Vocal behavior of black‐fronted titi monkeys (Callicebus nigrifrons): Acoustic properties and behavioral contexts of loud calls
Abstract
Loud calls can be heard over long distances due to their high amplitude and low frequency. These calls are commonly used for both within- and between-group communication in many bird and primate species. In the Neotropics, mated pairs of socially monogamous titi monkeys (genus Callicebus) emit conspicuous, coordinated loud calls. These vocalizations appear to play a role in territorial defense, a hypothesis derived from studies of only three of the 31 recognized Callicebus species. Here, we describe the acoustic properties and organization of the loud calls of black-fronted titi monkeys (Callicebus nigrifrons). We compare the behavioral and ecological contexts associated with these vocalizations to investigate their role in within- and between-group communication, resource defense, and mate defense. Black-fronted titi monkeys create loud calls by combining a finite number of syllables to form more complex phrases, which are assembled to compose long sequences of loud calls. Bioacoustic features distinguish the loud calls used in different contexts, involving communication within- and between-groups. We found support for the hypothesis that vocalizations used for between-group communication are cooperative displays used by the mated pair and other group members to regulate access to important food resources, such as fruits. On the other hand, we only found weak support for the mate defense hypothesis.
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Studies in other taxa such as birds, mammals, amphibians and arthropods suggest the context of acoustic signal production is an important factor affecting the parameters of acoustic signals measured.
“Studies in other taxa such as birds (Stowell et al. 2017), mammals (Feighny et al. 2006; Caselli et al. 2014), amphibians (Toledo et al. 2015) and arthropods (Fukutomi and Ogawa 2017; Dobai et al. 2018; Kerchev 2019) suggest the context of acoustic signal production is an important factor affecting the parameters of acoustic signals measured.”
From Roars, Rumbles, and Resonance: A Systematic Review and Meta‐Analysis of Crocodylian Acoustic Signals (2026) · cites this paper as Caselli et al. 2014
Cites
R: A Language and Environment for Statistical Computing
R Core Team (2000) · doi:10.32614/r.manuals · Cited by 355,706 · see citing works
Modern Applied Statistics with S
Venables, W., & Ripley, B. (2010) · Statisctics and computing/Statistics and computing · doi:10.1007/978-0-387-21706-2 · Cited by 16,188 · see citing works
Observational study of behavior: sampling methods
Altmann, J. (1974) · Behaviour · doi:10.1163/156853974x00534 · Cited by 13,891 · see citing works
Sequential Analysis and Observational Methods for the Behavioral Sciences
Bakeman, R. A., & Quera, V. (2011) · Cambridge University Press eBooks · doi:10.1017/cbo9781139017343 · Cited by 845 · see citing works
Principles of Animal Communication
Howard, R. W. (1999) · American Entomologist · doi:10.1093/ae/45.2.126 · Cited by 736 · see citing works
Primates : studies in adaptation and variability
Dolhinow, P. J. (1968) · Holt, Rinehart and Winston eBooks · Cited by 627 · see citing works
Wilson, M. L., HAUSER, M. D., & Wrangham, R. W. (2001) · Animal Behaviour · doi:10.1006/anbe.2000.1706 · Cited by 478 · see citing works
A review of hypotheses for the functions of avian duetting
Hall, M. L. (2004) · Behavioral Ecology and Sociobiology · doi:10.1007/s00265-003-0741-x · Cited by 391 · see citing works
Definitions of territoriality used in the study of variation in vertebrate spacing systems
Maher, C. R., & Lott, D. F. (1995) · Animal Behaviour · doi:10.1016/0003-3472(95)90080-2 · Cited by 375 · see citing works
Unusually extensive networks of vocal recognition in African elephants
McComb, K., Moss, C., Sayialel, S., & Baker, L. (2000) · Animal Behaviour · doi:10.1006/anbe.2000.1406 · Cited by 348 · see citing works
Song matching in the great tit Parus major L.
Krebs, J. R., Ashcroft, R. E., & Orsdol, K. G. V. (1981) · Animal Behaviour · doi:10.1016/s0003-3472(81)80029-2 · Cited by 306 · see citing works
On the Move. How and Why Animals Travel in Groups
Robinson, J. G. (2000) · Animal Behaviour · doi:10.1006/anbe.2000.1497 · Cited by 280 · see citing works
Duet‐splitting and the evolution of gibbon songs
Geissmann, T. (2002) · Biological reviews/Biological reviews of the Cambridge Philosophical Society · doi:10.1017/s1464793101005826 · Cited by 262 · see citing works
Song-type matching between neighbouring song sparrows
Beecher, M. D., Campbell, S. E., Burt, J. M., Hill, C. E., & Nordby, J. C. (2000) · Animal Behaviour · doi:10.1006/anbe.1999.1276 · Cited by 210 · see citing works
Is song–type matching a conventional signal of aggressive intentions?
