ACKNOWLEDGMENTS 



The author is indebted to W. T. Young, Fishery Aid, for his 

 assistance in the field studies. The following persons contributed 

 to the planning and supervision of the study program: Willis King, 

 John Blosz, and Marvin Snilth, of the Bureau of Sport Fisheries and 

 Wildlife. Assistance in various phases of the work was rendered by 

 Lawrence Miller, Paul Bryan, and Ben Jaco, of the Tennessee Valley 

 Authority, and Clarence White of the Alabama Department of Conserva- 

 tion. Dr. Henry van der Schalie, of the University of Michigan, 

 identified the species of mussels collected. 



Special thanks are due Leonard Foote, of the Wildlife Manage- 

 ment Institute, for advice in the statistical analysis of the data 

 and for his critical review of the manuscript. Evigene Surber and 

 others of the U. S. Fish and Wildlife Service reviewed the manuscript. 



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