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.

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Common name: White River Spinedace

Taxonomy: available through www.itis.gov

Identification: La Rivers (1962); Sigler and Sigler (1987); Page and Burr (1991).

Size: 15 cm.

Native Range: Historically in the White River system, Nevada. Most populations are extirpated, and the species now exists only at Flag Springs in Nye County, Nevada (Page and Burr 1991; U.S. Fish and Wildlife Service 1994e).

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: Reportedly used as bait in 1951 in lower Colorado River (Miller 1952; La Rivers 1962). Transplanted from White River below Adams-McGill Reservoir to Railroad Valley in 1957 by Nevada Department of Wildlife (La Rivers 1962; U.S. Fish and Wildlife Service 1994e).

Status: Extirpated from sites where introduced in California and Nevada.

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: Listed as federally endangered species (U.S. Fish and Wildlife Service 1994e). Species has been adversely affected by introduced fishes including brown trout Salmo trutta, brook trout Salvelinus fontinalis, rainbow trout Oncorhynchus mykiss, cutthroat trout O. clarki, largemouth bass Micropterus salmoides, guppies Poecilia reticulata, mosquitofish Gambusia affinis, and goldfish Carassius auratus (U.S. Fish and Wildlife Service 1994e).

Other Resources:

Author: Nico, L.

Peer Review Date: 6/30/2000

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.