To breed or not to breed? Evidence of density- and size-dependent mortality in hatchery-reared juvenile white sturgeon (Acipenser transmontanus) in the Kootenai River. Success of hatchery‐reared juvenile white sturgeon (Acipenser transmontanus) following release in the Kootenai River, Idaho, USA, https://doi.org/10.1111/j.1439-0426.1999.tb00226.x. The Kootenai River White Sturgeon Recovery Team was convened in 1994, provided a draft Recovery Plan in 1996 and the first complete Recovery Plan for Kootenai River white sturgeon in 1999 (USFWS 1996, 1999). Kootenai River White Sturgeon Investigations : White Sturgeon Spawning and Recruitment Evaluation, 1998 Annual Report.

2005). Third, Kootenai River white sturgeon spawning has been documented during most years from 1990 through 2005. The document reflects advancements in understanding of white sturgeon and changes that have taken place over the last two decades intended to help the prehistoric fish rebound. Passage performance and physiological stress response of adult white sturgeon ascending a laboratory fishway. Microhabitat use of native fishes in the Kootenai River: A fine‐scale evaluation of large‐scale habitat rehabilitation efforts. With abundance halving time of approximately 8 years, the Kootenai River white sturgeon population is rapidly dwindling, leaving managers little time to act. Concurrently, post-release hatchery reared juveniles (as young as 9 months of age at release) consistently exhibit successful growth and survival (Ireland et al. Status of White Sturgeon (cipenser transmontanus Richardson, 1863) throughout the species range, threats to survival, and prognosis for the future. After the dam, the fish started spawning in sandy-bottomed areas near Bonners Ferry, which isn’t conducive to egg survival. Significant recruitment of young sturgeon has not been observed since the early 1970s and consistent annual recruitment has not been seen since the 1950s. Recommendations for the 1999 spawning season include coordinating the flow test with sturgeon behavior and river temperatures of 8-10 C (46-50 F), and discharge should be in increments of 57 m{sup 3}/s (2,000 cfs) per day to a minimum of 1,130 m{sup 3}/s (40,000 cfs) at Bonners Ferry.
This assertion is based on four key observations. Sturgeon recovery efforts are occurring against a backdrop of a broader ecosystem protection and restoration program for the Kootenai River ecosystem. We monitored the movements of 31 adult sturgeon in Kootenay Lake, British Columbia (BC) and the Kootenai River from mid-March until late August 2004. If you do not receive an email within 10 minutes, your email address may not be registered, Based on ages of viable eggs and the dates of egg collection, we estimated that white sturgeon spawned during at least 20 days in 1998. Eighteen of the 31 telemetered adult white sturgeon were released at Hemlock Bar reach (rkm 260.0) as part of a research project to test the feasibility of moving sexually mature adult white sturgeon to areas with habitat types thought to be more suitable for successful egg hatching and early life stage recruitment. �� �" �� ��? Fish & Wildlife Service ECOS Environmental Conservation Online System 2004 peaked in mid December. In 1972, Libby Dam began operation, reversing the natural flow regime of the river, and releasing frequent power peaking flows. Factors influencing the effectiveness of local versus national protection of migratory species: a case study of lake sturgeon in the Great Lakes, North America. BOISE, Idaho — Federal officials are revising a 1999 plan as part of a strategy to recover endangered white sturgeon in the Kootenai River in northern Idaho and western Montana. A Riparian Habitat Hypothesis for Successful Reproduction of White Sturgeon. The U.S. Recovery plan for Kootenai River white sturgeon (Acipenser transmontanus)

Canadian Journal of Fisheries and Aquatic Sciences. The remaining wild population consists of a cohort of large, old fish that is declining by about 9% per year as fish die naturally and are not replaced. Ontogenetic behavior of Kootenai River White Sturgeon, Acipenser transmontanus, with a note on body color: A laboratory study. An integral part of this approach is the continual monitoring of performance measures to assess the progressive response of the population to implemented actions, to evaluate the actions efficacy toward achieving objectives, and to refine and redirect strategies if warranted. But the long-lived fish – up to a century – don’t become sexually mature until about age 25. The goal of this plan, which is to maintain a viable, persistent population that can support a sustainable fishery, is supported by the following objectives: (1) a natural, stable age structure comprising both juveniles and a broad spectrum of spawning age-classes; (2) stable or increasing numbers of both juveniles and adults; (3) consistent levels of average recruitment to ensure future contribution to reproductive potential; (4) stable genetic diversity comparable to current levels; (5) a minimum level of abundance of 2,500 adults to minimize extinction risk; and (6) provision of an annual sustainable harvest of 5 kg/ha.
Request. “The old plan had become woefully out of date,” said Jason Flory, a biologist with the U.S. Success of hatchery‐reared juvenile white sturgeon (Acipenser transmontanus) following release in the Kootenai River, Idaho, USA, https://doi.org/10.1111/j.1439-0426.1999.tb00226.x.

“That’s basically staved off extinction,” Flory said. Effects of calcium availability on growth of larval Lake Sturgeon. River management alters ecosystem metabolism in a large oligotrophic river.

In an ideal world, specific recovery measures would be identified and implemented based on a series of complementary research investigations to definitively identify the proximate causes and specific mechanisms of recruitment failure. Assessment of bioaccumulated metal and organochlorine compounds in relation to physiological biomarkers in Kootenai River white sturgeon. A review of genetic evaluation tools for conservation and management of North American sturgeons: roles, benefits, and limitations. Recruitment has failed, in part because fish are currently spawning at sites where or when conditions appear unsuitable for successful incubation and early rearing. Spawning locations and movement of Kootenai River white sturgeon. You are accessing a document from the Department of Energy's (DOE) OSTI.GOV. The Kootenai River White Sturgeon Recovery Team was convened in 1994, provided a draft Recovery Plan in 1996 and the first complete Rec overy Plan for Kootenai River white sturgeon in 1999 (USFWS 1996, 1999).

Kootenai River White Sturgeon Recovery Implementation Plan and Schedule; 2005-2010, Technical Report 2004-2005. He said work on that document could begin this year.