White sturgeon (Acipenser transmontanus)
The Kootenai River white sturgeon (Acipenser transmontanus) is 1 of 18 land-locked populations of white sturgeon known to occur in western North America. Kootenai sturgeon occur in Idaho, Montana, and British Columbia, Canada, and are restricted to approximately 167.7 River Mile (RM) of the Kootenai River extending from Kootenai Falls, Montana, located 31 RM below Libby Dam, Montana, downstream through Kootenay Lake to Corra Linn Dam at the outflow from Kootenay Lake in British Columbia. Approximately 45 percent of the speciesí range is located within British Columbia. Many Kootenai sturgeon migrate within this restricted portion of the Kootenai River system to spawn in the Kootenai River, and they spend part of their life in Kootenay Lake in British Columbia. The Kootenai River originates in Kootenay National Park in British Columbia, flows south into Montana, northwest into Idaho, then north through the Kootenai Valley back into British Columbia, where it flows through Kootenay Lake and joins the Columbia River at Castlegar, British Columbia. The wild population now consists of an aging cohort of large, old fish. The population has declined from approximately 7,000 white sturgeon in the late 1970s to 760 fish in 2000. At the current mortality rate of 9 percent per year, fewer than 500 adults remained in 2005 and there may be fewer than 50 remaining by 2030. Current data indicate that population abundance declines by about half every 7.4 years. During the last 14 years of intensive monitoring (using techniques proven suitable elsewhere) only one hatching embryo has been found and no free-swimming larvae or young-of-the-year have been captured. Estimates show that annually an average of 10 juvenile sturgeon are naturally reproduced in the Kootenai River. This suggests high levels of mortality which are unlikely to sustain the historic population of Kootenai sturgeon.
- States/US Territories in which the White sturgeon, U.S.A. (ID, MT), Canada (B.C.), Kootenai R. system is known to or is believed to occur: Idaho , Montana
- US Counties in which the White sturgeon, U.S.A. (ID, MT), Canada (B.C.), Kootenai R. system is known to or is believed to occur: View All
- Countries in which the the White sturgeon, U.S.A. (ID, MT), Canada (B.C.), Kootenai R. system is known to occur: Canada
|Status||Date Listed||Lead Region||Where Listed|
|09/06/1994||Pacific Region (Region 1)||U.S.A. (ID, MT), Canada (B.C.), (Kootenai R. system)|
» Federal Register Documents
|Date||Title||Plan Action Status||Plan Status|
|09/30/1999||Recovery Plan for the Kootenai River Population of the White Sturgeon (Acipenser transmontanus)||View Implementation Progress||Final|
|Date||Citation Page||Title||Document Type|
|04/08/2010||75 FR 17947 17950||5-Year Status Reviews of 69 Species in Idaho, Washington, Hawaii, Guam, and the Commonwealth of the Northern Mariana Islands||
|04/26/2001||66 FR 20962 20964||Endangered and Threatened Wildlife and Plants: Reopening of Public Comment Period and Notice of Availability of Draft Economic Analysis for Proposed Designation of Critical Habitat for the Kootenai River Population of White Sturgeon||
|08/09/2011||Kootenai River Distinct Population Segement of the White Sturgeon (Acipenser transmontanus) 5-Year Review: Summary and Evaluation|
» Critical Habitat
|Date||Citation Page||Title||Document Type||Status|
|07/09/2008||73 FR 39506 39523||Critical Habitat Revised Designation for the Kootenai River Population of the White Sturgeon (Acipenser transmontanus): Final rule.||Final Rule||Final designated|
|02/08/2006||71 FR 6383 6396||Critical Habitat Designation for the Kootenai River Population of the White Sturgeon: Interim rule.||Final Rule||Not Required|
|09/06/2001||66 FR 46548 46561||Final Designation of Critical Habitat for the Kootenai River Population of the White Sturgeon||Final Rule||Not Required|
|12/21/2000||65 FR 80698 80708||Endangered and Threatened Wildlife and Plants; Proposed Designation of Critical Habitat for the Kootenai River Population of the White Sturgeon||Proposed Rule||Not Required|
To learn more about critical habitat please see http://ecos.fws.gov/crithab
» Conservation Plans
No conservation plans have been created for White sturgeon.
» Life History
No Life History information has been entered into this system for this species.
» Other Resources
NatureServe Explorer Species Reports -- NatureServe Explorer is a source for authoritative conservation information on more than 50,000 plants, animals and ecological communtities of the U.S and Canada. NatureServe Explorer provides in-depth information on rare and endangered species, but includes common plants and animals too. NatureServe Explorer is a product of NatureServe in collaboration with the Natural Heritage Network.
ITIS Reports -- ITIS (the Integrated Taxonomic Information System) is a source for authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.
FWS Digital Media Library -- The U.S. Fish and Wildlife Service's National Digital Library is a searchable collection of selected images, historical artifacts, audio clips, publications, and video.