The 2014 herring migration was tracked by nearly 100 trained volunteer herring monitors at the DCR Upper Mystic Lake dam in Medford, MA. Their efforts resulted in 31,296 herring counted. With this data the Massachusetts Division of Marine Fisheries estimates the run size at 239,059 +/- 37,288 herring. These results suggest the number of river herring entering into Upper Mystic Lake increased in 2014.
Read more about the Herring Monitoring Program here.