Morphological and Ecological Characters in Sympatric Populations of Macaca in the Dawna Range

Eudey, Ardith A.

doi:10.1007/978-3-642-68251-3_5

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…Differentiation into an even shorter tailed (200 mm) M. a. assamensis could have occurred here after the isolation caused by a glacial advance in the Brahmaputra gap. Increased seasonality and deforestation after the last glacial may have led populations of M. assamensis to concentrate in forest refuges in the foothills of eastern Himalaya, the Dawna range and Annamitic cordillera (Eudey, 1979(Eudey, ,1981 from where they may have dispersed with improved climatic conditions. This species could only spread southward, because the Hengduan Shan mountains blocked any movement to the north and east.…”

Section: Sinicagroupmentioning

confidence: 99%

The genus Macaca: a review of taxonomy and evolution

1989

Mammal Review

114

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This paper is a compilation of information on the taxonomy and evolution of the genus Macaca. The various classifications of the macaques since 1916 are provided. Descriptions of all known extant species and general characteristics of each species group are reviewed, and hybridization between the different species discussed. Details are given of the geographic distribution of all species, including the habitats utilized. The available information on the fossil record is collated and this is followed by a discussion of the current interpretations of distributions, in relation to evolution and dispersal of the genus. The paper ends with a synopsis and conclusions which point out areas where further research is needed.

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Section: Sinicagroupmentioning

confidence: 99%

The genus Macaca: a review of taxonomy and evolution

1989

Mammal Review

114

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“…To investigate the social modulation of yawning, we selected M. fuscata (Japanese macaques) and M. tonkeana (Tonkean macaques), two closely related species (Delson, 1980; Eudey, 1981; Hoelzer & Melnick, 1996) with comparable levels of sexual dimorphism. Both species present two variant displays of yawning: covered teeth (teeth remain covered also in the correspondence of the acme phase) and uncovered gums (teeth and gums exposed along with the duration of the acme phase).…”

mentioning

confidence: 99%

Yawning and social styles: Different functions in tolerant and despotic macaques (Macaca tonkeana and Macaca fuscata).

Zannella

Stanyon

Palagi

2017

Journal of Comparative Psychology

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Yawning is a multifunctional behavior with a role in social communication. In Old World monkeys, the "tension yawn" is often used as a threat, allowing individuals to completely expose their canines. To explore the role of this phenomenon, we selected 2 closely related species-Japanese macaques (Macaca fuscata) and Tonkean macaques (M. tonkeana)-which differ primarily in terms of their tolerance levels. Japanese macaques are classified as despotic; Tonkean macaques are classified as tolerant. Both species live in multimale-multifemale societies, show a high level of sexual dimorphism, and have comparable yawning repertoires that include displaying a covered teeth yawn and an uncovered gums yawn. We found comparable baseline frequencies of the 2 yawning types and a similar distribution of these behaviors according to sex (males yawned more frequently than females). This morphological homogeneity permitted us to evaluate potential differences in the meaning of yawning as a function of social tension, aggressive contexts, and dominance hierarchy. Divergent social styles determine a functional dichotomy in the use of the covered teeth yawn and the uncovered gums yawn. The covered teeth yawn is not susceptible to social and environmental stimuli and seems to be a form of yawning mostly linked to the physiology of the sleep-wake cycle. However, the uncovered gums yawn is modulated according to different social contexts, and its use could be favored by natural selection, especially in tolerant species, which apparently require more elaborate forms of social communication. (PsycINFO Database Record

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