Table 18 continued. 



*p<0.05, **p<0.001 



*p<0.0001 



Most of the correlations between toxicity and the concentrations of chlorinated organic compounds 

 were not significant (Table 19). Only cis-chlordane, trans-nonachlor, 2,4'-DDD, 4,4'-DDE, 4,4'-DDT, 

 and the sum of total indeno-pesticides were significantly negatively correlated with any of the toxicity 

 tests. These compounds were significantly correlated with the microbial bioluminescence test results. 

 In addition, 4,4'-DDT was significantly correlated with amphipod survival. However, none of these 

 correlations would remain significant if the number of variables (20) were taken into account. 



Table 19. Spearman-rank correlations (Rho, corrected for ties) between four toxicity end-points 

 (as percent of controls) and the concentrations of PCBs and pesticides in Hudson-Raritan Estu- 

 ary sediments (n=38). 



*p<0.05, **p<0.001, ***p<0.0001 



< mdl = all samples below method detection limit 



81 



