Laserfiche WebLink
<br />ww <br /> <br />a. General water quality parameters (including <br />alkalinity, ammonia, calcium, chloride, <br />conductivity, dissolved oxygen, hardness, <br />magnesium, nitrate, nitrite, pH, sulfate, <br />and turbidity). <br /> <br />b. Sediment texture (particle size analysis) and <br />chemistry. <br /> <br />c. Water and sediment discharge into and out of <br />the restoration sites. Water flow <br />measurements will be related to stage and <br />discharge measurements at gaging stations on <br />the Colorado River. <br /> <br />d. Primary productivity. <br /> <br />e. Semi-quantitative estimates of benthic and <br />plankton abundance and species diversity. <br /> <br />~ask 2. <br /> <br />Evaluate survival, reproductive success, and <br />bioaccumulation ot selenium in razorback sucker adults <br />stocked in restored sites. <br /> <br />Rationale <br />Field and laboratory studies have shown that selenium has a <br />the propensity to be strongly bioaccumulated in aquatic food <br />chains. Low waterborne concentrations of selenium can result in <br />elevated selenium residues in food organisms that are toxic to <br />fish that consume them. The purpose of this study is to <br />determine if ambient concentrations of selenium in the water and <br />food~chain organisms in restored habitats adversely affect <br />survival and reproductive success of razorback sucker adults. <br /> <br />4 <br />