Darin Osland (INHS) served as project assistant 

 and diver. Other INHS employees assisting as divers or 

 field assistants were Lori Soeken, Curt Elderkin, Chad 

 Heffren, Andy Hershberger, Mike Schroeder, Ted Snider, 

 Jim Stoeckel, and Andy Williams. Stephanie Wickman 

 served as office manager during this project and Cammy 

 Smith provided additional secretarial support. We are 

 indebted to Larry Gross and Jim McNamara for their help 

 fabricating and maintaining field equipment. Lorin 

 Nevling was Chief of INHS during this project and Robert 

 Herendeen and David Philipp served as directors of the 

 INHS Center for Aquatic Ecology; their support was 

 appreciated. 



Additional assistance in the field and laboratory 

 was received from Andrea Wiemer, an intern in the 

 Illinois Energy Education Development (ILEED) 

 program; volunteers Kim Elkin and Heather Kline; and 

 the LTRMP Field Station staff. 



References 



Ackerman, G. and R. DeCook. 1996. Commercial 

 harvest of freshwater mussels in Iowa, 1995. 

 Annual Commercial Harvest Report. 6pp. 



Blodgett, K. D. and R. E. Sparks. 1987a. Analysis of 

 a mussel die-off in Pools 14 and 15 of the Upper 

 Mississippi River. Illinois Natural History 

 Survey Aquatic Biology Section Technical Report 

 87/15. 26pp. 



Blodgett, K. D. and R. E. Sparks. 1987b. A summary 

 of freshwater mussel sampling in Mississippi 

 River Pool 15, Upper Mississippi River. Report 

 to Illinois Department of Conservation. Illinois 

 Natural History Survey Aquatic Biology Section 

 Technical Report 87/16. 11pp. 



Cawley, E. T. 1989. A survey of the unionid mussel 

 populations of the Sylvan Slough mussel 

 sanctuary, Pool 15, Upper Mississippi River. 

 Report to the Illinois Department of Conservation 

 Research Project 3-427-R. 32pp. 



Chamberlain, T. K. 1931. Aimual growth of freshwater 

 mussels. Bulletin of the Bureau of Fisheries. 46: 

 713-739. 



Fntz, A. W. 1988. Illinois mussel shell harvest, 1987. 

 Annual Commercial Harvest Report, IDOC. 

 10pp. 



Green, R. H. 1979. Sampling design and statistical 

 methods for environmental biologists. John 

 Wiley and Sons, New York. 



Heath, D. L., M. P. Engel, and J. A. Holzer. 1988. 

 An assessment of the 1986 commercial harvest 

 of freshwater mussels in the Mississippi River 

 bordering Wisconsin. Mississippi River work 

 unit summary report. Wis. Dept. of Natural 

 Resources: La Crosse, WI. 



McCuaig, J. M. and R. H. Green. 1983. Unionid 

 growth curves derived from annual rings: a 

 baseline model for Long Point Bay, Lake Erie. 

 Canadian Journal of Fisheries and Aquatic 

 Sciences 40: 436-442. 



Neves, R. J. 1993. A state-of-the-unionids address. 

 Pages 1-10 in K. S. Cummings, A.C. Buchanan, 

 and L.M. Koch, eds. Conservation and 

 management of freshwater mussels. Proceedings 

 of a UMRCC symposium, 12-14 October 1992, 

 St. Louis, MO. Upper Mississippi River 

 Conservation Committee, Rock Island, Illinois. 



Neves, R. J. 1987. Proceedings of the workshop on die- 

 offs of freshwater mussels in the United States. 

 June 23-25, 1986 in Davenport, Iowa. 

 Sponsored by U.S. Fish and Wildlife Service and 

 Upper Mississippi River Conservation 

 Committee. 166 pp. 



Neves, R. J. and S. N. Moyer. 1988. Evaluation of 

 techniques for age determination of freshwater 

 mussels (Unionidae). American Malacological 

 Bulletin, Vol. 6(2): 179-188. 



Page, L. M., K. S. Cummings, C. A. Mayer, S. L. 

 Post, and M. E. Retzer. 1991. Biologically 

 significant Illinois streams. An evaluation of the 

 streams of Illinois ba.sed on aquatic biodiversity. 

 Project Completion Report F-llO-R. Illinois 

 Department of Conservation and Illinois 

 Department of Energy and Natural Resources. 

 485 pp. 



Pitcher, T. J. and P. J. B. Hart. 1982. Fisheries 

 Ecology, page 251. The AVI Publishing 

 Company, Incorporated, Westport. CT. 414pp. 



14 



