of Fish, Wildlife, and Parks? The Yellowstone and the Upper Missouri (above Ft. Peck dam) rivers exhibit a somewhat natural hydrograph but have altered flow regimes because of the smaller dams in the system. The pallid sturgeon range in Montana and western North Dakota has declined to 60% of their historical range (Figure 1) with recent sightings concentrated in 27% of their range (Tews). The Pallid Sturgeon is scarce in the upper Missouri River above Fort Peck Reservoir, Missouri and lower Yellowstone Rivers between Fort Peck Dam and Lake Sakakawea, Missouri River downstream of Gavins Point Dam and in the Mississippi and Atchafalaya Rivers. Genetics, 1:17-32. 100 N. Bismarck Expressway, Bismarck, ND 58501-5095 The lake was formed in 1956 with the completion of the Garrison Dam which was constructed for flood control and hydroelectric power generation. Morphometric comparisons of upper Missouri River sturgeons. Pallid sturgeon and shovelnose sturgeon in the Missouri River from Fort Peck Dam to Lake Sakakawea and in the Yellowstone from Intake to its mouth by Anne Elizabeth Tews, unknown edition, Lake Sakakawea has flooded pallid sturgeon rearing areas. This distinguishes it from the more common shovelnose sturgeon. (1985), and 4 suspected hybrids have been reported from the 2 populations in Montana (Gardner 1995 and S. Krentz , personal communication, 2000). Habitats and movements of pallid and shovelnose sturgeon in the Yellowstone and Missouri rivers, Montana and North Dakota. ________. screening and velocity requirements). The ACOE manages water releases from impoundments in the Missouri River System. There are 35 recreation areas around Lake Sakakawea offering outdoor recreation opportunities such as camping, boating, fishing, sailing and hunting. The pallid sturgeon is one of the rarest fishes in North America (Kallemeyn 1983) and was federally listed as endangered in 1990. Day-use Facilities Day-use Facilities. Berard, E. 1985. Promote non-traditional bank stabilization measures (i.e. Status of the pallid sturgeon (Scaphirhynchus albus). Fed. 1985. Cons. 1997a. Pallid sturgeon are also found in several of the larger tributary rivers of these two great rivers. Allendorf. The requirements for Lake Sturgeon to reach this point in the ESA listing process are relatively minor. There are hiking trails throughout the park and a swimming beach. Fed. Lake Sakakawea is a large reservoir in the north central United States, impounded by Garrison Dam, a U.S. Army Corps of Engineers dam located in the Missouri River basin in central North Dakota. Lake sturgeon are listed as either threatened or endangered by 19 of the 20 states within its original range in the United States. U.S. Fort Peck dam and reservoir have eliminated 18% of the Montana habitat and fragmented pallid sturgeon into two populations; the Upper Missouri population located upstream of Fort Peck reservoir and the Yellowstone/lower Missouri River population downstream of Fort Peck reservoir. The complete regulation of the Missouri River by Fort Peck dam has caused dramatic changes in flow, temperature and turbidity in this 330 km reach. The Missouri River, Lake Sakakawea and Lake Audubon are outdoors meccas for fishing, hunting and recreating. A fish health concern recently surfaced in 1999 with the detection of a new irido virus discovered in the Gavins Point National Fish Hatchery where pallid sturgeon were being reared. Therefore, it is important to realize that immediate evaluations are impractical and recovery will take a dedicated, long-term commitment. Key Areas and Conditions for Pallid Sturgeon in North Dakota. They prefer sandy substrates and are often associated with subclimax seral stage islands or alluvial bars (Bramblett 1996). It’s the third largest reservoir in the United States at 368,000 acres. Gardner (1994) estimated there were only 50 adult fish remaining in the Upper Missouri River population. Montana State University, Bozeman. Continue to work with NDSWC to develop minimum in-stream flow recommendations. Initial releases of 750 hatchery-reared yearling pallid sturgeon were accomplished for both the Upper Missouri River and Missouri/Yellowstone River populations during 1998. Keenlyne, K.D., C.J. Hybridization with shovelnose sturgeon (Scaphirhynchus platorynchus) may also be a problem. The park is a hub for boating. To address pallid sturgeon passage and entrainment on the Yellowstone River, the USFWS has begun consultation with BOR regarding problems at Intake diversion dam. 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