BIOC54H3 Chapter 13: Chapter 13
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O competition of food: energetic and time cost of dominance interactions (social status) Social behaviours agnostic or submissive (most of the time) Benefits of group living protection against predators defending their young, cooperation is not required predicts that mobbing is intense when nesting is dense, so protection is increased. Improve predation ability: future offspring (direct fitness, through kin (indirect) Chapter 13: cost of group living, favoured when environmental constraint reduce likelihood if independent success. Altruism: habitat saturation, shortage of mates. If there is a single round always defect again or defect (pavlov: example of reciprocal altruism grooming in monkeys. Cooperate first, defect if partner defects (tit for tat: context 1: monkeys related and unrelated groom each other. Hypothesis: amongst related altruistic: unrelated: reciprocal altruism, predicts unrelated groomers must get other benefit, context 2: monkeys use vocal calls to solicid aid in aggressive alliances. Unrelated: monkey b get more attention from a when b has groomed a recently.