Institute of Ecology, University of California, Davis.
Desert Ecological Research Unit, Gobabeb, Namibia.
Am J Primatol. 1982;2(2):149-158. doi: 10.1002/ajp.1350020203.
Solitary and paired adult (nine) and subadult (one) male chacma baboons, Papio ursinus, were observed over a period of years living in part of a wooded desert canyon not used by adjacent troops. These extratroop males were silent when alone and gave only one alarm vocalization, the "wa-hoo" call, when paired. The space occupied by them is unsuitable for use by troops according to criteria for adequate sleeping sites and access to water. But the foods available to them, especially figs, but also other fruits and fresh acacia seeds, were abundant. These foods are more highly preferred by baboons than those foods available to troop members. Troop members deplete these resources and shift to less preferred foods with lower water content and longer processing times. All of the adult members of the troop adjacent to these isolated males were infected with a skin disease. Isolated males were not so afflicted and so cannot have originated from, or ever been a part of, this troop. They probably moved to the space where they were observed from other inland troops, traveling to their current home range along the narrow canyon river course.
多年来，人们观察到生活在一个未被相邻部队使用的树木繁茂的沙漠峡谷部分的独居和成对的成年（九只）和亚成年（一只）雄性狒狒，狒狒。这些非部队雄性在独处时保持沉默，只有在成对时才发出一声警报叫声，即“wa-hoo”叫声。根据充足的睡眠地点和水源标准，它们占据的空间不适合部队使用。但是，它们可获得的食物，特别是无花果，但也有其他水果和新鲜金合欢种子，非常丰富。这些食物比部队成员可获得的食物更受狒狒的喜爱。部队成员消耗了这些资源，并转移到水分含量较低、加工时间较长的不太受欢迎的食物上。与这些孤立雄性相邻的部队的所有成年成员都感染了一种皮肤病。孤立的雄性没有受到这种影响，因此不可能来自或曾经是这个部队的一部分。它们可能是从其他内陆部队迁移到它们被观察到的地方，沿着狭窄的峡谷河道前往它们目前的家域。
