Each year at this time, American Shad (Alosa sapidissima) and Blueback (Alosa aestivalis) and Alewive (Alosa
pseudoharengus) Herring migrate up the Charles River to spawn. Returning to
the their natal rivers after 4-6 years of feeding and growing in the ocean,
shad and herring start heading upriver in April and May when rivers reach about
21 to 24*C. Unlike salmon, herring and shad return to the ocean after they
spawn and repeat this process again (Loesch and Lund, 1977).
American Shad Alosa sapidissima
river herring, photo courtesy of UMass Amherst
The
Charles River Watershed Association wants to learn more about where these
species are utilizing the Charles and we need your help.
If you see a herring,
please let us know!
Send us a picture via email charles (at) crwa.org
Give us a call (781) 788-0007
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