Feeding ecology and activity pattern of black-fronted titi monkeys (Callicebus nigrifrons) in a semideciduous tropical forest of southern Brazil

Primates ◽  
2011 ◽  
Vol 52 (4) ◽  
pp. 351-359 ◽  
Author(s):  
Christini Barbosa Caselli ◽  
Eleonore Zulnara Freire Setz
Keyword(s):  
Tropical Forest ◽  
Feeding Ecology ◽  
Activity Pattern ◽  
Southern Brazil ◽  
Titi Monkeys ◽  
Callicebus Nigrifrons

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.

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 Reproduction and feeding ecology of Amphisbaena munoai and Anops kingi (Amphisbaenia, Amphisbaenidae) in the Escudo Sul-Rio-Grandense, southern Brazil

2011 ◽  
Vol 101 (1-2) ◽  
pp. 93-102 ◽  
Author(s):  
Rafael L Balestrin ◽  
Lize H Cappellari
Keyword(s):  
Feeding Ecology ◽  
Original Data ◽  
Adult Males ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Gut Content ◽  
Insect Larvae ◽  
Males And Females ◽  
Sexually Mature ◽  
Unimodal Pattern

This study presents original data on the reproduction and feeding ecology of two syntopic amphisbaenians, Amphisbaena munoai Klappenbach, 1969 and Anops kingi Bell, 1833, from southern Brazil. Sampling was carried out from April 2004 to April 2006 at a highland area located in São Jerônimo and Barão do Triunfo municipalities, Rio Grande do Sul, Brazil. A total of 647 amphisbaenians were collected, 510 specimens of A. munoai and 137 specimens of A. kingi, of which 130 and 93, respectively, had their gonads and gut content analyzed. Both species presented a unimodal pattern of seasonal distribution, sexually mature females with significantly larger snout vent length (SVL) than sexually mature males, and seasonal reproductive cycle. Adults of A. kingi had significantly larger (SVL) than those of Amphisbaena munoai. Both species had generalist diets, but termites (Isoptera) was a staple item in their diet. Greater predominance of insect larvae was observed in the diet of A. kingi, which may be due to its larger body in comparison to A. munoai. Insect larvae ingested by A. kingi were significantly larger than those ingested by A. munoai. Diets of adult males and females of both species were not significantly different. The ontogenetic diet comparison in both species revealed significant numerical differences, with adults consuming higher numbers of prey.

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.

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