In contrast to humans and songbirds, there is limited evidence of vocal learning in nonhuman primates. While previous studies suggested that primate vocalizations exhibit developmental changes, detailed analyses of the extent and time course of such changes across a species’ vocal repertoire remain limited. In a highly vocal primate, the common marmoset (Callithrix jacchus), we studied developmental changes in the acoustic structure of species-specific communication sounds produced in a social setting. We performed detailed acoustic analyses of the spectral and temporal characteristics of marmoset vocalizations during development, comparing differences between genders and twin pairs, as well as with vocalizations from adult marmosets residing in the same colony. Our analyses revealed significant changes in spectral and temporal features as well as variability of particular call types over time. Infant and juvenile vocalizations changed progressively toward the vocalizations produced by adult marmosets. Call types observed early in development that were unique to infants disappeared gradually with age, while vocal exchanges with conspecifics emerged. Our observations clearly indicate that marmoset vocalizations undergo both qualitative and quantitative postnatal changes, establishing the basis for further studies to delineate contributions from maturation of the vocal apparatus and behavioral experience.

1.
Agamaite
,
J. A.
(
1997
). “
A quantitative characterization of the vocal repertoire of the common marmoset
,” Master’s thesis,
Johns Hopkins University
, Baltimore, MD.
2.
Biben
,
M.
and
Bernhards
,
D.
(
1995
). “
Vocal ontogeny of the Squirrel Monkey, Saimiri boliviensis peruviensis
,” in
Current Topics in Primate Vocal Communication
, edited by
Zimmerman
,
E.
,
Newman
,
J. D.
, and
Jurgens
,
U.
, (
Plenum
,
New York
), pp.
99
120
.
3.
Egnor
,
S. E. R.
and
Hauser
,
M. D.
(
2004
). “
A paradox in the evolution of primate vocal learning
,”
Trends Neurosci.
27
,
649
654
.
4.
Epple
,
G.
(
1968
). “
Comparative studies on vocalization in marmoset monkeys (Hapalidae)
,”
Folia Primatol.
8
,
1
40
.
5.
Fischer
,
J.
,
Cheney
,
D. L.
, and
Seyfarth
,
R. M.
(
2000
). “
Development of infant baboons’ responses to graded bark variants
,”
Proc. R. Soc. London, Ser. B
267
,
2317
2321
.
6.
Fischer
,
J.
(
2003
). “
Developmental modification in the vocal behavior of non-human primates
,” in
Primate Audition: Ethology and Neurobiology
, edited by
A. A.
Ghazanfar
(
CRC Press
,
Boca Raton
), pp.
109
125
.
7.
Hammerschmidt
,
K.
,
Newman
,
J. D.
,
Champoux
,
M.
, and
Suomi
,
S. J.
(
2000
). “
Changes in rhesus macaque ‘coo’ vocalizations during early development
,”
Ethology
106
,
873
886
.
8.
Hammerschmidt
,
K.
,
Freudenstein
,
T.
, and
Jürgens
,
U.
(
2001
). “
Vocal development in squirrel monkeys
,”
Behaviour
138
,
1179
1204
.
9.
Inoue
,
M.
(
1988
). “
Age gradations in vocalization and body weight in Japanese monkeys (Macaca fuscata)
,”
Folia Primatol.
51
,
76
86
.
10.
Kalin
,
N. H.
and
Shelton
,
S. E.
(
1998
). “
Ontogeny and stability of separation and threat-induced defensive behaviors in rhesus monkeys during the first year of life
,”
Am. J. Primatol
44
,
125
135
.
11.
Masataka
,
N.
(
1993
). “
Effects of contingent and noncontingent maternal stimulation on the vocal behaviour of three—to four-month-old Japanese infants
,”
J. Child Lang
20
,
303
312
.
12.
McCowan
,
B.
,
Franceschini
,
N. V.
, and
Vicino
,
G. A.
(
2001
). “
Age differences and developmental trends in alarm peep responses by squirrel monkeys (Saimiri sciureus)
,”
Am. J. Primatol
53
,
19
31
.
13.
Merker
,
B.
and
Cox
,
C.
(
1999
). “
Development of the female great call in Hylobates gabriellae: A case study
,”
Folia Primatol.
70
,
97
106
.
14.
Miller
,
C. T.
and
Wang
,
X.
