October (Fig 14). Site 2 barnacle set continues strongly though 

 diminishing in August-September and September-October from the 

 July-August maximum; however, it exhibits no second peak set such 

 as occurred at Site 1. No set occurred after October-November for 

 Site 1 nor after November-December for Site 2. No seasonal attachment 

 termination data are available for Sites 3 and 4. 



Figure 15 and Table 1 demonstrate that Site 2 cumulative panels 

 for 1 through 12 months retain more barnacles and for longer periods 

 than do Site 1 panels for comparable periods. Organisms on both Site 

 1 and 2 panels far exceed original set and retention of Site 4 panels. 



The use of bottom test cylinders and test stakes (Fig 16 and Table 1) 

 introduced set data differences in relation to shape of test objects, and 

 significant differences in relatively small vertical layering increments 

 above the bottom. Panels immersed as shown in Figure 2 are usually 

 between 36 and 60 inches above the bottom, but may be less depending 

 on how well the bottom supports the rack. The use of bottom test 

 cylinders and stakes, though not specifically designed to collect this 



















































_•_ SITE 1 1956-1956 

 _-o-- site 2 1957 -195? 



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 1 



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4000 

 3000 

 2000 



1000 

 750 

 500 

 250 



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



FIGURE 14 COMPARISON OF MONTHLY BARNACLE FOULING FOR 

 SITES 1 & 2. 



16 



