LIFESCI 3C03 Chapter Notes - Chapter 6: Evolutionarily Stable Strategy, Railways Act 1921, Waggle Dance
20 Sep 2016
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Hunting in a group may improve ability to capture prey. Lions hunt in specific positions, with individual specializations as right or left wing or center; hunts were more successful when lionesses were in preferred positions. May be an optimal group size trade off b/w protection from predators/foraging success vs increased resource competition/disease. Optimal group sizes may not be stable: newcomers join an existing group so that it is larger than optimal, until it is more beneficial for newcomers to be alone. Skew theory: subordinate individuals will put up with lower pay-offs until they can do better by moving somewhere else. Skew models consider effects of groups on individual fitness. Dominant individuals may have complete control of reproduction in the group; if a subordinate disobeys this then the dominant can do something (ex. Evict them from the group), so subordinate individuals tend to retrain reproduction. If dominant individual is not in control, there will be conflict over reproductive shares.