(
2006
). “
Sensory-motor interactions modulate a primate vocal behavior: Antiphonal calling in common marmosets
,”
J. Comp. Physiol., A
192
,
27
38
.
15.
Moody
,
M. I.
and
Menzel
,
E. W.
, Jr.
(
1976
). “
Vocalizations and their behavioral contexts in the tamarin Saguinus fuscicollis
,”
Folia Primatol.
25
,
73
94
.
16.
Newman
,
J. D.
and
Symmes
,
D.
(
1974
). “
Vocal pathology in socially deprived monkeys
,”
Dev. Psychobiol.
7
,
351
358
.
17.
Newman
,
J. D.
(
1995
). “
Vocal Ontogeny in Macaques and Marmosets: Convergent and Divergent Lines of Development
,” in
Current Topics in Primate Vocal Communication
, edited by
E.
Zimmerman
,
J. D.
Newman
, and
U.
Jurgens
(
Plenum
,
New York
), pp.
73
97
.
18.
Norcross
,
J. L.
and
Newman
,
J. D.
(
1993
). “
Context and gender-specific differences in the acoustic structure of common Marmoset (Callithrix jacchus) Phee calls
,”
Am. J. Primatol
30
,
37
54
.
19.
Norcross
,
J. L.
and
Newman
,
J. D.
(
1997
), “
Social context affects phee call production by nonreproductive common marmosets (Callithrix jacchus)
,”
Am. J. Primatol
43
,
135
145
.
20.
Owren
,
M. J.
,
Dieter
,
J. A.
,
Seyfarth
,
R. M.
, and
Cheney
,
D. L.
(
1992
). “
Food’ calls produced by adult female rhesus (Macaca mulatta) and Japanese (M. fuscata) macaques, their normally-raised offspring, and offspring cross-fostered between species
,”
Behaviour
120
,
218
231
.
21.
Owren
,
M. J.
,
Dieter
,
J. A.
,
Seyfarth
,
R. M.
, and
Cheney
,
D. L.
(
1993
). “
Vocalizations of rhesus (Macaca mulatta) and Japanese (M. fuscata) macaques cross-fostered between species show evidence of only limited modification
,”
Dev. Psychobiol.
26
,
389
406
.
22.
Schrader
,
L.
and
Todt
,
D.
(
1993
). “
Contact call parameters covary with social context in common marmosets, Callithrix j. jacchus
,”
Anim. Behav.
46
,
1026
1028
.
23.
Seyfarth
,
R. M.
and
Cheney
,
D. L.
(
1986
). “
Vocal development in vervet monkeys
,”
Anim. Behav.
34
,
1640
1658
.
24.
Seyfarth
,
R. M.
and
Cheney
,
D. L.
(
1997
). “
Some general features of vocal development in nonhuman primates
,” in
Social Influences on Vocal Development
, edited by
C. T.
Snowdon
and
M.
Hausberger
(
Cambridge University Press
,
U.K.
), pp.
249
273
.
25.
Snowdon
,
C. T.
(
1997
). “
Affiliative processes and vocal development
,”
Ann. N.Y. Acad. Sci.
807
,
340
351
.
26.
Snowdon
,
C. T.
,
Elowson
,
A. M.
, and
Roush
,
R. S.
(
1997
). “
Social influences on vocal development in New World Primates
,” in
Social Influences on Vocal Development
, edited by
C. T.
Snowdon
and
M.
Hausberger
(
Cambridge University Press
,
U.K.
), pp.
234
248
.
27.
Snowdon
,
C. T.
and
Elowson
,
A. M.
(
2001
). “
’Babbling’ in pygmy marmosets: Development after infancy
,”
Behaviour
138
,
1235
1248
.
28.
Stevenson
,
M. F.
and
Poole
,
T. B.
(
1976
). “
An ethogram of the common Marmoset (Callithrix jacchus jacchus): General behavioural repertoire
,”
Anim. Behav.
24
,
428
451
.
29.
Winter
,
P.
(
1969
). “
The variability of peep and twit calls in captive squirrel monkeys (Saimiri sciureus)
,”
Folia Primatol.
10
,
204
215
.
30.
Winter
,
P.
,
Handley
,
P.
,
Ploog
,
D.
, and
Schott
,
D.
(
1973
). “
Ontogeny of squirrel monkey calls under normal conditions and under acoustic isolation
,”
Behaviour
47
,
230
239
.
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