... to determine the color-vision capabilities of a rock-dwelling cichlid from Lake Malawi and suggest that cichlids possess a trichromatic visual system. Fish vision Color opponency Trichromacy Classical conditioning Animals vary greatly in color pattern, with coloration often playing...

... tasks: (1) detecting food-rich `target' flowers against their natural background of foliage or other vegetation; (2)discriminating target flowers from flowers of non-target species; (3)discerning the maturity of the most important target flowers. Initial comparisons of trichromacy vs dichromacy...

..., J. ( 2002 ). Trichromacy in Australian Marsupials. Curr. Biol. 12 , 657 -660. Caine, N. G. and Mundy, N. I. ( 2000 ). Demonstration of a foraging advantage for trichromatic marmosets( Callithrix geoffroyi ) dependent on food color. Proc. R. Soc. Lond. B 267 , 439 -444. Coss, R. G...

... that the spectral positions of the primate long-(L) and middle-wavelength (M) cone pigments are not optimised for this task. * e-mail: [email protected] 16 4 2000 13 6 2000 © 2000 by Company of Biologists 2000 colour vision trichromacy opsin visual ecology Old World primate...

... in their spectral positions. We ask whether the selective advantage of trichromacy lies in an enhanced ability to find edible leaves or fruit. Further, we ask whether any factor in these two search tasks has constrained the particular set of cone spectral sensitivities observed in all catarrhines. We measured...