Figure 12. Schematic of the pelagic food webs within and on the shelf outside Prince William Sound, Alaska with herring, salmon (esp. juveniles), pollock, zooplankton (ZP), birds and mammals. Solid narrow arrows show trophic pathways between species. Dashed narrow arrows show cannibalism. Fat black arrow shows emmigration of juvenile salmon from PWS to the shelf. Fat gray arrows show exchanges of zooplankton between the deep ocean, shelf and PWS. That food web on the shelf (shaded) and the exchange of plankton and nutrients between the deep ocean and the shelf will be the focus of U.S. GLOBEC CGOA studies. (From U.S. GLOBEC Report No. 16; 1996).