Vocal behavior of black-fronted titi monkeys (Callicebus nigrifrons): Acoustic properties and behavioral contexts of loud calls

2014 ◽  
Vol 76 (8) ◽  
pp. 788-800 ◽  
Author(s):  
Christini B. Caselli ◽  
Daniel J. Mennill ◽  
Júlio César Bicca-Marques ◽  
Eleonore Z. F. Setz
Keyword(s):  
Acoustic Properties ◽  
Vocal Behavior ◽  
Loud Calls ◽  
Titi Monkeys ◽  
Callicebus Nigrifrons

scholarly journals Duetting Patterns of Titi Monkeys (Primates, Pitheciidae: Callicebinae) and Relationships with Phylogeny

Animals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 178 ◽  
Author(s):  
Patrice Adret ◽  
Kimberly Dingess ◽  
Christini Caselli ◽  
Jan Vermeer ◽  
Jesus Martínez ◽  
...  
Keyword(s):  
Vocal Communication ◽  
Power Spectral Analysis ◽  
Dominant Frequency ◽  
Sensu Stricto ◽  
Potential Contribution ◽  
Linear Discriminant ◽  
Loud Calls ◽  
Titi Monkeys ◽  
Socially Monogamous ◽  
Habitat Acoustics

Long-range vocal communication in socially monogamous titi monkeys is mediated by the production of loud, advertising calls in the form of solos, duets, and choruses. We conducted a power spectral analysis of duets and choruses (simply “duets” hereafter) followed by linear discriminant analysis using three acoustic parameters—dominant frequency of the combined signal, duet sequence duration, and pant call rate—comparing the coordinated vocalizations recorded from 36 family groups at 18 sites in Bolivia, Peru and Ecuador. Our analysis identified four distinct duetting patterns: (1) a donacophilus pattern, sensu stricto, characteristic of P. donacophilus, P. pallescens, P. olallae, and P. modestus; (2) a moloch pattern comprising P. discolor, P. toppini, P. aureipalatii, and P. urubambensis; (3) a torquatus pattern exemplified by the duet of Cheracebus lucifer; and (4) the distinctive duet of P. oenanthe, a putative member of the donacophilus group, which is characterized by a mix of broadband and narrowband syllables, many of which are unique to this species. We also document a sex-related difference in the bellow-pant phrase combination among the three taxa sampled from the moloch lineage. Our data reveal a presumptive taxonomic incoherence illustrated by the distinctive loud calls of both P. urubambensis and P. oenanthe within the donacophilus lineage, sensu largo. The results are discussed in light of recent reassessments of the callicebine phylogeny, based on a suite of genetic studies, and the potential contribution of environmental influences, including habitat acoustics and social learning. A better knowledge of callicebine loud calls may also impact the conservation of critically endangered populations, such as the vocally distinctive Peruvian endemic, the San Martin titi, P. oenanthe.

Chromosome Painting in Callicebus nigrifrons Provides Insights into the Genome Evolution of Titi Monkeys and the Ancestral Callicebinae Karyotype

2017 ◽  
Vol 151 (2) ◽  
pp. 82-88 ◽  
Author(s):  
Naiara Pereira Araújo ◽  
Alice Alves do Espírito Santo ◽  
Valéria do Socorro Pereira ◽  
Roscoe Stanyon ◽  
Marta Svartman
Keyword(s):  
Human Chromosome ◽  
Chromosome Painting ◽  
Human Chromosomes ◽  
Molecular Cytogenetic ◽  
Monkey Species ◽  
Titi Monkey ◽  
Painting Analysis ◽  
Titi Monkeys ◽  
Callicebus Nigrifrons ◽  
Cytogenetic Methods

