In general, historical data on clam populations throughout the Great Bay Estuary is insufficient to establish a reliable baseline from which to determine population trends and target effective management strategies. An updated assessment of flam populations and an analysis of the factors affecting them is needed in all areas of the Great bay Estuary. Though such a comprehensive study was beyond the scope of this project, assessment of clam abundance at selected sites conducted in this study represents and initiation of this task that should continue in subsequent years.