Aging-Related Behavioral Patterns in Tibetan Macaques

Area of Science:

• Primatology
• Behavioral Ecology
• Gerontology

Background:

• Aging influences social behaviors in humans and nonhuman primates (NHPs).
• Understanding aging-related behavioral changes in NHPs can inform human aging research.
• The relationship between aging and social behavior in NHPs is not well understood.

Purpose of the Study:

• To investigate aging-related social behaviors in Tibetan macaques (Macaca thibetana) in their natural habitat.
• To identify age-related differences in social interaction patterns in male and female macaques.
• To explore the link between aging, social conflict, and social partner preference in macaques.

Main Methods:

• Observational study of 25 adult Tibetan macaques in Huangshan, China (October 2020 - June 2021).
• Utilized focal animal sampling and ad libitum sampling for behavioral data collection.
• Analyzed age-related changes in social interaction frequencies, including being attacked and approaching conspecifics.

Main Results:

• In adult female macaques, the frequency of being attacked decreased with age.
• Older female macaques showed a reduced frequency of approaching other monkeys.
• No significant age-related decrease in approaching conspecifics was observed in males.

Conclusions:

• Older female macaques demonstrate active conflict avoidance strategies.
• Reduced social approaches and conflict engagement may explain conflict avoidance in aging females.
• Macaca species may exhibit age-related social partner preferences, mirroring human patterns.