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Report Delaware River Blue Cats & Drum

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Report Delaware River Blue Cats & Drum

Source: Pennsylvania Fishing and Boating Commission

 

The Pennsylvania Fish and Boat Commission (PFBC) is alerting anglers that two species of fish that are non-native to the lower Delaware River basin, blue catfish and freshwater drum, are being detected in increasing numbers within those waters.

Blue catfish
Blue catfish

Blue catfish have been collected by partner agencies in the vicinity of the Commadore Barry Bridge in the lower Delaware River. These large, heavy-bodied fish can attain weights exceeding 100 pounds, although most larger adults are in the 30-pound range.

 Freshwater drum are the only member of a mainly saltwater family of fish that inhabit freshwater in North America. Adults typically weigh between five and 15 pounds. Captures have been documented by PFBC biologists in the tidal Delaware River, as well as the non-tidal portion upstream to the vicinity of Upper Back Eddy, Bucks County. Additionally, agency partners have collected freshwater drum in the lower Schuylkill River in Philadelphia.

“Documentation of expansion of both non-native blue catfish and freshwater drum is of potential major concern for fisheries and natural resources in the Delaware River and its tributaries as these are considered invasive species with potential major ecological impacts,” said Sean Hartzell, PFBC Aquatic Invasive Species Coordinator. “Where introduced elsewhere, such as the Chesapeake Bay, invasive blue catfish have impacted economically important commercial and sport fisheries. The potential impacts of introduced freshwater drum are less well-known, but this species is considered a threat to native freshwater mussels in the Delaware River basin due to its feeding preferences on hard-bodied invertebrates.”

Freshwater drum
Freshwater drum

While not native to the Delaware River Basin, both blue catfish and freshwater drum are native to parts of the Ohio River basin in western Pennsylvania. However, both species are considered invasive if introduced outside of their native range. Introduction of blue catfish, freshwater drum and other fish species into Commonwealth waters where they do not naturally occur, or without written permission from the PFBC, is considered an unlawful act.

In Pennsylvania, freshwater drum and all catfish species have no size limit or closed season, and up to 50 (combined with other species) may be taken per day by rod and reel. In their native range, freshwater drum are frequently captured as bycatch by catfish anglers baiting bottom rigs with worms or shrimp, and thus anglers fishing for catfish in the Delaware River basin are most likely to encounter both drum and blue catfish.

Anglers who catch these species in the Delaware River or its tributaries are encouraged to harvest these fish, take photos and report their captures to the PFBC’s online aquatic invasive species reporting form on the PFBC website.

 

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