Dental evidence for variation in diet over time and space in the Arctic fox, Vulpes lagopus

Studies of the effects of variation in resource availability are important for understanding the ecology of high-latitude mammals. This paper examines the potential of dental evidence (tooth wear and breakage) as a proxy for diet and food choice in Vulpes lagopus, the Arctic fox. It presents a preli...

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Bibliographic Details
Published in:Polar Biology
Main Authors: Ungar, Peter S., Van Valkenburgh, Blaire, Peterson, Alexandria S., Sokolov, Aleksandr A., Sokolova, Natalya A., Ehrich, Dorothee, Fufachev, Ivan A., Gilg, Olivier, Terekhina, Alexandra, Volkovitskiy, Alexander, Shtro, Victor
Format: Article in Journal/Newspaper
Language:English
Published: Springer 2021
Subjects:
Arctic
Yamal Peninsula
Arctic Fox
Polar Biology
Vulpes lagopus
Online Access:https://hdl.handle.net/10037/24465
https://doi.org/10.1007/s00300-021-02821-8
Description
Summary:Studies of the effects of variation in resource availability are important for understanding the ecology of high-latitude mammals. This paper examines the potential of dental evidence (tooth wear and breakage) as a proxy for diet and food choice in Vulpes lagopus, the Arctic fox. It presents a preliminary study of dental microwear, gross wear score, and tooth breakage in a sample (n = 78 individuals) from the Yamal Peninsula of the Russian Arctic. While these measures have each been associated with feeding ecology in larger carnivorans (e.g., proportion of bone in the diet), they have yet to be combined in any study and have rarely been applied to smaller species or those from high latitudes. Arctic foxes from the north and south of the peninsula, and those from rodent peak and trough density periods, are compared to assess impact of changes in food availability across space and time. Results indicate that microwear textures vary in dispersion, with more variation in texture complexity, including higher values (suggesting more consumption of bone), in the rodent-poor period in the north of Yamal. Gross wear scores and tooth breakage are also significantly higher for the north of Yamal than the south. These data together suggest that dental evidence can provide important insights into variation in the feeding ecology of Arctic foxes and potentially into the impacts of changes in food abundance across space and time.

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