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Recovery Activities <br />In telemetry studies of pallid sturgeon on the Middle Mississippi River conducted <br />by Dr. Robert Sheehan of Southern Illinois University, Carbondale, IL, a positive <br />selection for main channel border and downstream islands tips was found and <br />also for depositional areas between wingdams and deep holes off of wingdam <br />tips. Sheehan speculated that between wingdam areas and downstream island <br />tips may be used as velocity refugia and /or feeding stations. Study sturgeon were <br />found most often in main channel habitat, however, they exhibited selection <br />against this habitat type. Their occurrence in such habitat was not surprising <br />considering main channel comprised approximately 65% of the available habitat <br />in the study reach. <br />Contact Person: Greg Tranah <br />Genetic Confirmation of Reproductive Isolation in <br />Pallid and Shovelnose Sturgeon. <br />Gregory J. Tranah, Harold L. Kincaid, Charles C. Krueger, Donald E. <br />Campton, Bernie May <br />Shovelnose Sturgeon <br />Pallid sturgeon <br />The reproductive and taxonomic <br />status of pallid (Scaphirhynchus <br />albus) and shovelnose (S. <br />platorynchus) sturgeon remain in <br />doubt. In the past, identification of <br />these species has been based <br />strictly on morphology. Several <br />genetic studies have been unable to <br />distinguish the two species or <br />