Recovery Effort
In May 2000, the U.S. Fish and Wildlife Service, the Massachusetts Riverways Program, and volunteers from the Sudbury Valley Trustees (SVT) released 7,000 adult alewife (river herring) into the Concord River. They were transferred from the Nemasket River so that they could lay their eggs and spawn upstream. This imprinted the young alewives with the Concord as their new home river.
By August 2004, more than 1000 juvenile alewives were observed in Heard Pond, located on the Sudbury River. This provides strong evidence that the Alewife restoration project is working. Fishery biologists in the U.S. Fish and Wildlife Service hope that after three to five years in the ocean, these fish will complete the cycle by swimming back to Heard Pond again. They say that the fish will be able to swim over the top of North Billerica's Millpond Dam on the way downstream. However, on the return trip, they will need to be transported around the dam. If a sufficient number of fish return, the U.S. Fish and Wildlife Service will explore options for a more permanent solution which may include modifications to the dam.
Read more about this topic: Concord River
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