Table 3. Ten most abundant taxa at Seawolf Disposal Mound - 150N and 150W, September 1997 





Rank 



Species 



Percent of 

 Total Fauna 



Density 

 (Ind. 0.04 m 2 ) 



1 



Nucula annulata (Stage II bivalve) 



59.84 





301 



2 



Mediomastus ambiseta (Stage I polychaete) 



8.55 





43 



3 



Prionospio steenstrupi (Stage I polychaete) 



6.76 





34 



4 



Anadara transversa (bivalve) 



2.58 





13 



5 



Ampharetidae spp.* (Stage I polychaete) 



1.79 





9 



6 



Nephtys incisa (Stage II/III polychaete) 



1.59 





8 



7 



Crepidula plana (gastropod) 



1.59 





8 



8 



Levinsenia gracilis (Stage III polychaete) 



1.39 





7 



9 



Ilyanassa trivittata (gastropod) 



1.19 





6 



10 



Pagiirus spp. (hermit crab) 



0.99 





5 





Total- 10 Taxa 



86.28 





434 





Remaining Fauna - 40 Taxa 



13.72 





69 





Total Fauna - 50 Taxa 



100.00 





503 



Seawolf Disposal Mound - 150W 



Rank 



Species 



Percent of 

 Total Fauna 



Density 

 (Ind. 0.12m" 2 ) 



1 



Prionospio steenstrupi (Stage I polychaete) 



26.07 





55 



2 



Nucula annulata (Stage II bivalve) 



13.74 





29 



3 



Mediomastus ambiseta (Stage I polychaete) 



10.43 





22 



4 



Tharyx acutus (Stage I polychaete) 



4.27 





9 



5 



Crepidula plana (gastropod) 



4.27 





9 



6 



Ampelisca vadorum (Stage II amphipod) 



3.32 





7 



7 



Erichthonius brasiliensis (amphipod) 



3.32 





7 



8 



Dipolydora socialis (Stage I polychaete) 



2.84 





6 



9 



Nephtys incisa (Stage II/III polychaete) 



2.37 





5 



10 



Ilyanassa trivittata (gastropod) 



2.37 





5 



10 



Ampelisca abdita (Stage II amphipod) 



2.37 





5 





Total - 1 1 Taxa 



75.36 





159 





Remaining Fauna - 35 Taxa 



24.64 





52 





Total Fauna - 46 Taxa 



100.00 





211 



* Taxon excluded from diversity analysis. Incompletely identified taxa were used in diversity analyses only when species belonging to those taxa 

 were absent from the sample. 



