Biology 1001A Lecture Notes - Lecture 17: Reciprocal Altruism
8 Apr 2018
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Behaviours that appear to reduce individual tnesses, are actually favoured kin selection (ex: helping related non-descendants) Even closely related individuals might experience con ict. Favours the spread of helpful behaviours as long as the bene ts to the individual you"re helping x relatedness is larger than your direct tness (rb>c) A bird has the opportunity to help its parents raise 4 siblings, or nd a mate of its own and produce 2 offsprings. Can also think of this as helping parent at a cost to your direct tness. B = 4 offspring for each parent. Total rb = 0. 5 x 8 = 4. Whether you think of the next generation or current generation, you will arrive at the same decision ( about whether or not the helpful behaviour is favoured by kin selection) Individuals have overlapping, but not identical, genetic interests with relatedness. Asymmetry in relatedness = disagree over when helpful behaviour is appropriate.
