Martin's suggestion that there is great continuity in subsistence strategy through the Middle and Late Woodland periods of the Northern Great Lakes is rejected. She fails to produce convincing evidence for the use of gill nets during Middle Woodland times and to account for the difference in fish fauna on sites of these two periods. Also addressed here is the possible consequence of economic specialization on population size and fluctuation. It is concluded that unlike Middle Woodland populations, those of the Late Woodland fluctuate rather dramatically. Finally, it is suggested that whatever the cause of the population loss and mechanisms of replacement, these shifts likely have important implications for periodicity in ceramic style change.