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Winter feeding of elk in the Greater Yellowstone Ecosystem and its effects on disease dynamics

Philosophical Transactions of the Royal Society B: Biological Sciences

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https://doi.org/10.1098/rstb.2017.0093

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Abstract

Providing food to wildlife during periods when natural food is limited results in aggregations that may facilitate disease transmission. This is exemplified in western Wyoming where institutional feeding over the past century has aimed to mitigate wildlife–livestock conflict and minimize winter mortality of elk (Cervus canadensis). Here we review research across 23 winter feedgrounds where the most studied disease is brucellosis, caused by the bacterium Brucella abortus. Traditional veterinary practices (vaccination, test-and-slaughter) have thus far been unable to control this disease in elk, which can spill over to cattle. Current disease-reduction efforts are being guided by ecological research on elk movement and density, reproduction, stress, co-infections and scavengers. Given the right tools, feedgrounds could provide opportunities for adaptive management of brucellosis through regular animal testing and population-level manipulations. Our analyses of several such manipulations highlight the value of a research–management partnership guided by hypothesis testing, despite the constraints of the sociopolitical environment. However, brucellosis is now spreading in unfed elk herds, while other diseases (e.g. chronic wasting disease) are of increasing concern at feedgrounds. Therefore experimental closures of feedgrounds, reduced feeding and lower elk populations merit consideration.

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Additional publication details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Winter feeding of elk in the Greater Yellowstone Ecosystem and its effects on disease dynamics
Series title:
Philosophical Transactions of the Royal Society B: Biological Sciences
DOI:
10.1098/rstb.2017.0093
Volume:
373
Year Published:
2018
Language:
English
Publisher:
The Royal Society
Contributing office(s):
Northern Rocky Mountain Science Center
Description:
Article 20170093; 9 p.
First page:
1
Last page:
9
Country:
United States
State:
Wyoming