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- W2178017866 abstract "The Picui Dove (Columbina picui) has been considered sexually monochromatic, with females slightly duller than males. This assessment has been based on colors perceived by the human eye. However, birds possess an additional, near-ultraviolet photoreceptor and thus are sensitive to wavelengths humans are not. Measurements of reflectance using spectroradiometry permit an objective determination of the coloration of the birds' plumage and of color differences between the sexes. We here show that the plumage coloration of the Picui Dove is clearly sexually dimorphic. Males were overall brighter than females, and several body regions showed a significant sex difference in spectral shape. These results imply that studies of sexual selection in this and related species should measure sexual dichromatism objectively, and should not rely on human color perception. Determinación Objetiva del Dicromatismo Sexual del Plumaje en Columbina picui Resumen. La especie Columbina picui ha sido considerada sexualmente monocromática, siendo las hembras levemente más opacas que los machos. Esta conclusión ha sido basada en la percepción humana del color. Sin embargo, las aves poseen un fotorreceptor adicional en el ultravioleta cercano y son, por lo tanto, sensibles a longitudes de onda que los humanos no perciben. La medición de la reflectancia por medio de la técnica de espectrofotometría permite una determinación objetiva del color del plumaje y de las diferencias de color entre los sexos. En este estudio mostramos que C. picui es claramente sexualmente dicromática, siendo los machos más brillantes que las hembras y presentando en algunas regiones del cuerpo diferencias en el espectro de las longitudes de onda reflejadas. Estos resultados demuestran que la determinación de dicromatismo sexual no debería basarse en la percepción humana y tiene, además, implicancias para los estudios de selección sexual en esta especie y especies relacionadas." @default.
- W2178017866 created "2016-06-24" @default.
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- W2178017866 date "2002-01-01" @default.
- W2178017866 modified "2023-09-26" @default.
- W2178017866 title "OBJECTIVE ASSESSMENT OF SEXUAL PLUMAGE DICHROMATISM IN THE PICUI DOVE" @default.
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- W2178017866 doi "https://doi.org/10.1650/0010-5422(2002)104[0248:oaospd]2.0.co;2" @default.
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