University of Maine researchers are seeking to gain more insight into river herring recovery in the Penobscot River using a novel surveying tool: environmental DNA (eDNA). eDNA is the genetic material shed by all organisms in the environment, which can be collected and sequenced. By testing its viability as a survey tool, UMaine researchers and read more UMaine scientists use eDNA to enhance river herring recovery research in Penobscot River