Eastern chimpanzee mortality rate9/11/2023 ![]() ![]() The Kanyawara data thus suggest an important downward revision in adult mortality rates for wild chimpanzees, but they do not challenge the existence of an important difference in adult mortality between humans and chimpanzees.įoragers Life history evolution Life table Wild chimpanzees.Ĭopyright © 2013 Elsevier Ltd. The comparable adult mortality rate from a range of human foraging societies is ∼2%. Trade in orphans and bushmeat threatens one of the Democratic Republic of the Congos most important populations of eastern chimpanzees (Pan troglodytes schweinfurthii). In this paper, I address the impact of hunting on the red colobus population at Ngogo. One or more leopards was the primary cause of chimpanzee mortality during a 5-year period in the. Life table data from Kanyawara indicate a mean mortality rate of 3.9% per year over the ages of 10-35, substantially less than the equivalent figure of 6.8% from a sample of other long-term chimpanzee study sites. dation by chimpanzees may be contributing to this decline. Kanyawara chimpanzees in this sample had a life expectancy at birth of 19 years, and individuals living to age 14 could expect to live for another 24 years. However, overall mortality rates were significantly lower than those reported from the long-term study sites of Gombe, Taï and Mahale. Sex differences in mortality at Kanyawara appeared similar to those reported from other sites. This community has shown modest growth over the past 25 years, avoiding some of the worst impacts of human contact. Here we present a life table for chimpanzees living in the Kanyawara community of Kibale National Park, comprising 1129 individual risk years and 56 deaths. Five morphologic diagnoses accounted for 61 of mortalities: cardiomyopathy hemorrhage acute myocardial necrosis amyloidosis and pneumonia. Published mortality data, however, come primarily from chimpanzee populations that have recently suffered dramatic, human-induced declines, and exhibit rates of reproduction well below replacement. Chimpanzees fed on 137 different plant species, a variety similar to that of wild. The most common causes of mortality were: cardiomyopathy (40 of all mortalities) stillbirth/abortion acute myocardial necrosis chimpanzee-induced trauma amyloidosis and pneumonia. schweinfurthii) Nigeria-Cameroon chimpanzee (P. Four subspecies have been identified, based on differences in appearance and distribution: Western chimpanzee (P. Demographic data from wild chimpanzees are of considerable interest for understanding the evolution of the human life history. Chimpanzees are one of our closest relatives, sharing an estimated 98 of their genes with humans. ![]()
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