Tasmanian Knowledge and Skill: Maladaptive Imitation or Adequate Technology?

Abstract

A recent article has suggested that maintenance of complex tools and associated tasks in a group depends on the presence of skilled individuals to serve as targets for imitation. The expected number of skilled target individuals, it is argued, relates to the population size. It is predicted that population size and maximum complexity of tools and/or tasks should correlate, hence a decrease in population size could lead to maladaptive loss of skills. Data from Tasmania are said to support the argument. However, the argument neither agrees with the archaeological data from Tasmania nor ethnographic observations on hunter-gatherer societies. Instead of being an example of a group that underwent maladaptive loss, the indigenous people of Tasmania appear to have used tools sufficient for the tasks at hand. An alternative model is proposed that distinguishes between motor skills and knowledge needed to do tasks effectively and takes into account assessment of the time cost for developing skills. Loss of skills more likely relates to change in the mode of resource procurement or change in technology rather than a shortage of skilled, target individuals due to decrease in population size.