NATR 320 Lecture Notes - Lecture 32: Inclusive Fitness, Alarm Call, Haplodiploidy
6 Oct 2020
School
Department
Course
Professor
Document Summary
Altruistic acts are actually selfish if you scratch my back i"ll scratch yours . Such reciprocity is favored when: the benefit of the recipient is greater than the cost to the actor, there are frequent opportunities for repayment, individuals can recognize each other and remember past behaviour. People who gain a reputation as more helpful are more likely to receive help when they need it. Experiment 1: how belding"s ground squirrels respond to terrestrial predators. William hamilton suggests how relatedness interacts with costs and benefits to determine whether to act altruistically. Relatedness describes how many alleles, on average, 2 individuals have in common. Can be quantified: coefficient of relatedness r. A man shares more genes via inheritance w his uncle than cousin. A woman shares the same amount of genes (average) w child and sibling. Evolution benefits behaviours where the evolutionary benefit fitness gain exceeds the cost.
