Common name: hybrid silver/bighead carp
Identification: Burr and Warren (1986).
Size: Maximum size probably similar to parent species, approximately 1 meter.
Native Range: They may hybridize in the wild because of the overlap in native ranges in China. However, most of the hybrids in the rivers there may be due to aquaculture escapes.
Hydrologic Unit Codes (HUCs) Explained
Puerto Rico &
Interactive maps: Point Distribution Maps
Table 1. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Names and dates are hyperlinked to their relevant specimen records. The list of references for all nonindigenous occurrences of Hypophthalmichthys molitrix x nobilis are found here.
Table last updated 9/30/2019
† Populations may not be currently present.
Means of Introduction: The individual species were intentionally stocked in aquaculture facilities for food and to improve water quality in catfish ponds by reducing phytoplankton.
Status: Reported from Alabama, Kentucky, and Missouri. In the Missouri River and its tributaries, approximately 3-5% of the catch have been hybrids (D. Chapman, pers. comm.). As long as the the two individual carp species co-exist, there will most likely be hybrids present.
Impact of Introduction: The impacts of this hybrid are most likely similar to those of the individual species. Studies are just underway to make that determination.
References: (click for full references)
Burr, B. M., and M. L. Warren, Jr. 1986. A distributional atlas of Kentucky fishes. Kentucky Nature Preserves Commission Scientific and Technical Series 4. 398 pp.
Chapman, D. 2005. Personal communication. U.S. Geological Survey, Columbia, Missouri.
Pam Fuller, and Amy Benson
Revision Date: 5/9/2019
Peer Review Date: 4/1/2016
Pam Fuller, and Amy Benson, 2019, Hypophthalmichthys molitrix x nobilis: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=550, Revision Date: 5/9/2019, Peer Review Date: 4/1/2016, Access Date: 11/19/2019
This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.