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Tracking the origins and diet of an endemic island canid (Urocyon littoralis) across 7300 years of human cultural and environmental change

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dc.contributor.author Hofman, Courtney A. en
dc.contributor.author Rick, Torben C. en
dc.contributor.author Maldonado, Jesús E. en
dc.contributor.author Collins, Paul W. en
dc.contributor.author Erlandson, Jon M. en
dc.contributor.author Fleischer, Robert C. en
dc.contributor.author Smith, Chelsea en
dc.contributor.author Sillett, T. S. en
dc.contributor.author Ralls, Katherine en
dc.contributor.author Teeter, Wendy en
dc.contributor.author Vellanoweth, René L. en
dc.contributor.author Newsome, Seth D. en
dc.date.accessioned 2016-09-01T17:50:09Z
dc.date.available 2016-09-01T17:50:09Z
dc.date.issued 2016
dc.identifier.citation Hofman, Courtney A., Rick, Torben C., Maldonado, Jesús E., Collins, Paul W., Erlandson, Jon M., Fleischer, Robert C., Smith, Chelsea, Sillett, T. S., Ralls, Katherine, Teeter, Wendy, Vellanoweth, René L., and Newsome, Seth D. 2016. "<a href="https://repository.si.edu/handle/10088/29315">Tracking the origins and diet of an endemic island canid (Urocyon littoralis) across 7300 years of human cultural and environmental change</a>." <em>Quaternary Science Reviews</em>. 146:147&ndash;160. <a href="https://doi.org/10.1016/j.quascirev.2016.06.010">https://doi.org/10.1016/j.quascirev.2016.06.010</a> en
dc.identifier.issn 0277-3791
dc.identifier.uri https://hdl.handle.net/10088/29315
dc.description.abstract Understanding how human activities have influenced the foraging ecology of wildlife is important as our planet faces ongoing and impending habitat and climatic change. We review the canine surrogacy approach (CSA) a tool for comparing human, dog, and other canid diets in the past and apply CSA to investigate possible ancient human resource provisioning in an endangered canid, the California Channel Islands fox (Urocyon littoralis). We conducted stable isotope analysis of bone collagen samples from ancient and modern island foxes (n = 214) and mainland gray foxes (Urocyon cinereoargenteus, n = 24). We compare these data to isotope values of ancient humans and dogs, and synthesize 29 Accelerator Mass Spectrometry (AMS) radiocarbon dates that fine-tune the chronology of island foxes. AMS dates confirm that island foxes likely arrived during the early Holocene (&gt;7300 cal BP) on the northern islands in the archipelago and during the middle Holocene (&gt;5500 cal BP) on the southern islands. We found no evidence that island foxes were consistently using anthropogenic resources (e.g., food obtained by scavenging around human habitation sites or direct provisioning by Native Americans), except for a few individuals on San Nicolas Island and possibly on San Clemente and Santa Rosa islands. Decreases in U. littoralis carbon and nitrogen isotope values between prehistoric times and the 19th century on San Nicolas Island suggest that changes in human land use from Native American hunter-gatherer occupations to historical ranching had a strong influence on fox diet. Island foxes exhibit considerable dietary variation through time and between islands and have adapted to a wide variety of climatic and cultural changes over the last 7300 years. This generalist foraging strategy suggests that endemic island foxes may be resilient to future changes in resource availability. en
dc.relation.ispartof Quaternary Science Reviews en
dc.title Tracking the origins and diet of an endemic island canid (Urocyon littoralis) across 7300 years of human cultural and environmental change en
dc.type Journal Article en
dc.identifier.srbnumber 140120
dc.identifier.doi 10.1016/j.quascirev.2016.06.010
rft.jtitle Quaternary Science Reviews
rft.volume 146
rft.spage 147
rft.epage 160
dc.description.SIUnit NH-Anthropology en
dc.description.SIUnit NH-Invertebrate Zoology en
dc.description.SIUnit NMNH en
dc.description.SIUnit NZP en
dc.description.SIUnit Peer-reviewed en
dc.citation.spage 147
dc.citation.epage 160

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