The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder . easternberingsea00hood Year: 1981 20-22 • 56 90 120 150 50 r 40 30 20 10 Pups migrating from land 180 210 240 • 58 . 50 .53 51 ^/^ ^^^ y^ .52 • 55 .54 •57 •2022 _L _L 90 120 150 180 Number of pups 210 240 Figure 52-2. Yield-pup relation for male fur seals of the 1920-22 and 1950-70 year-classes from St. Paul Island (Lander 1979). Least squares regression lines are shown for pups bom (a = , b = ) and for pups mi- grating from land (a = , b = ).

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