150 



COVICH, SHEPARD, BERGEY, AND CARPENTER 



5000 



5000 



MAR. MAY JUNE JULY AUG. 

 MONTH 



(a) 



MAR. MAY JUNE JULY AUG. 

 MONTH 



(b) 



5000 



MAR. MAY JUNE JULY AUG. 

 MONTH 



(0 



Fig. 5 Density values for stations G-1 (a), G-2 (b), and G-3 (c), 

 based on averages of triplicate samples. Because of sampler losses 

 only duplicate samples were available at G-1 and G-2 in August. Bars 

 indicate range of data; black dots denote means. 



5000 



1000 



MAR. MAY JUNE JULY 

 MONTH 



(a) 



MAR. MAY JUNE JULY 

 MONTH 



(b) 



Fig. 6 Density values for stations P-1 (a) and P-2 (b), based on 

 averages of triplicate samples at all stations. 



