Economic Importance for Humans: Negative
There are several negative economic impacts on humans. Where wild and domesticated B. grunniens live in close proximity to one another, wild yak have been known to break down fences. In some extreme circumstances, wild yaks have been known to kill domesticated yak (Buchholtz, 1990).
The possibility of the transmission of disease between domestic and wild B. grunniens is also a concern in areas where the two live fairly close to one another, and perhaps have limited contact (Schaller & Wulin, 1996).
Negative Impacts: causes or carries domestic animal disease