Over the past 300 years, what had been a bountiful harvest of river herring declined for many reasons including dam construction and poor water quality. In the late 20th century, herring populations sharply dropped to as little as one percent of their historic size.
Woods Hole Sea Grant is working in partnership with conservationists, river herring wardens, and others to monitor the population, to study it to understand the pressures on the species, and to develop solutions to help increase its numbers.
- Closing the loop: characterizing habitat requirements, movements, and life stage linkages of river herring in Massachusetts watersheds (2020-2022)
- Use of Dual-Frequency Identification Sonar to Monitor Adult River Herring in a Small Coastal Stream (2010-2012)
- Beyond Fish Passage: Variability in Nursery Habitat and its Influence on the Feeding, Growth, and Survival of the Early Life Stages of River Herring (2014-2016)
Sea-Run Fish StoryMap
Each spring, hundreds of thousands of river herring rush through Massachusetts coastal waters to spawn. Explore stories of sea-run fish and the Sea Grant researchers working to understand and protect these ecologically vital species, including Adrian Jordaan and colleague's life-stage assessment project funded by Woods Hole Sea Grant.