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Lecture 13: Primate Social Behavior

Lecture 13: Primate Social Behavior

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Lecture 13: Primate Social Behavior
Introduction to Primate Sociality
Most Primates Live in Social Groups
Why Are Primates Social?
Benefits of Social Living
Costs of Being Social
Simplified Model of Primate Socioecology
Major Types of Social Groups
Four Basic Social Group Types
Reality is More Complicated: Multilevel Societies
Reality is More Complicated: Cooperative Breeding in Callitrichids
Reality is More Complicated: Within-Species Variation
Dispersal Patterns
Key Variable: Who Stays, Who Leaves?
Male Philopatry
Female Philopatry
Effects of Staying in Natal Group
Effects of Leaving Natal Group
Between-Group Social Dynamics
Intergroup Encounters
Territorial Boundary Patrolling
Within-Group Social Dynamics
Affiliative Behaviors
Aggressive Behaviors
Dominance Rank
Dominance Rank in Detail
What Determines Dominance?
Constructing a Dominance Matrix
Primate Reproductive Strategies
Defining Reproductive Strategies
Heavy Female Parental Investment
Variation in Female Reproductive Success by Rank
Individual Variation in Female Reproductive Success
The Value of Long-Term Behavioral Data
Male Reproductive Strategies
Fundamental Difference
Sexual Selection
Two Types of Sexual Selection
Intrasexual Selection: Sexual Dimorphism
Intrasexual Selection: Sperm Competition
Extreme Example: Chimpanzee Testicles
Infanticide
Infanticide as Sexual Selection
Female Counterstrategies to Infanticide
Male Reproductive Success in Multimale Groups
Reproductive Skew
Muriqui: An Interesting Exception
Muriqui Social Behavior
Egalitarian Primate Society
Further Study Opportunities
Professor Karen Strier’s Courses at UW-Madison
Connections to Course Themes
Building on Previous Lectures
Key Takeaways
Related course material