Anthropology 2265F/G Lecture Notes - Lecture 8: Patrilocal Residence, Bonobo, Patrilineality
14 Sep 2017
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Male guinea baboons in aggressive encounter (the male on the left is clearly lunging and making an open-mouth threat face; the male on the right is withdrawing, grimacing, and trying to avoid the lunge of the other male). Male hamadryas baboon (papio hamadryas), on left, grooms a female, whose infant is nearby. Male olive baboon (papio anubis), on right, in affiliative encounter with nursing female and her infant. Primate males don"t face the energetic demands of females (i. e. , both pregnancy and lactation obviously). Yet, male primates (including in homo sapiens) tend to experience lower survivorship relative to females -- this fact has contributed to the so-called frail male hypothesis. Survival curves for male and female japanese macaques (macaca fuscata), including all causes of death and disappearances [from the arishiyama west study population in texas]. Points indicate survival through a one-year interval, so the first points show survivorship from age 0 to 1 year.
