ANTH 011 Lecture Notes - Lecture 18: Biological Anthropology, Life Time Fitness
29 Sep 2020
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Document Summary
Costs of sociality significant costs of living in a group. Primates live in groups because groups are more successful in defending access to resources than lone individuals. Joint defense of food resources is profitable when: Food sources are clumped in space and time. There is enough food within defended patches to meet the needs of several individuals. Thus, between-group competition over food resources favor groups. Larger groups generally are more successful in fights over resources than small groups. Problem with resource defense model (defense of resources) Rdm doesn"t explain why folivores live in large groups. Group living evolved as a defense against predators. A wide array of predators hunt primates, and predation is thought to be significant source of mortality among wild primates. Juveniles have a higher mortality rate in smaller groups than in larger groups. Primate mothers are almost always the primary (if not exclusive) caretakers of. The behavior of fathers is much more variable offspring.
