Banca de DEFESA: JOSÉ FIRMINO RODRIGUES NETO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : JOSÉ FIRMINO RODRIGUES NETO
DATE: 26/05/2026
TIME: 08:00
LOCAL: https://meet.google.com/yay-rkqi-vip
TITLE:

Acoustic feedback shapes context-specific vocal plasticity in marmosets

KEY WORDS:

vocal learning; vocal usage learning; marmoset; contingent feedback; sensitive period; generalization; cooperative breeding;

 

PAGES: 126
BIG AREA: Ciências Biológicas
AREA: Fisiologia
SUMMARY:

Vocal usage learning — the modification of when and in what context a call is produced — is well documented in some birds but has never been experimentally demonstrated in a nonhuman primate. Here we manipulated contingent acoustic feedback in infant common marmosets (Common marmoset; n = 9) without altering the rearing environment. In each twin pair, one infant received natural parental feedback to phee calls in the alone-with-curtain context (control), whereas the other received inverted feedback reinforcing trill calls instead (switch). Across postnatal development, switch infants produced fewer phees and more trills in the target context, while phee acoustic structure shifted toward trill-like features. These effects were strongest during the active feedback period, consistent with a sensitive developmental window. Learning generalized beyond the reinforced call type: twitter production also diverged between groups, and vocal sequence organization was reorganized. Cross-lag analyses revealed a substitution dynamic between phee and twitter calls. Together, these results provide the first experimental evidence of vocal usage learning in a marmoset monkeys and show that contingent feedback can jointly shape vocal usage, acoustic structure, and generalized vocal behavior.

 

COMMITTEE MEMBERS:
Externa à Instituição - YISI ZHANG
Externa à Instituição - DIANA APRIL LIAO
Presidente - 3086031 - DANIEL YASUMASA TAKAHASHI
Externo à Instituição - EDGARD MORYA - IIN-ELS
Interno - 1698305 - RODRIGO NEVES ROMCY PEREIRA
Interno - 2183828 - TARCISO ANDRE FERREIRA VELHO