09/21/2015 Primate Social Behaviors

09/21/2015 Primate Social Behaviors - Primate Social...

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Primate Social Behaviors 09/21/2015 Why live in groups? 1. Ecological benefits (improved access to food, protection from predators) 2. Reproductive benefits (better access to mates, assistance in rearing offspring) Access to Food Find location of food Defense of food sources Distribution of food Patchy in distribution (fruits) small patches → small groups large patches → large groups Evenly distributed (leaves) large groups Protection from Predators Warning from group members Each individual is of less risk in the group Defense Access to Mates females vs males: different reproductive strategies quality vs quantity of mates/offspring Females Males gestation and lactation limited number of offspring per lifetime (limited by cycle time and food resources) sure offspring are their own large investment of time & energy caring for each offspring only provide sperm unlimited number of offspring per lifetime, limited only by
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