Table 5. Probability (P) values (of type I error) for a 



1-way ANOVA (Brown-Forsythe) comparing growth rates 

 (shell length) of mussels from two fleeted and two 

 unfleeted plots in the Illinois River at Naples. 



P n Plots 



Amblema plicata 0.006 109 d,u,g,p 



Leptodea fragilis 0.055 14 d,p 



Proptera laevissima 0.445 8 d,p 



Quadrula pustulosa 0.584 11 d,g,p 



d - unfleeted, downstream control 



u - unfleeted, upstream control 



g - fleeted, barges grounded 



p - fleeted, barges tied to pilings 



27 