Vehrencamp, S. L. (2001) · Proceedings of the Royal Society B Biological Sciences · doi:10.1098/rspb.2001.1714 · Cited by 210 · see citing works
Levin, R. N. (1996) · Animal Behaviour · doi:10.1006/anbe.1996.0257 · Cited by 209 · see citing works
Kitchen, D. M. (2004) · Animal Behaviour · doi:10.1016/j.anbehav.2003.03.007 · Cited by 194 · see citing works
An Analysis of the Organization of Vocal Communication in the Titi Monkey Callicebus moloch
Robinson, J. G. (2010) · Zeitschrift für Tierpsychologie · doi:10.1111/j.1439-0310.1979.tb00300.x · Cited by 169 · see citing works
van Roosmalen, M. G. M., Roosmalen, T. V., & Mittermeier, R. A. (2002) · Neotropical Primates · doi:10.62015/np.2002.v10.503 · Cited by 166 · see citing works
Robinson, J. G. (1981) · Primates · doi:10.1007/bf02382607 · Cited by 156 · see citing works
Cowlishaw, G. (1992) · Behaviour · doi:10.1163/156853992x00471 · Cited by 152 · see citing works
Wich, S. A., & Nunn, C. L. (2002) · Behavioral Ecology and Sociobiology · doi:10.1007/s00265-002-0541-8 · Cited by 141 · see citing works
Roars of black howler monkeys (Alouatta caraya): evidence for a function in inter-group spacing
Byrne, R. W., & da Cunha, R. G. T. (2006) · Behaviour · doi:10.1163/156853906778691568 · Cited by 141 · see citing works
Tree Phenology in a Tropical Montane Forest in Rwanda
Sun, C., Kaplin, B. A., Kristensen, K. A., Munyaligoga, V., Mvukiyumwami, J., Kajondo, K. K., & Moermond, T. C. (1996) · Biotropica · doi:10.2307/2389053 · Cited by 137 · see citing works
Extra-pair copulations in a monogamous ape
Palombit, R. A. (1994) · Animal Behaviour · doi:10.1006/anbe.1994.1097 · Cited by 136 · see citing works
Dynamic Pair Bonds in Hylobatids: Implications Regarding Monogamous Social Systems
Palombit, R. A. (1994) · Behaviour · doi:10.1163/156853994x00055 · Cited by 129 · see citing works
Levin, R. N. (1996) · Animal Behaviour · doi:10.1006/anbe.1996.0258 · Cited by 122 · see citing works
Vocal regulation of use of space by groups of titi monkeys Callicebus moloch
Robinson, J. G. (1979) · Behavioral Ecology and Sociobiology · doi:10.1007/bf00302691 · Cited by 116 · see citing works
Convergence in the duetting of monogamous Old World primates
Haimoff, E. H. (1986) · Journal of Human Evolution · doi:10.1016/s0047-2484(86)80065-3 · Cited by 109 · see citing works
Reichard, U. H., & Sommer, V. (1997) · Behaviour · doi:10.1163/156853997x00106 · Cited by 106 · see citing works
Kinzey, W. G., Rosenberger, A. L., Heisler, P. S., Prowse, D. L., & Trilling, J. S. (1977) · Primates · doi:10.1007/bf02382957 · Cited by 100 · see citing works
Norcross, J. L., & Newman, J. D. (1999) · American Journal of Primatology · doi:10.1002/(sici)1098-2345(1999)47:3 · Cited by 97 · see citing works
Communication in the Titi monkey, Callicebus
Moynihan, M. (1966) · Journal of Zoology · doi:10.1111/j.1469-7998.1966.tb02999.x · Cited by 96 · see citing works
Grafe, T. U., & Bitz, J. H. (2004) · Animal Behaviour · doi:10.1016/j.anbehav.2003.11.003 · Cited by 90 · see citing works
The song of the Indris (Indri indri; Primates: Lemuroidea): Natural history, form, and function
Pollock, J. I. (1986) · International Journal of Primatology · doi:10.1007/bf02736391 · Cited by 89 · see citing works
Defler, T. R., Nash, S. D., Mendoza, C. L., Díaz, M. N., Rodríguez-Mahecha, J. V., Rylands, A. B., & Mittermeier, R. A. (2004) · Cited by 83 · see citing works
The alarm call system of wild black-fronted titi monkeys, Callicebus nigrifrons
Cäsar, C., Byrne, R. W., Young, R. J., & Zuberbühler, K. (2012) · Behavioral Ecology and Sociobiology · doi:10.1007/s00265-011-1313-0 · Cited by 81 · see citing works
Duetting in the Titi Monkey Callicebus cupreus: Structure, Pair Specificity and Development of Duets
