oa Madoqua - Intersexual dominance and differential mortality of Gemsbok Oryx gazella at Namib Desert waterholes
|Article Title||Intersexual dominance and differential mortality of Gemsbok Oryx gazella at Namib Desert waterholes|
|© Publisher:||Namibian Ministry of Environment and Tourism|
|Affiliations||1 Institute of Ecology, University of California, Davis, California|
|Publication Date||Jan 1977|
|Pages||5 - 19|
|Keyword(s)||Arid region mammals, Behavioural observations, CaIves abandoned, Food conditions, Gemsbok movements, Interspecific interactions, Nomadic herds, Social organization, Stipagrostis namaguensis vegetation, Submissive posture and Water stress|
Observations of gemsbok, Oryx gazella, were made in the Kuiseb River canyon of the Namib Desert. Adults individually contest one another for the right to drink from shallow water wells they dig in the sands of the dry river course. These waterholes are initiated at the dry bottom of open pools after seasonal flooding has passed and the open water dries up. A temporary linear hierarchy is established at each waterhole, allowing adult males to exclude adult females. A combination of flood and water shortage resulted in heavy mortality with a loss of all calves and a disproportionate mortality to adult females during one year of observations.
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