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

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Kassahun Abie
Kassahun Abie
2
Afework Bekele
Afework Bekele
1 Wolkite University

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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

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No external funding was declared for this work.

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The authors declare no conflict of interest.

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Kassahun Abie. 2017. \u201cPopulation Estimate, Group Size and Age Structure of the Gelada Baboon (Theropithecus gelada) around Debre-Libanos, Northwest Shewa Zone, Ethiopia\u201d. Global Journal of Science Frontier Research - C: Biological Science GJSFR-C Volume 17 (GJSFR Volume 17 Issue C1): .

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GJSFR Volume 17 Issue C1
Pg. 27- 33
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Crossref Journal DOI 10.17406/GJSFR

Print ISSN 0975-5896

e-ISSN 2249-4626

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GJSFR-C Classification: FOR Code: 060799
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March 23, 2017

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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

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

Kassahun Abie
Kassahun Abie Wolkite University
Afework Bekele
Afework Bekele

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