Müller, A. E., & Anzenberger, G. (2002) · Folia Primatologica · doi:10.1159/000064788 · Cited by 77 · see citing works
Phenology of Flowering and Fruiting of an East African Riverine Forest Ecosystem
Kinnaird, M. F. (1992) · Biotropica · doi:10.2307/2388672 · Cited by 71 · see citing works
de Luna, A. G., Sanmiguel, R., Fiore, A. D., & Fernández‐Duque, E. (2010) · Folia Primatologica · doi:10.1159/000314948 · Cited by 61 · see citing works
Activity pattern of the masked titi monkey,Callicebus personatus
Kinzey, W. G., & Becker, M. (1983) · Primates · doi:10.1007/bf02381979 · Cited by 58 · see citing works
Long-distance calls in Neotropical primates
de Oliveira, D. A. G., & Ades, C. (2004) · Anais da Academia Brasileira de Ciências · doi:10.1590/s0001-37652004000200031 · Cited by 55 · see citing works
Sex Differences in the Song of Indri indri
Giacoma, C., Sorrentino, V., Rabarivola, C., & Gamba, M. (2010) · International Journal of Primatology · doi:10.1007/s10764-010-9412-8 · Cited by 52 · see citing works
Duet Vocalizations among Different Populations of Sulawesi Tarsiers
Nietsch, A. (1999) · International Journal of Primatology · doi:10.1023/a:1020342807709 · Cited by 50 · see citing works
Intergroup loud calls, range size, and spacing in Callicebus torquatus
Kinzey, W. G., & Robinson, J. G. (1983) · American Journal of Physical Anthropology · doi:10.1002/ajpa.1330600416 · Cited by 49 · see citing works
Caselli, C. B., & Setz, E. Z. F. (2011) · Primates · doi:10.1007/s10329-011-0266-2 · Cited by 49 · see citing works
Self-citationPrice, E. C., & Piedade, H. M. (2001) · American Journal of Primatology · doi:10.1002/1098-2345(200102)53:2 · Cited by 34 · see citing works
Vocal communication networks in large terrestrial mammals
McComb, K., & Reby, D. (2005) · Cambridge University Press eBooks · doi:10.1017/cbo9780511610363.021 · Cited by 24 · see citing works
KEY ISSUES IN THE STUDY OF PRIMATE ACOUSTIC SIGNALS.
Gamba, M., & Giacoma, C. (2005) · Institutional Research Information System University of Turin (University of Turin) · Cited by 22 · see citing works
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- Authors
- Caselli, C. B., Mennill, D. J., Bicca‐Marques, J. C., & Setz, E. Z. F.
- Affiliations
- Universidade Estadual de Campinas (UNICAMP) (BR)
- University of Windsor (CA)
- Pontifícia Universidade Católica do Rio Grande do Sul (BR)
- Corresponding author
- Caselli, Christini B.
- Venue
- American Journal of Primatology
- Publisher
- Wiley
- Published
- 2014-03-03
- Volume
- 76
- Issue
- 8
- Pages
- 788-800
- ISSN
- 0275-2565 (ISSN-L)
- 1098-2345
- OpenAlex
- W1480765130
- Cited by
- 51
- References
- 49
- Citations by year
- 2026: 2 · 2025: 2 · 2024: 2 · 2023: 7 · 2022: 5 · 2021: 6 · 2020: 6 · 2019: 4 · 2018: 5 · 2017: 5 · 2016: 4 · 2015: 1 · 2014: 1
- FWCI
- 3.35
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- American Journal of Primatology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Idea Wild
- Government of Ontario
- Fundação de Amparo à Pesquisa do Estado de São Paulo
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Developmental Biology › Animal Vocal Communication and Behavior
- Social Sciences › Psychology › Social Psychology › Primate Behavior and Ecology
- Physical Sciences › Environmental Science › Ecology › Marine animal studies overview
- Keywords
- Callicebus nigrifrons, loud calls, primate vocalizations, acoustic features, territorial defense, resource defense, mated pairs, bioacoustics
- MeSH terms
- Animals, Animal Communication, Behavior, Animal, Female, Male, Sexual Behavior, Animal, Vocalization, Animal, Pitheciidae
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