Common name: tiger trout
Identification: Buss and Wright (1958); Brown (1966); Suzuki (1974); Becker (1983); International Game Fish Association (1994).
Size: Probably 70-103 cm.
Native Range: Mainly an artificial hybrid, but has been known to occur in nature (Brown 1966; Allan 1977; International Game Fish Association 1994). (Even where it occurs "naturally," it is the result of stocking a nonindigenous species, the brown trout).
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 Salmo trutta × Salvelinus fontinalis are found here.
Table last updated 2/27/2023
† 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: Some stocked intentionally as sport fish; others occur "naturally" as a result of brown trout stockings in native brook trout range (Holton 1990).
Status: Maintained by stocking. In Montana, some hybridization occurs "naturally" because both species are stocked in the same rivers (Holton 1990).
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.
References: (click for full references)
Insider Viewpoint. 2001. Fishing Records – Nevada
. Insider Viewpoint Magazine. 3 pp.
Rasmussen, J.L. 1998. Aquatic nuisance species of the Mississippi River basin. 60th Midwest Fish and Wildlife Conference, Aquatic Nuisance Species Symposium, Dec. 7, 1998, Cincinnati, OH.
Fact Sheet for Salmo trutta
- USGS Nonindigenous Aquatic Species Database
Fact Sheet for Salvelinus fontinalis - USGS Nonindigenous Aquatic Species Database
Revision Date: 3/5/2012
Peer Review Date: 3/5/2012
Fuller, P., 2023, Salmo trutta × Salvelinus fontinalis: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?speciesID=933, Revision Date: 3/5/2012, Peer Review Date: 3/5/2012, Access Date: 3/29/2023
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.