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Campbell's Monkeys Use Affixation to Alter Call Meaning
It is concluded that, when referring to specific external events, non-human primates can generate meaningful acoustic variation during call production that is functionally equivalent to suffixation in human language.
Campbell's monkeys concatenate vocalizations into context-specific call sequences
- Karim Ouattara, A. Lemasson, K. Zuberbühler
- BiologyProceedings of the National Academy of Sciences
- 22 December 2009
The results of a long-term study on Campbell's monkeys are presented, which reveals an unrivaled degree of vocal complexity and may be the most complex example of ‘proto-syntax’ in animal communication known to date.
The alarm call system of female Campbell's monkeys
Horse (Equus caballus) whinnies: a source of social information
- A. Lemasson, A. Boutin, Sarah Boivin, C. Blois-Heulin, M. Hausberger
- PsychologyAnimal Cognition
- 18 May 2009
The potential existence of individual acoustic signatures in whinny calls and the ability of horses to discriminate by ear individuals varying in their degree of familiarity are investigated and a process of vocal coding/decoding of information is suggested.
Visual laterality in dolphins: importance of the familiarity of stimuli
- C. Blois-Heulin, Mélodie Crével, M. Böye, A. Lemasson
- Biology, PsychologyBMC Neuroscience
- 12 January 2012
The results suggest different visual cerebral processes based either on the global shape of well-known objects or on local details of unknown objects, which might be crucial for their wild life given their fission-fusion social system and migratory behaviour.
Social complexity parallels vocal complexity: a comparison of three non-human primate species
Providing evidence of higher levels of vocal variability in species presenting a more complex social system, the results are in line with the theory of a social-vocal coevolution of communicative abilities, opening new perspectives for comparative research on the evolution of communication systems in different animal taxa.
Monkey semantics: two ‘dialects’ of Campbell’s monkey alarm calls
A formal semantic analysis of the alarm calls used by Campbell’s monkeys in the Tai forest and on Tiwai island—two sites that differ in the main predators that the monkeys are exposed to— develops models based on a compositional semantics in which concatenation is interpreted as conjunction, roots have lexical meanings, and an all-purpose alarm parameter is raised with each individual call.
Acoustic variability and social significance of calls in female Campbell's monkeys (Cercopithecus campbelli campbelli).
- A. Lemasson, M. Hausberger
- Psychology, BiologyJournal of the Acoustical Society of America
- 10 May 2011
This is the first detailed description of female Campbell's monkeys' vocal repertoire emphasizing a possible relationship between social function and flexibility level, and the vocal repertoire displayed an "arborescent" organization (call type, subtype, and variants).
Acoustic variability and individual distinctiveness in the vocal repertoire of red-capped mangabeys (Cercocebus torquatus).
- Hélène Bouchet, C. Blois-Heulin, Anne-Sophie Pellier, K. Zuberbühler, A. Lemasson
- PhysicsJournal of Comparative Psychology
- 1 February 2012
Call mediating intragroup social interactions were structurally most variable and individually most distinctive, highlighting the key role that social factors must have played in the evolution of the vocal repertoire in this species.
Youngsters do not pay attention to conversational rules: is this so for nonhuman primates?
These observations of Campbell's monkeys' spontaneous vocal utterances revealed that juveniles broke the turn-taking rule more often than did experienced adults, and parallels between human conversations and nonhuman primate vocal exchanges are strengthened.