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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
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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 red–green (RG) and yellow–blue (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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