The Eastern Bering Sea Shelf The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder easternberingsea00hood Year: 1981 Bivalve mollusks 1167 180° 175' 170° 165° 160' 155' 175' 170° 165° 160' Figure 66-9. Qualitative distribution of Nucula tenuis taken in the southeastern Bering Sea by van Veen grab (Feder et al. 1980). Collection: Eighty-nine percent of Y. amygdalea occurred in very fine sand to medium silt () with 89 percent of the clams at sediment sorting values from to (Table 66-6). Ninety-two percent of Y. amygdalea occu
The Eastern Bering Sea Shelf The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder easternberingsea00hood Year: 1981 Bivalve mollusks 1167 180° 175' 170° 165° 160' 155' 175' 170° 165° 160' Figure 66-9. Qualitative distribution of Nucula tenuis taken in the southeastern Bering Sea by van Veen grab (Feder et al. 1980). Collection: Eighty-nine percent of Y. amygdalea occurred in very fine sand to medium silt () with 89 percent of the clams at sediment sorting values from to (Table 66-6). Ninety-two percent of Y. amygdalea occurred from 50 to 100 m (Table 66-7). Minor Component of Collection: One percent of the clams occurred in medium to fine sand (), 3 percent in fine to very fine sand () and 7 percent in medium silt () with 3 percent of the species at sediment sorting values of , 1 percent at >, and 7 percent at > Seven percent of Y. amygdalea occurred at depths of 100-125 m and 1 percent at 150->175m (medium silt). Macoma calcarea was mainly distributed on the southern portion of the southeastern shelf but extended north and west into the outer shelf and immediately adjacent to the central shelf (Figs. 66-1, 66-14, and 66-15). The greatest abundance of this species occurred at Stations 10, 12, 28, 45, 63, 64, 65, 70A, 71, and 83 (Figs. 66-1, 66-14, and 66-15; Table 66-4). The species was present at 23 percent of the stations sampled by van Veen grab. The greatest biomass occurred at Stations 10, 22, 45, 63, and 64. Macoma calcarea was associated with sediment types ranging from medium sand to medium silt (; Tables 66-1 and 66-2; Figs. 66-2 to 66-6, 66-14 and 66-15; Table 66-6). Major Compon- ent of Collection: Ninety-four percent of M. calcarea occurred in very fine sand to medium silt ( ) with 98 percent of the clams at sediment sorting values from > to (Table 66-6). Ninety- seven percent of M. calcarea occurre
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