Spectral sensitivities of photoreceptors and their role in colour discrimination in the green-backed firecrown hummingbird (<i>Sephanoides sephaniodes</i>)

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dc.contributor.authorHerrera, Gonzalo
dc.contributor.authorZagal, Juan Cristobal
dc.contributor.authorDiaz, Marcelo
dc.contributor.authorFernandez, Maria Jose
dc.contributor.authorVielma, Alex
dc.contributor.authorCure, Michel
dc.contributor.authorMartinez, Jaime
dc.contributor.authorBozinovic, Francisco
dc.contributor.authorPalacios, Adrian G.
dc.date.accessioned2025-01-21T01:05:00Z
dc.date.available2025-01-21T01:05:00Z
dc.date.issued2008
dc.description.abstractWe studied the photopic spectral sensitivity in the green-backed firecrown, Sephanoides sephaniodes, a South American hummingbird, and its possible ecological relationship with preferred flowers and body colouration. Avian colour vision is in general tetrachromatic with at least four types of cones, which vary in sensitivity from the near ultraviolet (UV) to the red wavelength range. Hummingbirds represent an important family of birds, yet little is known about their eye sensitivity, especially about the role of photoreceptors and their oil droplet complements. The photopic electroretinogram shows a main sensitivity peak at 560 nm and a secondary peak in the UV, and may be explained by the presence of four single cones (lambda(max) at similar to 370, 440, 508 and 560 nm), and a double cone (lambda(max) at 560 nm) screened by oil droplets. The flowers preferred by the firecrown are those in which the red-green wavelength region predominates and have higher contrast than other flowers. The crown plumage of males is highly iridescent in the red wavelength range (peak at 650 nm) and UV; when plotted in a high-dimensional tetrachromatic space, it falls in a "red + UV" purple hue line, suggesting a potential significant communication signal for sexual differentiation.
dc.fuente.origenWOS
dc.identifier.doi10.1007/s00359-008-0349-8
dc.identifier.eissn1432-1351
dc.identifier.issn0340-7594
dc.identifier.urihttps://doi.org/10.1007/s00359-008-0349-8
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95777
dc.identifier.wosidWOS:000258656000001
dc.issue.numero9
dc.language.isoen
dc.pagina.final794
dc.pagina.inicio785
dc.revistaJournal of comparative physiology a-neuroethology sensory neural and behavioral physiology
dc.rightsacceso restringido
dc.subjecttetrachromatic vision
dc.subjecthummingbird
dc.subjectneotropical bird
dc.subjectelectroretinogram
dc.subjectspectral reflectance
dc.subject.ods15 Life on Land
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titleSpectral sensitivities of photoreceptors and their role in colour discrimination in the green-backed firecrown hummingbird (<i>Sephanoides sephaniodes</i>)
dc.typeartículo
dc.volumen194
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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