Specimen Information

Morone americana × mississippiensis
Morone americana × mississippiensis
(White Perch × Yellow Bass)
Native Hybrid

Specimen ID159951
Speciesamericana × mississippiensis
Common NameWhite Perch × Yellow Bass
LocalityIllinois River, La Grange Reach [extends from La Grange Lock & Dam located south of Beardstown, IL upstream to Peoria Lock & Dam near Peoria, IL.]
Mapping AccuracyApproximate
HUC8 NameLower Illinois-Lake Chautauqua
HUC8 Number07130003
Collection Year2000
Year AccuracyActual
Potential Pathwaycanal
Reference 1
Ref. Number:13977
Author:Irons, K.S., T.M. O'Hara, M.A. McClelland, and M.A. Pegg
Title:White perch occurrence, spread, and hybridization in the middle Illinois River, upper Mississippi River system.
Journal:Transactions of the Illinois State Academy of Science
Commentsfirst documentation of this hybrid; M. americana invaded via canals into native M. mississippiensis range; 32 found in 2001.
Record TypeLiterature
Earliest Recordnation
Number Collected1
Specimen ImpactM. mississippiensis is already in decline; may be at risk from competition w/ M. americana


The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2022]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [5/19/2022].

Contact us if you are using data from this site for a publication to make sure the data are being used appropriately and for potential co-authorship if warranted.

For general information and questions about the database, contact Wesley Daniel. For problems and technical issues, contact Matthew Neilson.