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<br />ww <br /> <br />COLORADO RIVER RECOVERY PROGRAM <br />FY-1998 PROPOSED SCOPE-OF-WORK <br /> <br />Project No,: CAP-6-WW <br /> <br />Lead Agency: <br /> <br />U.S, Bureau of Rec\amation <br /> <br />Submitted by: <br /> <br />Kathy Holley, Project Manager <br /> <br />Steven J. Hamilton and Kevin J. Buhl - Principal Investigators <br />National Biological Service <br />Midwest Science Center <br />Yankton Ecotoxicology Research Station <br />RR I Box 295 <br />Yankton, SD 57078-9214 <br />605-665-9217 <br />605-665-93354 FAX <br />Steve_Hamilton@NBS,GOV <br />Kevin_Buhl@NBS,GOV <br /> <br />Date: April 24, 1997 <br />Revised February 19, 1998 by Norman/Holley (edited February 24. 1998) <br /> <br />Category: <br />XOngoing project <br />_Requested new start <br />_Requested new start <br />_Unsolicited project <br /> <br />Expected Funding Source: <br />_Annual funds <br />]LCapital funds <br />_Other (explain <br /> <br />I. Title of Proposal: <br />Flooded Bottomlands Restoration Program: Site: Walter Walker State Wildlife Area ryvwSW A). <br />Evaluation of contaminant impacts on razorback suckers utilizing restored flooded bottomlands in <br />the Upper Colorado River (Remediation Phase), <br /> <br />II. Relationship to RIPRAP: <br />Colorado River Action Plan: Mainstem <br />I1.A.To restore and manage flooded bottomland habitat. <br /> <br />III. Study BackgroundlRational and Hypotheses: <br />In order to determine the suitability of restored floodplain habitats for use by razorback sucker and <br />other listed fishes, the degree of selenium (and other inorganics) contamination in several key <br />ecosystem components must be determined, Field and laboratory studies have shown that selenium <br />has the propensity to be strongly bioaccumulated in aquatic food chains, Low waterborne <br />concentrations of selenium can result in elevated selenium residues in food organisms that are toxic <br />to fish that consume them. The purpose of this study is to determine if ambient concentrations of <br />selenium in the water and food-chain organisms in restored habitats adversely affect the <br />reproductive success of razorback suckers, the survival and growth oflarval razorback suckers, and <br />also to develop remediation techniques (Remediation Phase). <br />