| The presence of UV wavelengths improves the temporal resolution of the avian visual system. | |
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MedLine Citation:
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PMID: 20833929 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The ability to perceive rapid movement is an essential adaptation in birds, which are involved in rapid flight, pursuing prey and escaping predators. Nevertheless, the temporal resolution of the avian visual systems has been less well explored than spectral sensitivity. There are indications that birds are superior to humans in their ability to detect movement, as suggested by higher critical flicker frequencies (CFFs). It has also been implied, but not properly tested, that properties of CFF, as a function of light intensity, are affected by the spectral composition of light. This study measured CFF in the chicken, Gallus gallus L., using four different light stimuli - white, full-spectrum (white with addition of UV), yellow (590 nm) and UV (400 nm) - and four light intensity levels, adjusted to relative cone sensitivity. The results showed significantly higher CFF values for full-spectrum compared with white light, as well as a steeper rate of increase with intensity. The presence of UV wavelengths, previously demonstrated to affect mate choice and foraging, appears to be important also for detection of rapid movement. The yellow and UV light stimuli yielded rather similar CFFs, indicating no special role for the double cone in flicker detection. |
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Authors:
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Diana Rubene; Olle Håstad; Ragnar Tauson; Helena Wall; Anders Odeen |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Journal of experimental biology Volume: 213 ISSN: 1477-9145 ISO Abbreviation: J. Exp. Biol. Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-09-13 Completed Date: 2011-01-12 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0243705 Medline TA: J Exp Biol Country: England |
Other Details:
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Languages: eng Pagination: 3357-63 Citation Subset: IM |
Affiliation:
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Department of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, S-752 36 Uppsala, Sweden. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Chickens / physiology* Color Vision / physiology Flicker Fusion / physiology Motion Perception / physiology* Photic Stimulation Ultraviolet Rays Visual Perception / physiology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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