Karen Wilson University of Southern Maine In the Penobscot River Estuary, the return of large numbers of river herring coincides with a legacy of mercury contamination from historic industrial activity. Sea Grant funded research has demonstrated that juvenile river herring are spending much longer in the estuary than previously thought (weeks to months) and consuming … Continue reading DV-16-26 Assessing possible mercury contamination in juvenile river herring in the Penobscot Estuary