100 



50 





 100 



50 





 150 



- 100 



o 



;E 50 



C 





 1,250 



1,000 



750 



500 



250 







Figure 6. 



m 



Nematoda 



ii i 



i 



<^^^^^77^..<^77(:^^hYi^ r^^pg^L^rpT^TT, ^ 



-^ 



Z5 Nothria eleqans 



I 



^ ^^ 



,.^. 



Avmandia hioaulata 



J 



ii 



Cccpitella aapitata 



Nothria elegans 



n 



i 



y'^TTPtrr^ 



r^'^<' 



Oct. Nov. Dec. Jan. Feb. Mar, Apr. May 



1972 I 1973 



Settling jar occurrence during study period. Each bar 

 represents the number of individuals per jar per over- 

 lapping 16-day exposure interval. 



23 



