Figure H-1. Length frequency histograms of zebra mussels collected at Dliniwek site (RM 492.4) in 

 Reach 15 of the Upper Mississippi River from July 1994 through September 1995. 

 Data used to generate these histograms is presented in Table H-2. 



Length Interval (mm) 



1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 



35 

 30 

 25- 

 20- 

 15 

 10 



5 





 30 i 

 25 

 20 

 15 

 10 



5- 





 30-t 

 25 

 20- 

 15- 

 10 



5 





 30 

 25 

 20 

 15 

 10 



5 





 30 

 25 

 20 

 15 

 10 



5- 







22 July 1994 



17 August 1994 



rff^ RS^^^»- 



01 December 1994 



11 Julxl995 



26 September 199^^ 



__.^^Hi|Wn»iqi|Hi 



9 11 13 15 17 19 21 23 25 27 29 31 33 35 



Length Interval (mm) 

 Page H-3 



Whitney et al., Unionid Survey - Reach 15 UMR 