We studied the chromosomes of Callicebus nigrifrons with conventional and molecular cytogenetic methods. Our chromosome painting analysis in C. nigrifrons together with previous reports allowed us to hypothesize an ancestral Callicebinae karyotype with 2n = 48. The associations of human chromosomes (HSA) 2/22, 7/15, 10/11, and the inverted HSA2/16 would link Callicebus, Cheracebus, and Plecturocebus and would thus be present in the ancestral Callicebinae karyotype. Four fusions (HSA1b/1c, 3c/8b, 13/20, and 14/15/3/21) and 1 fission (HSA2/22) are synapomorphies of Callicebus. The associations HSA3/15 and HSA3/9 are chromosome features linking Callicebus and Cheracebus, whereas the association HSA13/17 would represent a link between Callicebus and the moloch group (Plecturocebus). Only 6 of the 33 recognized titi monkey species have now been painted with human chromosome-specific probes. Further analyses are needed to clarify the phylogenomic relationships in this species-rich group.

scholarly journals Re-emergence of the leaf clip gesture during an alpha takeover affects variation in male chimpanzee loud calls

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5079 ◽  
Author(s):  
Ammie K. Kalan ◽  
Christophe Boesch
Keyword(s):  
Dominance Rank ◽  
Social Rank ◽  
Male Dominance ◽  
Acoustic Properties ◽  
Long Distance ◽  
Loud Calls ◽  
Fundamental Frequencies ◽  
Leaf Clipping ◽  
Pant Hoot ◽  
Population Comparisons

Loud calls are used by many species as long-distance signals for group defense, mate attraction, and inter- and intragroup spacing. Chimpanzee loud calls, or pant hoots, are used in a variety of contexts including group coordination and during male contests. Here, we observed an alpha male takeover in wild chimpanzees (Pan troglodytes verus) during which the leaf clipping gesture re-emerged after disappearing for almost two years in this community. Leaf clipping only occurred in males and was observed almost exclusively prior to pant hoot vocalizations, as has been observed in other chimpanzee communities of the Taï forest in Côte d’Ivoire. Consequently, we hypothesized that leaf clipping may be important for male-male competition by affecting variation in the acoustic properties of male chimpanzee loud calls. We therefore investigated whether pant hoots preceded by leaf clipping differed acoustically from those without, while also testing the influence of social context on pant hoot variation, namely male dominance rank and hierarchy instability, i.e., before, during and after the alpha takeover. We found that pant hoots preceded by leaf clipping were longer, contained more call elements and drum beats, and lower fundamental and peak frequencies. Moreover, during the alpha takeover pant hoots were shorter, contained fewer drum beats and higher fundamental frequencies. Additionally, pant hoot and aggression rates were also highest during the alpha takeover with leaf clipping more likely to occur on days when pant hooting rates were high. Overall social rank had limited effects on pant hoot variation. We suggest that elevated arousal and aggression during the alpha takeover triggered the re-emergence of leaf clipping and the associated acoustic changes in pant hoots. Further research should focus on the potential mechanisms by which leaf clipping is connected to variation in pant hoots and cross-population comparisons of the behaviour.

scholarly journals Titi monkeys combine alarm calls to create probabilistic meaning

2019 ◽  
Vol 5 (5) ◽  
pp. eaav3991 ◽  
Author(s):  
Mélissa Berthet ◽  
Geoffrey Mesbahi ◽  
Aude Pajot ◽  
Cristiane Cäsar ◽  
Christof Neumann ◽  
...  
Keyword(s):  
Animal Communication ◽  
Language Evolution ◽  
Alarm Call ◽  
Alarm Calls ◽  
Playback Experiments ◽  
Multimodel Inference ◽  
Titi Monkeys ◽  
Callicebus Nigrifrons ◽  
Available Information ◽  
Free Ranging

Previous work suggested that titi monkeys Callicebus nigrifrons combine two alarm calls, the A- and B-calls, to communicate about predator type and location. To explore how listeners process these sequences, we recorded alarm call sequences of six free-ranging groups exposed to terrestrial and aerial predator models, placed on the ground or in the canopy, and used multimodel inference to assess the information encoded in the sequences. We then carried out playback experiments to identify the features used by listeners to react to the available information. Results indicated that information about predator type and location were encoded by the proportion of B-call pairs relative to all call pairs of the sequence (i.e., proportion of BB-grams). The results suggest that the meaning of the sequence is not conveyed in a categorical but probabilistic manner. We discuss the implications of these findings for current theories of animal communication and language evolution.

