FISHERY BULLETIN: VOL. 71, NO. 3 

 Table 2. — Plankton samples 22, 23 and 24 March 1972. 



the 24th. Significantly, they were three times 

 more numerous in the surface plankton samples 

 on the 24th (Table 2). 



Caridean Shrimp Larvae 



Our data suggest an increase in caridean 

 shrimp larvae at the surface after dark, even 

 though many are present in daylight (Table 2). 

 Based on the collections, caridean larvae were 

 more numerous in the plankton than were the 

 forms discussed above, but many were too large 



to be taken as prey by the silverside (see below). 

 It remains undetermined how many of those 

 individuals in the plankton were, in fact, suit- 

 ably sized prey, so that numbers in the gut sam- 

 ples cannot be related to numbers in the plank- 

 ton, as is done above. 



Cuuditcia discaudata 



The greater numbers of this copepod in the 

 diet of the silverside on 24 March, when it 

 ranked fourth, compared to 23 March, when it 



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