Social development in nursery-reared pigtailed macaques (Macaca nemestrina)

Area of Science:

• Primate social development
• Animal behavior research
• Laboratory primate husbandry

Background:

• Understanding social development in non-human primates is crucial for laboratory settings.
• Nursery-reared pigtailed macaques (Macaca nemestrina) require specific husbandry to ensure normal behavioral repertoires.
• Early life experiences significantly shape social behavior in developing primates.

Purpose of the Study:

• To document social development trends in nursery-reared pigtailed macaques (Macaca nemestrina) from 4 to 32 postnatal weeks.
• To evaluate the impact of specific husbandry practices on early social behavior.
• To identify factors influencing the development of species-typical behaviors in laboratory-reared infants.

Main Methods:

• Studied 240 nursery-reared pigtailed macaques (Macaca nemestrina) from 4 to 32 weeks of age.
• Infants were housed singly with daily peer access for social interaction.
• Observed developmental trends and behavioral time budgets, noting effects of weaning and comforter removal.

Main Results:

• Play and social behaviors emerged early and increased throughout the study period.
• Disturbance behaviors decreased significantly by 8 months of age.
• Weaning from infant formula between 16-19 weeks retarded play behavior development; comforter removal had no lasting effects.

Conclusions:

• Laboratory-reared pigtailed macaques (Macaca nemestrina) exhibit species-typical social behavioral repertoires by 8 months of age.
• Husbandry factors like weaning timing can influence specific aspects of social development.
• Controlled peer interaction supports the development of normal social behaviors in nursery-reared macaques.