First published online June 7, 2004
Journal of Experimental Biology 207, 2465-2470 (2004)
Published by The Company of Biologists 2004
doi: 10.1242/jeb.01046
Effect of polymorphic colour vision for fruit detection in the spider monkey Ateles geoffroyi, and its implications for the maintenance of polymorphic colour vision in platyrrhine monkeys
Pablo Riba-Hernández1,
Kathryn E. Stoner2,* and
Daniel Osorio3
1 Universidad de Costa Rica, Escuela de Biología, San Pedro, Costa
Rica
2 Centro de Investigaciones en Ecosistemas, Universidad Nacional
Autónoma de México, Apartado Postal 27-3 (Xangari), Morelia,
Michoacan, 48980 Mexico
3 School of Life Sciences, University of Sussex, Brighton BN1 9QG,
UK

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Fig. 1. Distribution of fruit chromaticities from the diet of Ateles
geoffroyi for redgreen (RG) and yellowblue
(YB) colour vision signals, as defined in the text. Values are
calculated for cone sensitivities of the standard catarrhine type of
trichromatic colour vision with 535 and 562 nm pigments. Green circles
represent the background (i.e. mature leaves), red circles represent fruits
consumed by spider monkeys (N=39 species, representing more than
77.5% of feeding time in fruits). Red circles with pink dots represent the
fruit species also eaten by males. The five most important species in the diet
of A. geoffroyi are marked with squares and have the species names
beside them. Whiskers represent standard errors of fruit chromaticities.
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© The Company of Biologists Ltd 2004