Ctenopharyngodon idella (Valenciennes in Cuvier and Valenciennes, 1844) (ITIS)
Grass carp, white amur
Eastern Asia (NAS Database)
1963 (NAS Database)
Imported for aquaculture and for phytoplankton control (NAS Database)
Direct and indirect impacts via: competition for food; significant changes in the composition of macrophyte, phytoplankton, and invertebrate communities; interference with the reproduction of other fishes; decreases in refugia for other fishes; modification of preferred habitat; predation or competition when plant food is scarce. Has significantly altered the food web and trophic structure of aquatic systems by inducing changes in plant, invertebrate, and fish communities (NAS Database)
Minnesota Department of Natural Resources.
The Minnesota Department of Natural Resources is conducting an immediate response to the capture of 51 invasive carp on the Mississippi River. The invasive carp were caught by two commercial fishing operators near La Crosse and Trempealeau, Wisconsin, during routine spring netting last weekend. In response to this discovery, the DNR is working with the U.S. Fish and Wildlife Service, the U.S. Geological Survey, the Wisconsin DNR and commercial fishing operators to conduct large-scale netting, studies of the captured carp and increased monitoring. "The location where these fish were caught is commonly netted because of concentrations of commercially valuable fish," said DNR invasive carp field lead Ben Larson. "This is the largest congregation of invasive carp we've seen this far upstream." Invasive carp have been progressing upstream since escaping into the Mississippi River in Arkansas in the 1970s. These large fish compete with native species and pose a threat to rivers and lakes.
Invasive carp captures must be reported to the DNR immediately. Call 651-587-2781 or email firstname.lastname@example.org. Take a photo and transport the carp to the nearest DNR fisheries office or make arrangements for it to be picked up by a DNR official. More information about invasive carp is available on the Minnesota DNR website.
Government of Canada Releases Socio-Economic Study on the Risk of Grass Carp to the Great Lakes (Mar 13, 2019)Government of Canada.Grass carp, one of four species of Asian carp, has the potential to disrupt the Great Lakes ecosystem and economy unless their spread is stopped, according to a report released by Fisheries and Oceans Canada with support from the Great Lakes Fishery Commission and the Ontario Ministry of Natural Resources and Forestry. The socio-economic study concludes that, in addition to the significant ecological threat that is posed by the presence of grass carp in the Great Lakes, there would also be economic, social and cultural ripple effects. The full report can be viewed here (PDF | 1.34 MB).
Ohio State University. Ohio Sea Grant College Program.
The Great Lakes Sea Grant Network has released a comprehensive and coordinated outreach and education report on Asian carp in the region. The document includes information on carp life history, movement and behavior, monitoring, control, ecosystem impacts and gaps in current knowledge that need to be addressed further. The plan’s development was funded by the Great Lakes Restoration Initiative through the Asian Carp Regional Coordinating Committee. The final report can be downloaded here (PDF | 5.6 MB).
Distribution / Maps / Survey Status
DOI. USGS. Wetland and Aquatic Research Center.Provides detailed collection information as well as animated map.
DOI. FWS. Fish and Aquatic Conservation.Includes species listed as injurious wildlife under the Federal Lacey Act (18 USC 42), which makes it illegal to import injurious wildlife into the United States or transport between the listed jurisdictions in the shipment clause (the continental United States, the District of Columbia, Hawaii, the Commonwealth of Puerto Rico, and any possession of the United States) without a permit. An injurious wildlife listing would not prohibit intrastate transport or possession of that species within a State where those activities are not prohibited by the State.
Injurious wildlife are wild mammals, wild birds, amphibians, reptiles, fishes, crustaceans, mollusks and their offspring or eggs that are injurious to the interests of human beings, agriculture, horticulture, forestry, wildlife or wildlife resources of the U.S. Plants and organisms other than those stated above cannot be listed as injurious wildlife.
See also: Injurious Wildlife: A Summary of the Injurious Provisions of the Lacey Act (Dec 2017; PDF | 401 KB)
Google. YouTube. PBS NewsHour.
Asian Carp Regional Coordinating Committee.
Google. YouTube; Toronto and Region Conservation Authority.
The section below contains highly relevant resources for this species, organized by source. Or, to display all related content view all resources for Grass Carp.
Council or Task Force
New York Invasive Species Clearinghouse.
Texas Commission on Environmental Quality, Galveston Bay Estuary Program; Houston Advanced Research Center (HARC).
State and Local Government
Indiana Department of Natural Resources.
Wisconsin Department of Natural Resources.
Alabama Department of Conservation and Natural Resources.
Minnesota Department of Natural Resources.