Primate socioecology: new insights from males

Area of Science:

• Primate socioecology
• Evolutionary anthropology
• Behavioral ecology

Background:

• Primate male behavior has been understudied in socioecological research.
• Ecological factors like resources and predation influence primate social systems.
• Life history traits and social factors, including sexual coercion, also significantly impact social evolution.

Purpose of the Study:

• To review recent studies on adult male primate behavior and their role in social evolution.
• To examine how male behavior influences group size, composition, and social dynamics.
• To explore the impact of infanticide risk on primate social evolution.

Main Methods:

• Literature review of new studies on primate male behavior.
• Analysis of factors determining group size, composition, and social behavior.
• Examination of male behavior at three levels: male-female associations, male group composition, and intra- and intersexual relationships.

Main Results:

• Primate social systems are shaped by both ecological factors and life history/social factors like sexual coercion.
• Male behavior plays a critical role in determining group size, composition, and social dynamics.
• Evidence suggests infanticide risk has been a major evolutionary force in primate social systems.

Conclusions:

• Male behavior is a crucial determinant of primate social evolution, alongside ecological pressures.
• Infanticide risk is a pervasive factor influencing primate social structures and male reproductive strategies.
• Further research on male life histories is needed to understand reproductive strategies and female counter-strategies.