Vocalization development in common marmosets for neurodegenerative translational modeling

Area of Science:

• Primate vocalization
• Developmental biology
• Neuroscience

Background:

• Understanding vocal development is crucial for identifying communication deficits in neurodegenerative disease models.
• Common marmosets are emerging genetic models for studying neurodegenerative disorders.

Purpose of the Study:

• To analyze age-related changes in common marmoset vocalizations.
• To establish a naturalistic protocol for studying vocal development in marmosets for translational research.

Main Methods:

• Longitudinal audio-video recording of 19 developing common marmosets (1-149 days).
• Analysis of vocalizations (cry, tsik, trill, phee, trill-phee) for acoustic parameters (duration, frequency, bandwidth).
• Mixed model linear regressions to assess age effects on call parameters.

Main Results:

• Cry duration, maximum frequency, and bandwidth decreased with age.
• Tsik call duration decreased, while minimum and maximum frequencies increased with age.
• Trill call duration increased, and trill-phee bandwidth decreased with age.

Conclusions:

• Common marmoset vocal development is call-type dependent.
• A naturalistic protocol can effectively capture and analyze vocal changes without specialized equipment.
• This approach supports the study of vocal communication deficits in genetic models of neurodegenerative disorders.