Worku, Ejigu Alemayehu, Bro-Jorgensen, Jakob 
ORCID: 0000-0003-2899-8477, Evangelista, Paul H, Bekele, Afework, Atickem, Anagaw and Stenseth, Nils Chr
(2023)
Group size dynamics of the endangered mountain nyala (Tragelaphus buxtoni) in protected areas of the Arsi and Ahmar Mountains, Ethiopia.
GLOBAL ECOLOGY AND CONSERVATION, 46.
e02546-e02546.
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Worku et al 2023 Mountain nyala group dynamics GEE.pdf - Open Access published version Download (2MB) | Preview |
Abstract
As an adaptive biological trait, group size may offer a useful metric for monitoring the welfare of wildlife species affected by their environmental surroundings. Here, we examine the drivers that cause variation in group size of the endangered mountain nyala (Tragelaphus buxtoni), including a range of natural ecological factors as well as the density of livestock. For this purpose, we collected data along transect lines during both wet and dry seasons focusing on the hitherto poorly studied populations in the Arsi Mountains National Park, Munessa-Kuke Controlled Hunting Area and Muktar Mountain Forest Reserve, which are managed for multiple use of a variety of natural resources. We found group sizes to be an average of 6.3, 4.4 and 4.1 individuals in the Arsi Mountains, Munessa-Kuke and Muktar Mountain study areas, respectively, and a combination of livestock density and habitat visibility explained as much as 74% of the variation in group size. We propose that whereas group size increases with forage availability (as measured by Normalized Difference Vegetation Index -NDVI) and in open habitats (probably due to a switch in antipredator strategy), the presence of livestock also has an independent, negative impact on group size because of the associated disturbance. The findings contribute to understanding the environmental drivers of variation in group size in social antelopes, particularly highlighting the need to improve livestock management to help conservation of species at risk.
| Item Type: | Article |
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| Uncontrolled Keywords: | Livestock, Mountain nyala, Group size, Forage availability, Visibility |
| Divisions: | Faculty of Health and Life Sciences Faculty of Health and Life Sciences > Institute of Infection, Veterinary and Ecological Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 11 Jul 2023 12:35 |
| Last Modified: | 20 Sep 2023 23:31 |
| DOI: | 10.1016/j.gecco.2023.e02546 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3171620 |
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