Unraveling the scales of effect of landscape structure on primate species richness and density of titi monkeys ( Callicebus nigrifrons )

2018 ◽  
Vol 34 (1) ◽  
pp. 150-159 ◽  
Author(s):  
Carla C. Gestich ◽  
Víctor Arroyo‐Rodríguez ◽  
Milton C. Ribeiro ◽  
Rogério G. T. da Cunha ◽  
Eleonore Z. F. Setz
Keyword(s):  
Species Richness ◽  
Landscape Structure ◽  
Primate Species ◽  
Titi Monkeys ◽  
Callicebus Nigrifrons

scholarly journals Do wild titi monkeys show empathy?

2014 ◽  
Vol 1 (1) ◽  
pp. 23-28 ◽  
Author(s):  
A. Clyvia ◽  
M. C. Kaizer ◽  
R. V. Santos ◽  
R. J. Young ◽  
C. Cäsar
Keyword(s):  
Predation Risk ◽  
Hind Limb ◽  
Motor Coordination ◽  
Agonistic Behaviour ◽  
Visual Contact ◽  
Titi Monkeys ◽  
Low Levels ◽  
Callicebus Nigrifrons ◽  
The Individual ◽  
Group D

Abstract. We observed a putative case of empathy among wild black-fronted titi monkeys (Callicebus nigrifrons) from two different groups (D and R). In over 10 years of behavioural observations of five habituated groups of this species, only low levels of inter-group tolerance have been observed. However, on one day, we encountered the adult male from group D limping (poor hind limb motor coordination) as he travelled alone along the ground. Interestingly, we observed that members of group R did not express any agonistic behaviour towards this neighbouring male and apparently allowed this disabled individual to follow them in the forest for over 5 h. They stayed low in the forest (< 2 m above the ground) and < 10 m horizontally from the individual, and remained in visual contact with him. At the end of the day, this male from group D slept in the sleeping site of group R and was groomed by the adult female of group R. Such tolerance between members of different groups has never been previously observed in this species. Furthermore, group R exposed themselves to increased predation risk by staying close to the ground for protracted periods. The behaviour of group R could be interpreted by as a putative case of empathic responding in this species.

The diet of wild black-fronted titi monkeys Callicebus nigrifrons during a bamboo masting year

Primates ◽  
2012 ◽  
Vol 53 (3) ◽  
pp. 265-272 ◽  
Author(s):  
Glênio Pereira dos Santos ◽  
Cristiane Galvão ◽  
Robert J. Young
Keyword(s):  
Titi Monkeys ◽  
Callicebus Nigrifrons

scholarly journals The alarm call system of wild black-fronted titi monkeys, Callicebus nigrifrons

2012 ◽  
Vol 66 (5) ◽  
pp. 653-667 ◽  
Author(s):  
Cristiane Cäsar ◽  
Richard Byrne ◽  
Robert J. Young ◽  
Klaus Zuberbühler
Keyword(s):  
Alarm Call ◽  
Call System ◽  
Titi Monkeys ◽  
Callicebus Nigrifrons

Observed case of maternal infanticide in a wild group of black-fronted titi monkeys (Callicebus nigrifrons)

Primates ◽  
2007 ◽  
Vol 49 (2) ◽  
pp. 143-145 ◽  
Author(s):  
Cristiane Cäsar ◽  
Eduardo Silva Franco ◽  
Gabriela de Castro Nogueira Soares ◽  
Robert John Young
Keyword(s):  
Titi Monkeys ◽  
Callicebus Nigrifrons ◽  
Wild Group
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