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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/2595

Title: POPULATION ESTIMATE AND STRUCTURE OF THE GELADA BABOON, Theropithecus gelada, IN THE GUASSA COMMUNITY CONSERVATION AREA, CENTRAL ETHIOPIA
Authors: HAILU, BEYENE
Advisors: Dr. TILAYE WUBE
Keywords: Population census and t0tal count
OMU
Guassa area
Gelada baboon
Conservation threats
Band
AMG
Copyright: Jun-2010
Date Added: 4-May-2012
Publisher: AAU
Abstract: Guassa area has a total area of 111km 2. Before the present study, no comprehensive census of geladas in the Guassa area had been carried out. The method used to census geladas living at Guassa was a total count. In addition, the age-sex structure of the geladas, the number of one male units (OMUs) per band, the size and composition of OMU and all male group (AMG), in the gelada population were investigated. A total of 1506 and 1543 geladas were counted during wet and dry seasons respectively. The adult sex ratio for both wet and dry seasons was 1:2.8 in favour of females. When the bachelors were excluded from the analysis, there were 4.1 adult females for each adult male. The ratio of sub adults, young, and infants to adults was 1:1.2. The ratio of adult females to infants was 1:2.5. With regard to the number of OMUs per band, there were 18.0 and 18.4 during wet and dry seasons respectively. The mean OMU size during the wet season was 12.15 of which 4.13 were adult females, 0.66 were sub-adult males,1.92 sub adult females, 2.64 young and 1.70 infants. During the dry season, the mean OMU size was 1166 which was composed of 4.12 adult females, 0.59 sub-adult males, 1.93 sub adult females, 2.50 young and 1.46 infants. The mean AMG size during the wet season was 6.41. During the dry season, the mean size of AMG was 6.23.. The ratio of AMGs to OMUs was 1:10.0 and 1: 10.5 during the wet and dry seasons respectively. Generally, there was no significant difference among the total population number, age-sex categories, and the number of OMUs per band, the size and composition of OMU and the size of AMG during dry and wet season. Though the actual size of the gelada population is significantly lower than the expected, based on previous unpublished report of Fashing and Nguyen, 2007, the overall condition of the current population does not appear to be in jeopardy. But there are many conservation threats such as habitat degradation, introduction of non-native plant species and harvesting/gathering, which are 7 directly or indirectly related with the growth of population in the area that will threat the future survival of the species.
URI: http://hdl.handle.net/123456789/2595
Appears in:Thesis - Biology

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