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The Nonindigenous Occurrences section of the NAS species profiles has a new structure. The section is now dynamically updated from the NAS database to ensure that it contains the most current and accurate information. Occurrences are summarized in Table 1, alphabetically by state, with years of earliest and most recent observations, and the tally and names of drainages where the species was observed. The table contains hyperlinks to collections tables of specimens based on the states, years, and drainages selected. References to specimens that were not obtained through sighting reports and personal communications are found through the hyperlink in the Table 1 caption or through the individual specimens linked in the collections tables.




Ctenopharyngodon x Hypophthalmichthys idella x nobilis
(grass carp x bighead carp)
Fishes
Exotic Hybrid
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Ctenopharyngodon x Hypophthalmichthys idella x nobilis

Common name: grass carp x bighead carp

Identification: Similar to pure grass carp but with many features intermediate between the two parent species. Howells (1992) provided distinguishing features. Maximum size: Probably similar to grass carp, 75 -125 cm.

Native Range: None; artificial hybrid.

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Alaska
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Hawaii
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Puerto Rico &
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Nonindigenous Occurrences:

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 Ctenopharyngodon x Hypophthalmichthys idella x nobilis are found here.

StateYear of earliest observationYear of last observationTotal HUCs with observations†HUCs with observations†
Arizona197019701Lower Salt
California197919792Lower Colorado; Salton Sea
Florida198119811Kissimmee
Texas19901990*

Table last updated 5/25/2018

† Populations may not be currently present.

* HUCs are not listed for states where the observation(s) cannot be approximated to a HUC (e.g. state centroids or Canadian provinces).


Means of Introduction: Intentionally stocked by the Texas Parks and Wildlife Department in 1989 (Howells 1992a).

Status: Reported in Arizona and Texas. Eradicated in California.

Impact of Introduction: It failed to control hydrilla in the Salton Sea.

Remarks: This hybrid is believed, but not proven, to be sterile. As of 1990 it is illegal to possess this hybrid in Texas (Howells 1992a).

Other Resources:
Fact Sheet for Ctenopharyngodon idella - USGS Nonindigenous Aquatic Species Database

Fact Sheet for Hypophthalmichthys nobilis - USGS Nonindigenous Aquatic Species Database


Author: Fuller, P.

Revision Date: 4/11/2006

Peer Review Date: 4/1/2016

Citation Information:
Fuller, P., 2018, Ctenopharyngodon x Hypophthalmichthys idella x nobilis: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=515, Revision Date: 4/11/2006, Peer Review Date: 4/1/2016, Access Date: 6/19/2018

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.

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URL: https://nas.er.usgs.gov
Page Contact Information: Pam Fuller - NAS Program (pfuller@usgs.gov)
Page Last Modified: Wednesday, May 23, 2018

Disclaimer:

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. [2018]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [6/19/2018].

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