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Author Curtis, A.M.; FitzGerald, G.A.
Title (up) Central and peripheral clocks in cardiovascular and metabolic function Type Journal Article
Year 2006 Publication Annals of Medicine Abbreviated Journal Ann Med
Volume 38 Issue 8 Pages 552-559
Keywords Human Health
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Series Volume Series Issue Edition
ISSN 0785-3890 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number LoNNe @ kagoburian @ Serial 730
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Author Johnsen, S.; Kelber, A.; Warrant, E.; Sweeney, A.M.; Widder, E.A.; Lee, R.L.J.; Hernandez-Andres, J.
Title (up) Crepuscular and nocturnal illumination and its effects on color perception by the nocturnal hawkmoth Deilephila elpenor Type Journal Article
Year 2006 Publication The Journal of Experimental Biology Abbreviated Journal J Exp Biol
Volume 209 Issue Pt 5 Pages 789-800
Keywords Animals; Color Perception/*physiology; Ecosystem; *Light; Moths/*physiology
Abstract Recent studies have shown that certain nocturnal insect and vertebrate species have true color vision under nocturnal illumination. Thus, their vision is potentially affected by changes in the spectral quality of twilight and nocturnal illumination, due to the presence or absence of the moon, artificial light pollution and other factors. We investigated this in the following manner. First we measured the spectral irradiance (from 300 to 700 nm) during the day, sunset, twilight, full moon, new moon, and in the presence of high levels of light pollution. The spectra were then converted to both human-based chromaticities and to relative quantum catches for the nocturnal hawkmoth Deilephila elpenor, which has color vision. The reflectance spectra of various flowers and leaves and the red hindwings of D. elpenor were also converted to chromaticities and relative quantum catches. Finally, the achromatic and chromatic contrasts (with and without von Kries color constancy) of the flowers and hindwings against a leaf background were determined under the various lighting environments. The twilight and nocturnal illuminants were substantially different from each other, resulting in significantly different contrasts. The addition of von Kries color constancy significantly reduced the effect of changing illuminants on chromatic contrast, suggesting that, even in this light-limited environment, the ability of color vision to provide reliable signals under changing illuminants may offset the concurrent threefold decrease in sensitivity and spatial resolution. Given this, color vision may be more common in crepuscular and nocturnal species than previously considered.
Address Biology Department, Duke University, Durham, NC 27708, USA. sjohnsen@duke.edu
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Language English Summary Language Original Title
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Series Volume Series Issue Edition
ISSN 0022-0949 ISBN Medium
Area Expedition Conference
Notes PMID:16481568 Approved no
Call Number LoNNe @ kagoburian @ Serial 604
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Author IDA
Title (up) Dark-Sky Park Program Type Journal Article
Year 2006 Publication edited by International Dark-Sky Association Abbreviated Journal
Volume Issue Pages 11
Keywords Skyglow
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Notes Approved no
Call Number LoNNe @ kagoburian @ Serial 763
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Author Coffin, D.
Title (up) Dave Coffinś DCRAW. Type Journal Article
Year 2006 Publication Abbreviated Journal
Volume Issue Pages
Keywords Remote Sensing
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Notes Approved no
Call Number LoNNe @ kagoburian @ Serial 916
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Author Powe, N.A; Willis, K.G.; Garrod, G.D.
Title (up) Difficulties in Valuing Street Light Improvement: Trust, Surprise and Bound Effects Type Journal Article
Year 2006 Publication Applied Economics Abbreviated Journal
Volume 38 Issue 4 Pages 371–381
Keywords Economics
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Publisher Place of Publication Editor
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Area Expedition Conference
Notes Approved no
Call Number LoNNe @ kagoburian @ Serial 1055
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