Preliminary data on voluntary food sharing in brown capuchin monkeys

Area of Science:

• Primate Behavior
• Animal Social Dynamics
• Ethology

Background:

• Social interactions and food transfer dynamics are crucial for understanding primate social structures.
• Captive group settings provide opportunities to observe naturalistic behaviors under controlled conditions.

Purpose of the Study:

• To investigate spontaneous food transfer behaviors in a captive group of capuchin monkeys (Cebus apella).
• To differentiate between forced food transfers and voluntary sharing.
• To examine the conditions and frequency of food sharing, including active food offering.

Main Methods:

• Observational study of spontaneous food interactions in a captive Cebus apella group.
• Categorization of food transfer events into forced claims and peaceful sharing.
• Experimental manipulation with adjacent cages to assess voluntary food sharing under controlled conditions.

Main Results:

• Food interactions included 7.2% forced claims and 20.3% peaceful sharing out of 3,389 total interactions.
• Sharing encompassed various forms, with collecting discarded items being most frequent and active giving least frequent.
• In experiments, sharing occurred in all 18 tests, with active food pushing through a partition observed in 10 instances.

Conclusions:

• Capuchin monkeys demonstrate complex food sharing behaviors, including voluntary transfers.
• Social dynamics and individual willingness to share influence food transfer patterns.
• The study highlights the propensity for sharing in Cebus apella, even when costly or easily preventable.