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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.

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Common name: Longnose Dace

Taxonomy: available through www.itis.gov

Identification: Wydoski and Whitney (1979); Smith (1985); Hubbs et al. (1991); Page and Burr (1991); Jenkins and Burkhead (1994). In his type catalogue, Gilbert (1998) recognized three subspecies: R. c. cataractae, R. c. dulcis, and R. c. smithi; he noted that considerable work still needs to be done on the taxonomy of the species.

Size: 16 cm.

Native Range: Generally distributed above 40 N from coast to coast; occurs as far north as Arctic Circle in Mackenzie River drainage; south in Appalachian Mountains to northern Georgia and in Rocky Mountains south into Rio Grande drainage of Texas and northern Mexico (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: Evidently a bait bucket release in Strawberry Reservoir in 1951 (Sigler and Miller 1963). Suspected bait bucket introduction in Wyoming (Baxter and Simon 1970) and in Kentucky (Jenkins and Burkhead 1994); possible bait bucket releases in other sites.

Status: Established in Colorado where it is abundant and widespread in the main-stem Colorado River and in transition zone riffles (Walker 1993); Tyus et al. (1982) listed it as rare in the upper Colorado River basin. An eradication program was carried out in Strawberry Reservoir, Utah (Sigler and Miller 1963), but the results of those efforts were unclear. Established an spreading in the upper Roanoke, Virginia (Jenkins and Burkhead 1994). Reported from Kentucky (Jenkins and Burkhead 1994).

Impact of Introduction: Longnose Dace hybridize with native speckled dace R. osculus in areas where Longnose Dace have been introduced (Sigler and Miller 1963). This hybrid has been recorded from Utah in the Provo River in 1942 and from the Strawberry Reservoir in Wasatch County in 1951 (Sigler and Miller 1963). It has also been recorded from areas where both species are native, such as, the Bear River Wyoming, Little Wood River, Idaho and Ross Fork at Fort Hall, Idaho (Sigler and Miller 1963).

Remarks: This species is sometimes used as a baitfish (Baxter and Simon 1970; Scott and Crossman 1973). Tyus et al. (1982) gave a distribution map of the this species in the upper Colorado basin.

References: (click for full references)

Powers, S.L, and P.A. Ceas. 2000. Ichthyofauna and biogeography of Russell Fork (Big Sandy River - Ohio River). Southeastern Fishes Council Proceedings. 41: 1-12.

Sigler, W.F., and R.R. Miller. 1963. Fishes of Utah. Utah Department of Fish and Game, Salt Lake City, UT.

Other Resources:

Author: Nico, L.

Peer Review Date: 8/6/2004

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.