Incorporating farmer observations in efforts to manage bovine tuberculosis using barrier fencing at the wildlife-livestock interface.

A federal and provincial cost-shared program was initiated in 2001 around Riding Mountain National Park in southwestern Manitoba, Canada to provide free game wire barrier fences for baled hay storage areas to prevent transmission of TB among cattle (Bos taurus), wild elk (Cervus elaphus), and deer (Odocoileus virginianus). Farmer observations of cervids on their farms were evaluated by interviewing 50 farmers that owned a game wire fence for >1 year. Of those interviewed, 82% reported some type of elk or deer damage to hay bales in the field or in their yard prior to fencing. After fencing, 23% of respondents reported some annual damage to stored hay bales that were not inside the fence, but there was a 100% decrease in the estimated annual value of hay losses. Incursions of deer inside the barrier fence were reported by 18% of respondents and most of these were due to leaving gates open. No incursions of elk inside a barrier fence were reported. Despite the important successes achieved, barrier fencing of hay bales alone does not completely protect cattle from bovine tuberculosis.