The Shellfishers of St. Catherines Island: Hardscrabble Foragers or Farming Beachcombers?

Abstract

ABSTRACTSt. Catherines Island (Georgia, USA) was separated from the mainland at about 3000 BC, creating massive estuarine tidal marshes, which aboriginal foragers began exploiting almost immediately. Correlative optimal foraging modeling and four decades of archaeological fieldwork demonstrate how this baseline shellfishing economy evolved and persisted, with some local impacts on estuarine resource patches, but no detectable changes in diet breadth over several millennia. The first St. Catherines islanders were likely tribal-level, egalitarian societies living in economically self-sufficient, virtually sedentary, and politically autonomous villages. They made the earliest pottery in North America. Shortly after AD 800, early Mississippian populations developed into chiefdoms characterized by ranked, inherited social hierarchies, ascribing social status and wealth at birth. This significant shift took place wholly in the context of their long-standing shellfishing economy. In the face of dramatically increasing populations, St. Catherines islanders gradually intensified their shellfishing and, at about AD 1400, they began cultivating maize and other domesticates. Shellfishing offers generally higher return rates than corn farming, so the adoption of a maize-based economy was likely driven by political, social, and perhaps adaptive changes in the Mississippian world rather than strictly provisioning strategies.