Behavioural evidence of sex-linked colour vision polymorphism in the squirrel monkey Saimiri ustus

Folia primatologica; international journal of primatology
Carolina C PradoV F Pessoa

Abstract

Squirrel monkeys, like most Neotropical primates, display a sex-linked colour vision polymorphism. Here we assess the colour perception of 8 Saimiri ustus by a behavioural paradigm using Munsell colour chips as discriminating stimuli. A random variation in brightness assured that discriminations were based on colour rather than brightness cues. Results indicate that all males showed random performances when presented with stimuli which, in previous experiments with human colour-blind individuals and dichromatic non-human primates, proved to be difficult to discriminate. Females behaved as trichromats. The different phenotypes in S. ustus may offer diverse advantages in feeding ecology and are in agreement with the existence of vision polymorphism, as described for other species of squirrel monkeys.

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Citations

Jul 5, 2008·Visual Neuroscience·Antônio C AraújoValdir F Pessoa
Mar 20, 2009·Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology·Eduardo Sosti PeriniDaniel Marques de Almeida Pessoa
Feb 22, 2014·Journal of Toxicology and Environmental Health. Part a·Lílian Cristina PereiraDaniel Junqueira Dorta
Sep 17, 2014·American Journal of Primatology·Eldianne Moreira de LimaValdir Filgueiras Pessoa
Jun 1, 2010·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Chun-Yao ChenYang-Hsin Shih
Mar 11, 2011·Journal of Toxicology and Environmental Health. Part a·Vidar BergErik Ropstad

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