The distribution of baboon species and a new population of gelada baboons along the Wabi-Shebeli river, Ethiopia
The distribution of baboon species and a new population of gelada baboons along the Wabi-Shebeli river, Ethiopia
复制标题
埃塞俄比亚瓦比-谢贝利河沿岸狒狒物种和狒狒新种群的分布
作者：
A. Mori;G. Belay
我们进行了广泛的调查，以寻找介于papio hamadryas和p之间的杂交狒狒。沿着阿鲁西和贝尔地区边界的瓦比-谢贝利河的阿努比斯。我们向路边的村民询问狒狒物种的存在情况。我们还在几个地点进行了直接观察。通往Wabi-Shebeli河北岸（Arusi地区）有三条路线，其中两条路线在Wabi-Shebeli河岸边发现了杂交狒狒。我们在悬崖地区的三条路线上都发现了hamadryas狒狒。有两条路线通往瓦比-谢贝利河南岸（贝尔地区）。我们对其中之一进行了调查。我们在路线的悬崖地区发现了hamadryas狒狒。我们观察到沿Wabi-Shebeli河（Arusi地区）北岸延伸20多公里的悬崖上有一个狒狒种群。这一地区远位于已知狒狒分布范围的南部（Yalden et al., 1977）。根据我们在这两个地区的观察，该地区的狒狒似乎与在Debre Sina（昭和地区）的狒狒代表不同的形式（亚种）。研究认为，瓦比-谢贝利河流域狒狒种群分布可能受到高原集约化耕作的强烈影响。研究了三种狒狒的分布格局。anubis、P. hamadryas和theropithecus gelada似乎受到它们对悬崖环境的个体适应性的影响。Hamadryas狒狒沿着瓦比-谢贝利河的悬崖和狭窄的低地连续分布。阿努比斯狒狒在山崖上的分布是不连续的，种群数量倾向于小而孤立。这些anubis狒狒与hamadryas狒狒杂交强烈。
We conducted an extensive survey in search of hybrid baboons betweenPapio hamadryas andP. anubis along the Wabi-Shebeli river at the border of the Arusi and Bale Regions, Ethiopia. We made inquiries of villagers on the roadsides concerning the existence of baboon species. We also conducted direct observations at several sites. There are three routes which lead to the north bank of the Wabi-Shebeli river (Arusi Region), and we found hybrid baboons on the bank of the Wabi-Shebeli river in two routes among the three. We found hamadryas baboons in all of the three routes at the cliff areas. There are two routes which lead to the south bank of the Wabi-Shebeli river (Bale Region). We conducted a survey on one of the two. We found hamadryas baboons at the cliff areas of the route.We observed a population of gelada baboons along the cliff extending over 20 km along the north bank of the Wabi-Shebeli river (Arusi Region). This area is far to the south of the known distribution range of gelada baboons (Yalden et al., 1977). The gelada baboons of this area appeared to represent a different form (subspecies?) from those at Debre Sina (Showa Region) based on our observations in both areas.We reached the conclusion that the distributions of baboon species along the Wabi-Shebeli river may have been strongly affected by the intensive cultivation on the plateau of the highland. The distribution patterns of the three baboon species,P. anubis, P. hamadryas, andTheropithecus gelada, appeared to be influenced by their individual adaptabilities to the cliff environment. Hamadryas baboons were distributed continuously along the cliff and the narrow lowland of the Wabi-Shebeli river. Anubis baboons were distributed discontinuously on the cliffs, and their populations tended to be small and isolated. These anubis baboons were strongly hybridized with hamadryas baboons.