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Freshwater mussels discovered in urban Delaware river

l larvae to new areas where they can grow and thrive. Pennsylvania has more dams than any other state, and many of these are located in streams throughout the Delaware Valley. The lone exception is the Delaware River.

"Until this discovery, our surveys for freshwater mussels in southeastern Pennsylvania during the past 10 years have painted a grim picture. Only one species seems to still be prevalent in the area's streams, and even that species is found in only a handful of locations anymore," said Roger Thomas, staff scientist at the Academy of Natural Sciences' Patrick Center for Environmental Research in Philadelphia. These recently discovered beds of mussels can be used to help support mussel reintroduction into other areas where they have been lost."

Dr. Kreeger and others are in the process of expanding a fledgling mussel-restoration effort with support from a number of funders. These include ConocoPhillips, the National Fish and Wildlife Foundation, and the Pennsylvania Coastal Resources Management Program. She believes it is now possible to increase mussel populations throughout the Delaware River Basin by either breeding them in a hatchery or relocating adults during breeding season by releasing them in targeted streams. She and her colleagues at the Academy of Natural Sciences have been working with Cheyney University, the U.S. Fish and Wildlife Service, and the U.S. Geological Survey to experiment with different methods since 2007. They call their effort the Freshwater Mussel Recovery Program.

The Partnership for the Delaware Estuary is restoring mussels for many reasons, not just the fact that these animals are rare and endangered.

"Dense beds of mussels filter pollutants and make conditions better for fish and other aquatic life, improving water quality downstream in the estuary," said Jennifer Adkins, executive director of the Partnership for the Delaware Estuary. "We may have these beds of mussels to thank for keepi

Contact: Carolyn Belardo
Academy of Natural Sciences

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