Table 1. Average densities of species whose abundance is more 

 than 3% of the fauna before (a) and after (b) the addition 

 of Sargassum . Actual counts from each of the five 225 cm^ 

 box cores are shown. 



p = polychaete, s = aplacophoran, b = bivalve, a = 

 amphipod, i = isopod, g = gastropod, o = oligochaete. 



% 

 Ave. #/core contri- 

 #/sq m n = 3 bution 



a. Before Sargassum treatments (background fauna) 



Mastobranchus sp. A. (p) 

 Pholidostrepia spp. (s) 

 Cuspidaria nr. 



atlantica (b) 

 Thyasira obsoleta (b) 

 Caulleriella sp. A. (p) 

 . stremna (p 

 A 



Litocorsa nr, 



Harpinia sp. A (a) 

 Syllis sp. A (p) 

 Spionidae spp. (p) 

 Pseudomesus sp. A. (i) 



163 

 148 



133 



104 



104 



) 89 



89 



74 



74 



59 



Sargassum 

 #/core 

 n = 2 



0,0 

 1,4 



1,0 

 0,0 

 2,0 

 0,1 

 3,6 

 2,1 

 2,1 

 1,0 



TOTAL 



1,896/sq m 



% 

 Ave. #/core contri- 

 #/sq m n = 2 bution 



TOTAL 



4,311/sq m. 



286 



