Common name: Woundfin
available through www.itis.gov
Identification: La Rivers (1962); Minckley (1973); Page and Burr (1991).
Size: 9 cm.
Native Range: Historically, in drainages of the lower Colorado River basin, including the Virgin and Gila river in Utah, Nevada, and Arizona. Now found only in the Virgin River, Arizona, Nevada, and Utah (U.S. Fish and Wildlife Service 1984a; Page and Burr 1991).
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 Plagopterus argentissimus are found here.
Table last updated 4/15/2021
† Populations may not be currently present.
Means of Introduction: Stocked intentionally for conservation purposes, the goal of which was to establish self-sustaining populations of this endangered species in its historic range so as to reduce the chance of Woundfin extinction (Ono et al. 1983). Stocking was carried out by the Arizona Game and Fish Department. The species was stocked in the Hassayampa River in February 1972 (500 fish), in the Salt River in March 1972 (350 fish), in Sycamore Creek in the spring of spring 1972 (a "few" fish), and in the Paria River several times between 1969 and 1972 (a total of 650 fish) (U.S. Fish and Wildlife Service 1984a, 1994c).
Status: All introduced populations failed to survive (Hendrickson and Brooks 1991). No Woundfin have been seen since their release in the Salt River. The population in Hassayampa River reproduced in the summer of 1972 but was destroyed in a flood in September of that year. The Sycamore Creek population survived the 1972-1973 flooding. Two gravid individuals were collected in late August 1973, but none have been seen since. No Woundfin were found in the Paria River in surveys conducted in 1974 and 1975 (U.S. Fish and Wildlife Service 1984a, 1994c).
Impact of Introduction: The impacts of this species are currently unknown, as no studies have been done to determine how it has affected ecosystems in the invaded range. The absence of data does not equate to lack of effects. It does, however, mean that research is required to evaluate effects before conclusions can be made.
Revision Date: 12/5/2003
Peer Review Date: 12/5/2003
Nico, L., 2021, Plagopterus argentissimus Cope, 1874: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=624, Revision Date: 12/5/2003, Peer Review Date: 12/5/2003, Access Date: 4/15/2021
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.