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2.2. <br />2.1.8. Determine reliable, nonlethal aging techniques. <br />Reliable, nonlethal aging techniques need to be developed. Age <br />and growth information must be recorded from captive, <br />reintroduced, and wild fish to ensure accurate estimates of <br />age. Fish hatcheries presently holding pallid sturgeon should <br />assist in obtaining this information from captive fish. <br />Research additional solutions to the impacts of human activities <br />on pallid sturgeon and their habitat. <br />2.2.1. Identify priority areas and needs for restoring the diverse <br />riverine floodplain habitats. <br />The U.S. Army Corps of Engineers, the U.S. Fish and Wildlife <br />Service, and States should determine priority areas for <br />restoring the diverse riverine habitats by reconnecting cut -off <br />features. This should be conducted first within priority <br />recovery areas. Federal and State management areas and refuges <br />along the rivers should be evaluated for restoration <br />opportunities. The U.S. Army Corps of Engineers should then <br />design restoration projects for each potential site. <br />2.2.2. Develop simulation models for operation of main stem Missouri <br />River and tributary dams to benefit pallid sturgeon and provide <br />for other uses. <br />The U.S. Army Corps of Engineers should continue to refine the <br />simulation models created during the Missouri River Master <br />Manual review process. The U.S. Bureau of Reclamation should <br />initiate studies to develop simulation models for pallid <br />sturgeon habitat and other uses below their dams on Missouri <br />River tributaries. <br />2.2.3. Design multi -level releases from main stem Missouri River <br />reservoirs. <br />The U.S. Army Corps of Engineers should design alternative <br />measures for incorporating multi -level releases from the <br />warmer, upper -water column of main stem reservoirs, and should <br />investigate other means to restore the natural temperature <br />regime of the Missouri River. This should be conducted first <br />within priority recovery areas. <br />2.2.4. Develop pilot projects on selected dams to transport sediment <br />past the dam and into the river reaches downstream. <br />The U.S. Army Corps of Engineers and U.S. Bureau of Reclamation <br />should design and develop pilot projects to increase sediment <br />transport past selected dams. Models should be used to predict <br />32 <br />