BIOL 307 Lecture Notes - Lecture 20: Gene-Centered View Of Evolution, Kin Selection, Inclusive Fitness
7 Jun 2019
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Themes of today"s lecture: the evolution of cooperation. Selfish gene theory: idea that successful genes are those that pass on many copies of themselves to future generations: unselfish, altruistic cooperation? i. e. leaf cutter ants. Manipulation by recipient: example: cuckoos = egg dumping (worry the eggs aren"t their own) by starlings (altruist is duped) Mutualism and individual benefit: all individuals gain by cooperating, so we have cooperation but not altruism, cooperate is the ess, e. g tasks that need team-work for success, such as lions hunting big prey. Kin selection: kin selection: characteristics are favoured due to benefiting close relatives. Indirect fitness: fitness gained from aiding non-descendent kin. Haldane: would you lay down your life to save your drowning brother, no, but i would to save two brothers or eight cousins, hamilton"s rule: Rc = coefficient of relatedness to actor"s offspring. Rb = coefficient of relatedness to recipient"s offspring.
