Invasion

Invasion Description

1st Record: VA/James River estuary (1974, Jenkins and Burkhead 1993, 64, 100 fish stocked); VA/Rappahannock River estuary (1975, Jenkins and Burkhead 1993, 97,800 fish stocked)

Ictalurus furcatus was reported to have been introduced to the Potomac at the turn of the century by the United States Fish Commission (Smith 1907), as an accidental contaminant of stocks of I. punctatus (Channel Catfish). However, preserved voucher specimens, labelled as I. furctatus were actually I. punctatus (Burkhead et al. 1980), so these early reports are unverified.

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1st Record: DE/Christiana River (2013, Rob Aguilar, personal communication), 1 specimen; (Delaware Department of Fish and Wildlife 2017)

Geographic Extent

Conowingo Dam/MD/Susquehanna River (8/3/2011, USGS Nonindigenous Aquatic Species Program 2011); Elk; Sassafras, and Susquehanna River (Maryland Department of Natural Resources 2010; Schloesser et al. 2011; Nepal and Fab\irizio 2019); MD/upper Patuxent River (2008, Schloesser et al. 2011); MD/Nanticoke River (Nepal and Fabirizio 2019); VA/Burke and Brittle Lakes, Potomac watershed (1981-1985, Jenkins and Burkhead 1993); Haines Point/DC/Anacostia River (1987, Nammick and Fulton 1987, 1 fish); MD/DC/VA/Potomac River estuary ((Starnes 2002; Maryland Department of Natural Resources 2010; Starnes et al. 2011; epal and Fabirizio 2019); Greenlee and Lim 2011; Schloesser et al. 2011, current distribution River Km 54 -181, Schloesser et al. 2011); VA/Rappahannock River estuary (1975, Jenkins and Burkhead 1993, 97,800 fish stocked; current distribution River Km 23.1-146.7 Schloesser et al. 2011; Nepal and Fabirizio 2019); VA/Piankatank River (2000, Schloesser et al. 2011, River Km 28.5-34.2); VA/York-Pamunkey-Mattaponi Rivers (1985, Greenlee and Lim 2011; Schloesser et al. 2011, current distribution River Km 37-182; Nepal and Fabi\rizio 2019); VA/James River estuary (1974, Jenkins and Burkhead 1993, 64,100 fish stocked; Greenlee and Lim 2011; current distribution River Km 9.4 -138.7, Schloesser et al. 2011; Nepal and Fabriizio 2019); Seaford/DE/Nanticoke River (2010, USGS Nonindigenous Aquatic Species Program 2018). Multiple record-size fish had been caught, by August 1917 (http://www.wmdt.com/news/delaware/state-record-catfish-caught-from-the-nanticoke-river-in-seaford/601447789); off Smith Point VA to Gunpowder Neck/MD/Chesapeakes Bay (2018-2019, Nepal and Fabrizio 2019, 0-21 PSU, 98.6 < 10 PSU)

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DE/Christiana River (2013, Rob Aguilar, personal communication), 1 specimen); DE/Delaware River, Christiana River (Delaware Division of Fish and Wildlife 2017); DE/Delaware Bay (2021-2022, USGS Nonindigenous Aquatic Species Database 2023); https://delawarecurrents.org/2023/11/08/delaware-river-invasive-fish/