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Author Perkowitz, S.
Title Empire of light: a history of discovery in science and art Type Journal Article
Year (up) 1996 Publication Washington, DC: Joseph Henry Press. Abbreviated Journal
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Keywords Society
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Call Number LoNNe @ kagoburian @ Serial 1053
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Author Middleton, B.; Arendt, J.; Stone, BM
Title Human circadian rhythms in constant dim light (8 lux) with knowledge of clock time Type Journal Article
Year (up) 1996 Publication Journal of Sleep Research Abbreviated Journal J. Sleep Res.
Volume 5 Issue 2 Pages 69-76
Keywords Human Health; circadian rhythm; light/dark cycle; melatonin; entrainment; melatonin levels; 6-sulphatoxymelatonin
Abstract The light/dark (L/D) cycle is a major synchronizer of human circadian rhythms. In the absence of a strong L/D cycle, synchrony with 24 hours can nevertheless be maintained in a socially structured environment, as shown in Polar regions (Broadway et al. 1987) and by some blind subjects (Czeisler et al. 1995a). The relative contribution of other time cues to entrainment in dim light has not been fully explored. The present study investigated the behaviour of melatonin (assessed as 6-sulphatoxymelatonin); rectal temperature; activity and sleep (actigraphy and logs) in constant dim light (L/ L) with access to a digital clock. 6 normal healthy males were maintained as a group in partial temporal isolation with attenuated sound and ambient temperature for 21 days. All 6 subjects showed free-running periodicity for 6-sulphatoxymelatonin and 5/6 subjects for temperature, activity and sleep offset. The average period (tau) was 24.26 +/- 0.049, substantially shorter than in previous experiments with a self selected L/D cycle but similar to a recent study conducted in very dim light. One subject maintained a rigid sleep/wake cycle throughout whilst his 6-sulphatoxymelatonin rhythm free-ran. Total sleep time, from actigraph data, did not change but sleep efficiency decreased during the experiment. The subjects did not show group synchronization. These results confirm previous data indicating the importance of the L/D cycle in human entrainment and underline the lesser role of social cues and knowledge of clock time. This particular approach will permit the administration of timed medication to sighted humans under free-running conditions.
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Publisher Wiley Place of Publication Editor
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Call Number IDA @ john @ Serial 1098
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Author Bergen; F.; Abs, M.
Title Etho-ecological study of the singing activity of the blue tit (parus caeruleus), great tit (parus major) and chaffinch (fringilla coelebs). Type Journal Article
Year (up) 1997 Publication J Ornithol Abbreviated Journal
Volume 138 Issue Pages 451-467
Keywords Animals
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Call Number LoNNe @ christopher.kyba @ Serial 410
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Author Gannon; M.R.; Willig, M.R.
Title The effect of lunar illumination on movement and activity of the red fig-eating bat (stenoderma rufum). Type Journal Article
Year (up) 1997 Publication Biotropica Abbreviated Journal
Volume 29 Issue 4 Pages 525-529
Keywords Animals
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Call Number LoNNe @ christopher.kyba @ Serial 411
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Author Yela; J.L.; Holyoak, M.
Title Effects of moonlight and meteorological factors on light and bait trap catches of noctuid moths (lepidoptera: Noctuidae). Type Journal Article
Year (up) 1997 Publication Environ Entomol Abbreviated Journal
Volume 26 Issue Pages 1283-1290
Keywords Animals
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Call Number LoNNe @ christopher.kyba @ Serial 412
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