Hooves, tails, and bones are used as components of medicines. Heads are valued as trophies. Reducing the levels of poaching would increase adult survival. Older adults are not desireable to the poachers. Poaching can be reduced through the use of armed game wardens protecting the herds at all times.
Costs are moderate.
Hiring, training, and paying a sufficient number of game wardens is significant, although locals can be used, requiring substantially less pay. Increasing the survival of the oldest adults. Under ideal conditions, survival of elderly adults can be significantly increased. Elderly adults usually die of disease or starvation during the winter months. Protecting the elderly from severe conditions can significantly increase their survival.