Population Estimate, Group Size and Age Structure of the Gelada Baboon (Theropithecus gelada) around Debre-Libanos, Northwest Shewa Zone, Ethiopia

Kassahun Abie; Afework Bekele

Authors

Kassahun Abie
Afework Bekele

gelada baboon, population estimate, group size, debre-libanos

Abstract

Most of the gelada baboon's population which is endemic to Ethiopia exists on the gorges and mountain cliffs of the country including Debre-Libanos. The objective of the study was to estimate the total gelada baboons, and determine their group size and age structure. This was investigated based on direct field observation method from August 2012 to March 2013. The study area was divided into seven counting blocks (Shinkurt Mikael, Chagel, Amanuel, Abba Dinkona, Wusha Gedel, Tekle Haimanot, and Set Debre). Data were analyzed using descriptive statistics. Chi-square test was used to compare the sex and age ration, and their distribution among the counting blocks. The population size of gelada baboons was determined from direct total count. The average number of gelada baboons counted was 1608. Of these, adult males comprised 162, adult females 576, sub-adult males 121, sub-adult females 231, young 307 and infants 212. There was a significant difference among the different age groups of the total individuals counted in the study area (χ2=1002.657, df=5, p

Downloads

How to Cite

Population Estimate, Group Size and Age Structure of the Gelada Baboon (Theropithecus gelada) around Debre-Libanos, Northwest Shewa Zone, Ethiopia. (2017). Global Journal of Science Frontier Research, 17(C1), 27-33. https://www.journalofscience.org/index.php/GJSFR/article/view/1978

Download Citation

References

Habtamu Asfafaw, C Subramanian (2013) Population size and structure of gelada baboon (Theropithecus gelada) in Simien mountains national park, Ethiopia. 2, 102-106.

J Beehner, T Birhanugebre, C Bergman, Mccann (2008) Population estimate for geladas (Theropithecus gelada) living in and around the Simien Mountains National Park, Ethiopia. 30, 149-154.

Befekadu Refera, Afework Bekele (2004) Population status and structure of mountain nyala in the Bale Mountains National Park, Ethiopia. 42(1), 1-7.

G Caughley, A Sinclair (1994) Wildlife Ecology and Management.

R Dunbar (1998) Impact of global warming on the distribution and survival of the gelada baboon: a modelling approach. 4(3), 293-304.

R Estes (1974) Social organization of the African Bovidae.In: The behavior of ungulates and its relation to management. 166-205.

Hailu Beyene (2010) Population estimate and structure of the gelada baboon, Theropithecus gelada, in the guassa community conservation area, central Ethiopia.

Abebe M. Aga, Demise Mulugeta, Atsbeha Gebreegziabxier, Jemal Mohammed, Anberber Alemu, Yewenshet Tesera, Frehiwot Mulugeta, Bedasa Gidisa, Jaleta Bulti, Gemechu Tadesse, Dereje Nigussei (1993) The Impact of Vaccination on RT-PCR Cycle Threshold Values for COVID-19: Insights for Future Pandemic Preparedness. I, 01-07.

S Hirst (1975) Ungulate-habitat relationship in a South African woodland/savanna ecosystem. 44, 1-60.

Toshitaka Iwamoto (1993) The ecology of Theropithecus gelada. 441-452.

J Kingdon (1997) The Kingdon Field Guide to African Mammals.

Michael Kutilek (1979) Forage-Habitat Relations of Nonmigratory African Ungulates in Response to Seasonal Rainfall. 43(4), 899.

J Lewis, R Wilson (1979) The ecology of Swayne's Hartebeest. 15, 1-12.

A Mori, Gurja Belay (1990) The distribution of baboon species and a new population of gelada baboons along the Wabi-Shebeli River, Ethiopia. 31, 495-508.

Akio Mori, Toshitaka Iwamoto, Umeyo Mori, Afework Bekele (1999) Sociological and demographic characteristics of a recently found arsi gelada population in ethiopia. 40(2), 365-381.

Mussa Adem (2009) Population status of gelada baboon and human -wildlife conflict in and around Denkoro forest, Ethiopia. 45-54.

B Nievergelt (1981) Ibexes in an African Environment.

Joyce Kedemi, Rosemary Mbogo, Edward Aligula (1978) Women in Higher Education Leadership. 75-112.

J Oates (1996) African primates: Status survey and conservation action plan.

K Siex, T Struhsaker (1999) Colobus monkey and coconutsia study of perceived human-wildlife conflicts. 36, 1009-1020.

W Sutherland (1996) Ecological Census Techniques.