Table 13. Results of non-parametric Kruskal-Wallis tests of differences in toxicity between 

 sediment samples and respective controls with np Dunnett's t-test 



Toxicity end-point 



P Value 3 



No. of 

 batches 



Noof b 

 comparisons 



"Toxic" Samples c 

 Number Percent 



R. abronius 



percent survival 

 avoidance 



A. abdita 



.41 & .0001 

 .21 & .12 



percent survival (flow-thru) 



avoidance 



percent survival (static) 



M. edulis larvae 



percent abnormal 

 percent relative survival 



S. purpuratus larvae 



percent abnormal 

 percent abnormal and retarded 

 echinochrome content 

 percent fertilization 

 no. of mitoses per embryo 

 percent mitotic aberrations 

 micronuclei incidence 

 cytologic abnormality 



D. gyrociliatus 



egg production 



.22 & .03 



.24 & .27 



.0099 



.0001 

 .001 



.02 & .89 

 .38 & .12 

 .11 & .09 

 .02 & .05 

 .04 & .40 

 .11 & .01 

 .33 & .01 

 .008 & .04 



.04 & .006 



2 

 2 



2 

 2 

 2 

 2 

 2 

 2 

 2 

 2 



15 

 15 



15 

 15 



4 



15 

 15 



15 

 15 

 15 



5 

 5 

 5 

 5 

 5 



15 



2 + 3 



33 



a P value at which differences were indicated by non-parametric K-W test for each batch 



of tests. 



b Indicates total number of comparisons, relative to respective controls, from both batches. 



c Tested by one-way, np Dunnett's t-test (a = 0.05); with "toxic" defined as different (e.g., lower 



survival) from appropriate control. 



42 



