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Comparative primate energetics and hominid evolution

W R Leonard1, M L Robertson

  • 1Department of Anthropology, University of Florida, Gainesville 32611, USA.

American Journal of Physical Anthropology
|February 1, 1997
PubMed
Summary
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Human evolution involved increased energy demands, with Homo erectus showing significantly higher total energy expenditure (TEE) due to larger body size and more active foraging. This shift was likely driven by ecological changes favoring higher-quality diets.

Area of Science:

  • Paleoanthropology
  • Ecology
  • Human Evolution

Background:

  • Ecological models are crucial for understanding human evolution.
  • Energetics, a key aspect of ecosystem ecology, has been understudied in human evolution.
  • Metabolic requirements and energy expenditure vary significantly among primate species.

Purpose of the Study:

  • To examine ecological factors influencing metabolic variation in primates.
  • To infer changes in energy demands during human evolution.
  • To investigate the energetic correlates of foraging strategies.

Main Methods:

  • Collected data on body size, resting metabolism, and activity budgets for anthropoid species and human hunter-gatherers.
  • Estimated total energy expenditure (TEE) for selected species.

Related Experiment Videos

  • Analyzed correlations between energy expenditure, day range, and diet quality.

    • Main Results:

    • Relative energy expenditure and day range positively correlate with diet quality in primates.
    • Human foragers exhibit extreme levels of expenditure, range, and diet quality.
    • Total energy expenditure (TEE) increased substantially with Homo erectus, driven by larger body size and increased activity.

    Conclusions:

    • The evolution of Homo erectus likely involved a significant increase in TEE, potentially 40-85% higher than australopithecines.
    • Ecological shifts in African savannas may have promoted a more active, higher-diet-quality foraging strategy in early Homo.
    • Increased reliance on animal foods supported greater energy requirements and larger activity ranges during human evolution.