Disclaimer:

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.

---

Common name: Lahontan Redside

Synonyms and Other Names: Lahontan redside shiner

Taxonomy: available through www.itis.gov

Identification: La Rivers (1962); Moyle (1976a); Page and Burr (1991). It should be noted that its congener, Richardsonius balteatus, is called the redside shiner.

Size: 17 cm.

Native Range: Lahontan and other interior basins in northern and western Nevada, and northern California, including Humboldt, Walker, Carson, Truckee, Susan, Quinn, and Reese River systems; Walker, Tahoe, and Pyramid lakes (Page and Burr 1991).

Alaska	Hawaii	Puerto Rico & Virgin Islands	Guam Saipan

Native range data for this species provided in part by NatureServe

Hydrologic Unit Codes (HUCs) Explained
Interactive maps: Point Distribution Maps

Means of Introduction: The species was stocked in Nye County, Nevada, in 1956 and 1957, and into Weber Lake, California (La Rivers 1962); the specific reasons for these introductions were not given. This species and Rhinichthys osculus robustus were introduced to Ruby Lake, Nevada, from a headwater of the Humboldt River, presumably to serve as forage for introduced largemouth bass (Hubbs et al. 1974). Most other records may have been the result of bait bucket releases (Kimsey 1950; Moyle 1976a) although Kimsey (1950) also argued that its occurrence in Miller Lake, California, a site near the Lahontan system, was possibly the result of a natural stream capture event.

Status: Established in California (Moyle 1976a); reported, possibly established, in Nevada (Deacon and Williams 1984). The Ruby Lake population apparently did not survive (Hubbs et al. 1974).

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: Although Wydoski and Whitney (1979) reported the Lahontan Redside as introduced into the Bonneville basin, Idaho, we found no substantiating evidence to support this. Simpson and Wallace (1978), Lee et al. (1980 et seq.), Sigler and Sigler (1987), and Page and Burr (1991) make no mention of such an introduction. Because of several other errors in the same table, we chose not to include this record.

Other Resources:

Author: Leo Nico, and Pam Fuller

Peer Review Date: 12/5/2003

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.