BIOLOGY 1M03 Lecture Notes - Lecture 15: Homo Ergaster, Physical Body, Stone Tool
14 Mar 2017
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Document Summary
Complex foraging: collection (chimps primarily collected, extraction, hunting (humans primarily hunted) In women, their peak of production while menopause; until then, they are using resources. Less competition between males; they spend more time raising offspring: reduced sexual dimorphism (teeth) Why share: vampire bats regurgitate food for other non-kin members of their group to avoid starvation, some, exchange food for sex. In some cannibalistic species the male may provide food to the female before copulation: success of hunting is unpredictable and requires teamwork, nutritional benefits from a diverse diet, specialization for hunting improves efficiency. Distribution of food: effects on social system: food isn"t evenly distributed, the variation in the density of food patches and also distance between food patches, bonobos evolved without much competition with other apes. What influences group size: distribution of food resources which influence social structure, clumped food resources lead to competition (hierarchy, aggression, sexual selection, trade-off between group size and success.
