ANTHRBIO 201 1st EditionLecture 12Kin groups in monkeys and apes matrilineal group structure in old world monkeys female bonded patrilineal group structure in chimpanzeesKincorrelated behaviors grooming coalitions III. Natural selection and the paradox of altruismDarwin’s perspective every structure is useful to the possessor genes are shared fitness of others due to the help of ego and devalued by the degree of relatedness between ego and recipient conditions favoring the evolution of altruism B=benefit to therecipient C=cost of the donor r=coefficient of relatedness rB>CA counterexample of apparently altruistic behavior: alliances If an individual helps another at relatively little cost today,but later receives “repayment” from the recipient, then the actor will experience a net reproductive benefit from its initial behavior. Conditions favoring the evolution of reciprocal altruism individuals interact often are capable of remembering who supported them in the pastsupport only those who help them chimpanzees share meat
View Full Document
Unlocking...