ANTH 1 Lecture Notes - Lecture 20: Gelada, Reproductive Rights, Orangutan
13 Oct 2020
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How available is food for a given group size? (type of food/seasonality, e. g. fruit and insects) One or more males, and multiple females. Food in small clumps = small groups. Large group may help fend off predators if small primates have high predation rates. Most common type of social group (harem) One male, multiple females, and their immature offspring. Ex: gelada baboon, some human cultures, gorilla, hamadryas. Sexual dimorphism = helps dominant male fight off foreign males. One male ensures reproductive rights to females. Foreign male drives out dominant male and kills his offspring. Females stay in their natal (birth) group. One female, multiple males, and their immature offspring. Only in some new world monkeys: callitrichidae (marmosets, Large groups = some are just helpers, not fathers. Don"t know if they are the father. Small primates die often due to predators. More parental help = better survival: multimale, multifemale (promiscuous) Male competition relatively low; sexual dimorphism low.
