. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder . 175° 170° 165' 160° Figure 69-8. Quantitative distribution of total infauna talcen by van Veen grab in tiie southeastern Bering Sea, 1975-76. on small, soft-shell genera such as Nucula, Nuculana, Yoldia, Macoma, and Axinopsida, they do not generally feed on bivalves as intensively as red king crab in the Bering Sea (Feder and Jewett 1980). And yet high densities of Chionoecetes opilio in the southeastern Bering Sea occur where bivalves are common (Figs. 69-7 and 69-9). The data (Feder an
. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder . 175° 170° 165' 160° Figure 69-8. Quantitative distribution of total infauna talcen by van Veen grab in tiie southeastern Bering Sea, 1975-76. on small, soft-shell genera such as Nucula, Nuculana, Yoldia, Macoma, and Axinopsida, they do not generally feed on bivalves as intensively as red king crab in the Bering Sea (Feder and Jewett 1980). And yet high densities of Chionoecetes opilio in the southeastern Bering Sea occur where bivalves are common (Figs. 69-7 and 69-9). The data (Feder and Jewett 1980; Jewett and Feder, Chapter 65, this volume) indicate that foraging areas of C. opilio and P. camtschatica, in general, do not overlap (Figs. 69-9 and 69-10); thus predation pressure on bivalves they both use as food is reduced. Sea stars and flatfishes prey on at least ten differ- ent bivalve species, of which more than half are also consumed by king or snow crabs, or both (Table 69-1; see adso McDonald et Chapter 66, this volume for a discussion of clam distribution, abun- dance, and age as influenced by benthic predators). Hatanaka and Kosaka (1958) demonstrated that sea stars and bottom fishes compete for bivalve resources in Sendai Bay, Japan. They estimated that food (primarily clams) consumed annually by the sea star Asterias amurensis amounted to 8 X 10^ mt, approximating the annual consumption (10 X 10^ mt) of food (primarily clams) taken by bottom fishes. In the northern portion of the Bering
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