Demographic consequences of a food and water shortage to desert Chacma Baboons,Papio ursinus |
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Authors: | William J Hamilton |
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Institution: | (1) Institute of Ecology, University of California, 95616 Davis, California |
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Abstract: | The age-sex composition of a chacma baboon (Papio ursinus)population changed following a 5-month interval of extreme food and water shortages. Mortality was significantly greater among
adult females, juveniles, and infants than among adult males. The probable basis of 19 of 22 deaths during the interval of
food and water shortage was starvation caused by drought conditions which localized water sources, reducing access to food
resources. This resulted in a long-term (> 6-year) shift in adult sex ratios within this three-troop population, from 1.04
to 1.42-1.58 adult and subadult males per adult female. Patterns of intertroop interaction were also influenced by food scarcity,
which determined which troop was most seriously affected. |
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Keywords: | chacma baboon demography population regulation sex ratio intergroup conflict |
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