PSYC 306 Lecture Notes - Lecture 73: Norway Lemming, Inclusive Fitness, Kisspeptin
Document Summary
Altruism + indirect selection: haldane, putting math to helping out kin, why put down life for sons or cousins, 1/2 related to his sons + 1/8 related to cousins so need 8. Fitness payoff: coefficient of relatedness, costs benefit analysis for helping. Hamilton"s rules: direct cost to you as a donor, number of offspring you aren"t producing based on your behaviour, r= parent offspring, always . 5=always direct cost to social donor, direct benefits must be lower than indirect costs. If the actor tasks the cost directly + influencing your own life: direct cost: number of offspring you are not directly reproducing. Kin selection: alarm calls= get predated more often, truly alturistic= doesn"t matter who its making the calls to. It matters: males leave their natal behaviour, females stay + make alarm calls more often. 50 x 0. 5 = 25: 25 = b x 0. 125, b=200, has to be greater than 200.
