crooks. 2008. “Sudden Increase in a Rare Endemic Carnivore: Ecology of the Island Spotted Skunk.” Journal of Mammalogy 89 (1): 75–86. doi:10.1644/07-MAMM-A-034.1.
    • Harvard:
      Jones, K. L., Van Vuren, D. H. and Crooks, K. R. (2008) ‘Sudden Increase in a Rare Endemic Carnivore: Ecology of the Island Spotted Skunk’, Journal of Mammalogy, 89(1), pp. 75–86. doi: 10.1644/07-MAMM-A-034.1.
    • Harvard: Australian:
      Jones, KL, Van Vuren, DH & Crooks, KR 2008, ‘Sudden Increase in a Rare Endemic Carnivore: Ecology of the Island Spotted Skunk’, Journal of Mammalogy, vol. 89, no. 1, pp. 75–86, viewed 16 February 2020, .
    • MLA:
      Jones, Krista L., et al. “Sudden Increase in a Rare Endemic Carnivore: Ecology of the Island Spotted Skunk.” Journal of Mammalogy, vol. 89, no. 1, Feb. 2008, pp. 75–86. EBSCOhost, doi:10.1644/07-MAMM-A-034.1.
    • Chicago/Turabian: Humanities:
      Jones, Krista L., Dirk H. Van Vuren, and Kevin R. Crooks. “Sudden Increase in a Rare Endemic Carnivore: Ecology of the Island Spotted Skunk.” Journal of Mammalogy 89, no. 1 (February 2008): 75–86. doi:10.1644/07-MAMM-A-034.1.
    • Vancouver/ICMJE:
      Jones KL, Van Vuren DH, Crooks KR. Sudden Increase in a Rare Endemic Carnivore: Ecology of the Island Spotted Skunk. Journal of Mammalogy [Internet]. 2008 Feb [cited 2020 Feb 16];89(1):75–86. Available from: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=asn&AN=31504211&custid=s8280428