THORACICA 



Barnacles 



The occurrence of barnacles in nauplii and cyprid stages is given in figure 9. 

 The latter averaged less than 0.5 percent of the catch composition of the two 

 stages. Except for 1957 and 1958, which seemed to be poor years as far as 

 barnacle productivity was concerned, the period of greatest abundance was 

 January through April, with a peak of production in February. 



CUMACEA 



CATEGORIES OF ABUNDANCE 



NONE 



500 1500 10,000 + 

 15 00 10,000 



JAN 

 (41) 



FEB 

 (4 4) 



Figure 9. — Percentage occurrence of barnacle 

 nauplii and cyprids in categories of abundance 

 (November 1953 - May 1958). 



These small, shrimp-like crustaceans were found infrequently in the collec- 

 tions in very small numbers and were limited to a 4-nnonth period, late fall to 

 early spring. Their occurrence was as follows: 



23 



