Photo by Joel Sartore.
Chesapeake Logperch | Percina bimaculata
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The Chesapeake Logperch is a rare darter found in the lower Potomac and Susquehanna River basins. For years it was mistaken for its close relative, the Common Logperch, until scientists confirmed in 2008 that it was actually a distinct species. Upon closer inspection, Chesapeake Logperch have fewer stripes and a more compact body making it stand out from other similar species.
Like all logperch, the Chesapeake Logperch has a unique way of hunting for food. With its pointed snout and bulbous tip, it skillfully flips over pebbles and rocks to find tiny aquatic insects hiding underneath. Watching them do this in the wild is mesmerizing and is a perfect example of how every species plays a special role in its ecosystem.
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When researchers realized the Chesapeake Logperch was a separate species, they had to take a fresh look at its habitat and population size. Unfortunately, pollution and sediment buildup caused major habitat loss, and this fish completely vanished from the Potomac River. Today it survives only in parts of the Susquehanna River below a dam, and its range has shrunk by a devastating 70%.
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CFI’s work with the Chesapeake Logperch felt monumental - it was our first project in Pennsylvania and the furthest north we’ve ever traveled for a species release. Working alongside our partners we witnessed just how much can be achieved when people come together for conservation. The Pennsylvania Fish and Boat Commission was so committed to the success of this project that they even worked to remove competing fish species to give the Chesapeake Logperch a better chance at recovery.
In 2020 and 2021, our goal with our partners was to boost Chesapeake Logperch numbers. During this time, we successfully bred and raised nearly 2,500 baby logperch! These fish were then sent to Penn State University for further rearing and eventual release.
We were shocked at the sheer number of eggs this species produces. Compared to other logperch we’ve worked with, the Chesapeake Logperch vastly outproduced them all. Some days, we had as many as 150 tiny larvae hatching at once, and within just a couple of weeks we had almost 2,000 swimming babies. It was an exciting and unexpected success, proving just how resilient this species can be when given a chance.
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Our work with the Chesapeake Logperch is a powerful reminder of why conservation matters. This species still faces challenges, but thanks to strong partnerships and dedicated efforts, we’re making real progress toward protecting its future. With continued care and habitat protection there’s hope that this little fish will keep thriving for generations to come.
Status: IUCN: Vulnerable; USFWS: Under Review
CFI Status: Propagated at CFI from 2019-2020 for propagation protocols and restoration. What do these terms mean?
Susquehanna and Potomac River drainages, PA, MD, and VA
Native Range
Threats
Development, habitat fragmentation, impoundments, pollution, and sedimentation. What do these terms mean?
Spawning Habitat Preferences: Early-mid spring spawners in medium creeks to small rivers with high flow; eggs are laid in gravel substrate
In Partnership With: Pennsylvania Fish and Boat Commission (PFBC), Maryland Department of Natural Resources (MDNR), Pennsylvania State University (PSU), Susquehanna River Basin Commission (SRBC), and District of Columbia Department of Energy and Environment (DCEE).