FIGURE 6c. Fur seal sightings per hour of observation, Sep. 80 170 57 口 52 47 42 42 37 120 32 62 57 52 47 42 140 130 120 (Kajimura 1980) 170 160 150 Dec. 1958-74. FIGURE Fur seal sightings in the North Pacific Ocean by Japan, Canada and the United States, 1955-79. Kajimura (1982). Composition (percent) of diet of fur seals by prey species in the eastern Bering Sea during 1958-74 (A) for pooled June-October samples, using modified volume (dark bars) and energy-adjusted modified volume; (B) by month using modified volume (number of stomachs containing food by month is also indicated); and (C) by subregion, with pooled June-October samples using modified volume (number of stomachs containing food by subregion is also indicated). A dark line separates squid and fish categories in the latter two figures. Key: ATK = Atka mackerel; BER = Berryteuthis magister; CAP = capelin; DEE = deep-sea smelts; GTP = Gonatopsis borealis; HER = Pacific herring; MF = minor fish species; OP = other prey; POL walleye pollock. (from Perez and Bigg 1984) = Total all nations 1500 1250 1000 750 500 U.S.S.R. Japan 250 Other nations 1954 56 2250 2000 1750 Total all species 1500 Pollock 1250 60 62 64 66 68 70 72 74 76 78 80 82 Years FIGURE 9. Foreign catches of groundfish in the eastern Bering Sea |