Assessing foraging variability on small islands in Manu‘a (American Samoa) during the first millennium BC

Abstract

Small islands are important model systems for examining the role of people in shaping novel environments and modifying resources through time. Here we report on the vertebrate faunal assemblages recovered from two sites on Ofu and Olosega islands (American Samoa), which were occupied only a few centuries after the initial settlement of the islands. We assess forager decision-making both locally and regionally as well as changing subsistence regimes. Our results suggest foraging efforts were focused on the marine environment, particularly fish, but with concomitant evidence for interactions with terrestrial habitats (e.g. seabirds) including the introduction of commensal species (i.e. red junglefowl and Pacific rat). Notably we documented a high degree of similarity between the fish species reported archaeologically and those targeted by modern subsistence fishers in the region, which is despite the occurrence of wide scale coastal landscape changes over the past several thousand years. These preliminary outcomes may suggest fish resources have remained stable through initial occupation to the present-day, but future zooarchaeological research is required to comprehensively evaluate the sustainability of the marine fishery over the past several millennia.