•^ 100 



E 



6 

 in 



S I 



V 



o 



< 



<505^m 



0.1 



-I 1 — I r III 



0.1 



_i I 1 i_ 



to 

 I 



E 



E 



in 

 o 

 in 



100 



10 



B 



Q 



^ I 

 10 < 0.1 



CHLa(/igL-l) 



>505/i.m 



~1 1 1 — I I T T^ 



% . o.« 



-J — L i 1.1-1 



10 



Figure 5. — Relationship between ash-free dry mass (AFDM) and maximum Chla concentration, from 4 CalCOFI cruises. Open 

 circles are day samples, closed circles are night samples. A, AFDM <505 jim; B, AFDM >505 |xm. 







NIGHT 



100 



CHLa(/igL-') 



Figure 6. — Relationship between the percentage of ash-free dry mass in the fraction <505 [xm and Chla concentration, from 4 

 CalCOFI cruises. A, Day samples; B, night samples. 



80 and 90. (Even so, the two offshore stations 

 along line 80 were sampled only on cruise 8609. ) 

 Samples from lines 83 and 87 are included in 

 Figures 3-6 but were not analyzed for spatial 

 trends. Along both line 80 and line 90 the 4- 

 cruise average of total AFDM decreased in the 

 cross-shore direction (Fig. 7A, B). On individual 

 cruises a secondary maximum of standing stock 

 often occurred offshore along line 80 (e.g., 

 cruises 8609, 8705) and line 90 (e.g., cruises 

 8609, 8703, 8705). 



The percentage of zooplankton standing stock 

 <505 iJim also exhibited some cross-shore 

 trends. On both lines 80 and 90, the median value 

 was highest at the station closest to shore (Fig. 

 7C, D). On line 80 the median value first 



decreased then remained relatively constant in 

 the offshore direction. On line 90 the median 

 value decreased to station 80 then appeared to 

 increase again at the more offshore stations. 

 (This apparent offshore increase at stations 110 

 and 120 may have been influenced by a higher 

 incidence of daytime samples.) That is, mesozoo- 

 plankton appeared to make a larger contribution 

 to standing stock at the most inshore stations 

 and possibly at the most offshore stations along 

 line 90. 



DISCUSSION 



These results demonstrate that, on average, 

 approximately one third of the >202 ixm zoo- 



972 



