Bottom test cylinders from Site 4 were fouled with well-developed 

 colonial hydroids in contrast to the sparse hydroid fouling on Site 3 

 bottom test cylinders. Site 4 graduated stakes, being bent and leaning, 

 were approximately parallel to, and at the same height as, the bottom 

 test cylinders; consequently were not analyzed. Site 3 stakes, standing 

 upright were fouled with hydroids over about 50 percent of their area, 

 with progressively heavier growth toward the sea surface. 



C. Calcareous Tubeworms 



Calcareous tubeworms cannot be considered as one of the 

 more important fouler s; however, they occur locally in sufficient 

 concentration to affect certain types of equipment adversely. 



120 



I 10 



100 



90 



80 



70 



60 



50 



40 



30 



20 



10 









1 1 1 1 1 1 





















— 



*— •— SITE 1 1956-1958 

 — -o-- SITE 2 1957-1959 

 •— + — • SITE 4 1959 















9 

 — © — 













i i i i i 



NUMBERS ADJACENT TO POINTS 

 INDICATE TOTAL MONTHS EXPOSED 











A 



















4 













\ 

 1 \ 

















* 



< 



x v 



* 6 



*4 









i I 



; 















/ 



• 



/ 















l 



\ 

 I 













/ 



¥ 















1 

 1 





1 

 \ 













i 

 i 















I 

 1 





1 



kio 











I 



* 









7 



6 

 0— 



7 



— Ni 



f 



1 

 I 





V 



\ 











1 



i 





2 

 o 



/\ 





'\d 



^ 



>'. 8 - 



9 



— ••— 



N?8 



—a— 



ii 



— • 





Mi. 









r 



• 



< 

 / 



f 







\/ 







10 



\ 



V 





12 





» 

 1 



4 

 rf 





'< 



* 5 





V 



5 











\ 



• 

 12 







^PR. MAY JUN. JUL. AUG. SEP. OCT. NOV. DEC. JAN. FEB. MAR. APR. MAY JUN. 



FIGURE 24 HYDROID FOULING, CUMULATIVE, 1 THROUGH 12 MONTHS. 



27 



