Unlike most bison in the west, which are managed as domestic livestock, yellowstone's population has thousands of animals that all exhibit wild behavior like their ancestors. they are exposed to predators, severe environmental conditions, and show no evidence of any interbreeding with cattle. the yellowstone bison are an essential part of a complex ecosystem that is much larger than the national park. it is the goal of the u. s. national park service to maintain this wild, migratory population of bison. management of the bison population in yellowstone national park has several facets. they include all but a) hunting inside yellowstone np. b) managed roaming outside yellowstone np. c) capture/slaughter for native american tribes. d) transfer of bison to other suitable locations outside the park.