The estimated body sizes of hominin individuals and the averages per species are used in palaeoanthropological research to gain more insight in the biology, ecology and life history of Homo erectus...Show moreThe estimated body sizes of hominin individuals and the averages per species are used in palaeoanthropological research to gain more insight in the biology, ecology and life history of Homo erectus (Aiello and Key 2002; Foley 1987; McHenry and Coffing 2000). For such inferences to be made, body size needs to be estimated reliably and accurately. The methods that are used in body stature estimation by the use of femur length are evaluated in this thesis. For this evaluation, 110 stature estimation equations for a range of modern human populations were collected. These equations were used for the calculation of stature estimates for 25 hominin fossils with a range of femur lengths. Such an body stature estimate seems like an exact number, but the real estimate must be a range in order to incorporate the probable error. The error is caused by individual factors such as environmental influences during ontogeny, also at play in modern humans (Hauser et al. 2005), the unknown adaptations of the population (e.g., climatic Ruff (1994), energetic Kurki et al. 2008)) and the unknown amount of error arising from the application of an equation based on one species to another. Due to the error that is unknown, a confidence interval is hard to calculate but must be wide at the same time. This makes it difficult to use such estimates in a biologically relevant manner, for example for further calculations on a species' energetics (Smith 1996). The researchers making such calculations will have to address these issues and the danger of compound error. They will be aided by new finds of Homo erectus postcranial material (e.g. Simpson et al. 2008), which broaden the knowledge on the variation in size and proportions within Homo erectus thus helping to minimize error by scraping of a little of the "unknown" and aiding the choice of a reliable estimation method.Show less
