Maternal Decision-Making in Non-Mother Caregiving Negotiation for Infants in Black-and-White Snub-Nosed Monkeys
Chun-Yan Cui1,2,3,4, Jing Sun1,5, Jian-Dong Lai6
1Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming, Yunnan, China.
American Journal of Primatology
|March 12, 2025
Summary
Mothers negotiate infant care with other females, allowing allomaternal care based on infant age and caregiver experience. This reduces maternal costs and benefits non-mother involvement in primate societies.
Area of Science:
- Primate ethology
- Behavioral ecology
- Social cognition
Background:
- Allomaternal care is common in primates, but maternal consent dynamics are understudied.
- Maternal decision-making is crucial for regulating non-mother caregiving.
- Understanding these negotiations offers insights into primate social structures.
Purpose of the Study:
- Introduce and define "non-mother caregiving negotiation" in primates.
- Investigate signaling behaviors used by non-maternal females to solicit infant care.
- Examine maternal factors influencing consent for allomaternal care.
Main Methods:
- Observational study of a semi-provisioned black-and-white snub-nosed monkey (Rhinopithecus bieti) group.
- Analysis of signaling behaviors by non-maternal females towards mothers and infants.
- Correlation of maternal consent with infant age and non-maternal female experience.
Main Results:
- Non-maternal females use specific signals (grooming, touching, gentle manipulation) to request infant care.
- Maternal consent is influenced by infant age and caregiver experience, favoring older infants and experienced females.
- Infants are frequently transferred among multiple caregivers within a single event (avg. 2.2 transfers, 2.5 caregivers).
Conclusions:
- Non-mother caregiving negotiation is a communicative process between mothers and potential caregivers.
- This negotiation reduces maternal burden and allows non-mothers to gain caregiving experience.
- Findings provide novel insights into primate caregiving systems and social dynamics.
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