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Even Substantially Higher Harvest Was Not Projected to Reduce Arctic Norway’s Red Fox Population

Red fox walking across autumn tundra
Conservation · Management

A study published in 2026 used an integrated population model to examine how harvest and natural demographic processes affect an expanding population of red foxes (Vulpes vulpes) in Arctic Norway. The population fluctuated strongly from year to year, and forward projections indicated that current harvest levels were likely sufficient to prevent long-term population increase. Even substantial increases in harvest, however, did not produce a projected population decline.

Researchers combined data on age, reproductive status and genetic similarity from more than 4,000 harvested red foxes with opportunistic field observations and information published on red foxes elsewhere. The model covered a 20-year period and was used both to identify the processes driving past changes in population growth and to project outcomes under different harvest regimes.

Natural mortality and immigration drove annual fluctuations

Changes in natural mortality and immigration were the main causes of annual fluctuations in population size. Both responded to rodent prey availability and fox density. The authors found strong density-dependent buffering, particularly through immigration, which compensated for losses as harvest pressure increased.

In the forward projections, present harvest levels were likely enough to keep the population from increasing over longer periods, but substantially higher harvest still failed to generate a decline. The authors developed the workflow to support mesopredator management and note that it can be rerun when new monitoring and harvest data become available.

Sources and image credit

  1. Nater, C. R., Hofhuis, S. P., Grainger, M., Flagstad, Ø., Ims, R. A., Killengreen, S., & Ehrich, D. (2026). An integrated population modeling workflow for supporting mesopredator management. Ecological Applications, 36(3), e70153. https://doi.org/10.1002/eap.70153Primary research article first published 1 April 2026. The integrated population model combined data on age, reproductive status and genetic similarity from more than 4,000 harvested red foxes with opportunistic observations across 20 years in Arctic Norway. Annual population fluctuations were driven by natural mortality and immigration responding to rodent prey availability and fox density. Current harvest was projected to prevent long-term growth, but even substantially higher harvest did not produce population decline because of density-dependent buffering, especially immigration.

Image: Emkmiller100 — red fox (Vulpes vulpes) on autumn tundra at Churchill, Manitoba, Canada, photographed 3 October 2019; Wikimedia Commons; representative Arctic-habitat image, not a fox from the Norway study · CC BY-SA 4.0 · Source

About this content: This story was produced with AI assistance within an editorial workflow developed by Wildlife Vagabond. Editorial responsibility remains with Wildlife Vagabond.How AI is used

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