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23 March 2021 Gifts of an enemy: scavenging dynamics in the presence of wolves (Canis lupus)
Kaija J. Klauder, Bridget L. Borg, Kelly J. Sivy, Laura R. Prugh
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Carrion represents an important resource for carnivores. Examining competition for carrion in a risk–reward framework allows for a better understanding of how predator guilds compete for and benefit from carrion. We used trail camera data to compare wintertime carrion use and vigilance behavior of four carnivores in Denali National Park and Preserve. We found that carrion use was dominated by wolves (Canis lupus) and wolverines (Gulo gulo), followed by red foxes (Vulpes vulpes) and coyotes (Canis latrans). Wolves and wolverines were twice as likely to visit a carcass as foxes and coyotes, and their visits were longer and more numerous. Our results suggest scavenging animals reduced their risk exposure primarily by reducing their use of carrion, with some evidence of increased vigilance at busy sites. We found that carrion use and behavior at carcass sites were influenced by the mortality type of the carcass, the age of the carcass, and the long-term intensity of wolf use in the area. Our results also suggest that wolves are the “top scavenger,” and indicate that intraguild competition for carrion strongly affects which species benefit from carrion, with larger and more aggressive species dominating.

© The Author(s) 2021. Published by Oxford University Press on behalf of the American Society of Mammalogists,
Kaija J. Klauder, Bridget L. Borg, Kelly J. Sivy, and Laura R. Prugh "Gifts of an enemy: scavenging dynamics in the presence of wolves (Canis lupus)," Journal of Mammalogy 102(2), 558-573, (23 March 2021).
Received: 27 February 2019; Accepted: 9 February 2021; Published: 23 March 2021
Camera trap
Canis lupus
interspecific competition
risk allocation hypothesis
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