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Table II. The mean coefficient of selection sbar[xm] in favor of the most productive fertility value xm and the normalized selection differential SD/s for fertility, where s is its standard deviation, in populations of various species.

    Species    s[xm], %    SD/s

    Oat    59-61    0.44–0.53

    Wheat    52–68    0.33–0.62

    Grouse    32    0.19

    Partridge    50    0.16

    Wood duck    45    0.28

    White-bellied swift    13    0.20

    Black swift    24–40    0.20–0.43

    Starling    12–22    0.18

    Great tit    21–53    0.21–0.32

    Blue tit    23    0.10

    Guinea pig    32    0.29

    Karakul sheep    46    0.33

    Human    50–62    0.08–0.10

    Total limits    12–68    0.08–0.62

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