Measuring subsistence specialization: Comparing historic and prehistoric abalone middens on San Miguel Island, California

Red abalone middens, common on the Northern Channel Islands during the Middle Holocene, have often been interpreted as relatively specialized foraging camps. To test the degree of subsistence specialization of one such site, we compared faunal data from a 6400-year-old red abalone midden (CA-SMI-557) and an historic “Chinese” black abalone midden (CA-SMI-558) located along the same drainage on San Miguel Island. The historic assemblage, resulting from highly specialized abalone harvest, drying, and export activities, provides a baseline for evaluating the degree of subsistence specialization at the red abalone midden, where a wider range of economic and subsistence activities is represented. We illustrate how detailed comparative study of faunal remains, artifacts, site structure, and archival sources can help elucidate the economic function of both historic and prehistoric sites.