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Alaska albacore amphipods animals auklets Baja Balaenoptera benthic Bering Sea Biol biomass breeding British Columbia California Current California Current region Carey catch caught cephalopods chaetognaths collected copepods Coryphaenoides deep-sea densities depth diel vertical migration Dohl dolphins eastern North Pacific eggs estimates euphausiids Family feeding ecology feeding habits females fish Fisheries Service 1984 fur seals Galapagos Rift Gonatus Gorda Ridge Gorda Ridge Lease Gorda Ridge Study growth gulls hydrothermal vents individuals per 103m3 km off Newport Krygier and Pearcy Kubodera and Jefferts larvae Laurs Leach's storm-petrels males Marine Fisheries Service marine mammals National Marine Fisheries northeastern Pacific northern California numbers occur offshore Oregon coast Oregon State University pacifica pelagic Phylum phytoplankton plankton polychaetes population Raymont reported reproduction Ridge Lease Area Ridge Study Area samples seabirds sexual maturity shelf shrimp spawning species specimens sperm whales squid storm-petrels tows Washington water column Willis and Pearcy winter zooplankton