Figure F-3. Recruitment of unionid mussel species at Case-IH (RM 488.5) in Reach 15 of the Upper 

 Mississippi River, 1985, 1987, and 1994. Length-frequency distributions (Appendix C) were 

 used to calculate percentage (%) and density (no./m-) of individuals within the specified size 

 range. 



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Whitney et al., Unionid Sur\'cv - Reach 1 5 UMR 



