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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.




Salvelinus malma
Salvelinus malma
(Dolly Varden)
Fishes
Native Transplant

Copyright Info
Salvelinus malma (Walbaum in Artedi, 1792)

Common name: Dolly Varden

Taxonomy: available through www.itis.govITIS logo

Identification: Scott and Crossman (1973); Wydoski and Whitney (1979); Morrow (1980); Page and Burr (1991).

Size: 63 cm.

Native Range: Arctic and Pacific drainages from Alaska to Puget Sound, Washington. Also in Asia (Page and Burr 1991).

Native range data for this species provided in part by NatureServe NS logo
Hydrologic Unit Codes (HUCs) Explained
Interactive maps: Point Distribution Maps

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 Salvelinus malma are found here.

StateFirst ObservedLast ObservedTotal HUCs with observations†HUCs with observations†
AK195819754Charley River-Yukon River; Healy Lake-Tanana River; Tok-Tanana River; Upper Koyukuk River
CA194519993Lake Tahoe; McCloud; Upper Yuba
CO19851985*
NV196120011Bruneau
NM19901990*
OR195519683Imnaha; Sprague; Upper Crooked
WY197019701Upper Laramie

Table last updated 12/10/2024

† 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: Intentional introductions for sportfishing. Introductions in Colorado took place in the 1890s and in 1968-1970 (Wiltzius 1985). Dolly Varden were introduced once into Wyoming, in 1968 (Baxter and Simon 1970).

Status: Introductions have failed to establish populations.

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.

Remarks: USNM specimen erroneously labeled from Nevada.

Other Resources:
FishBase Summary

Author: Fuller, P.

Revision Date: 6/27/2019

Peer Review Date: 5/18/2000

Citation Information:
Fuller, P., 2024, Salvelinus malma (Walbaum in Artedi, 1792): U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=941, Revision Date: 6/27/2019, Peer Review Date: 5/18/2000, Access Date: 12/10/2024

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.

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. [2024]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [12/10/2024].

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