| Records |
Author  |
Aschoff, J. |
| Title |
Comparative physiology: diurnal rhythms |
Type |
Journal Article |
| Year |
1963 |
Publication |
Annual Review of Physiology |
Abbreviated Journal |
Annu Rev Physiol |
| Volume |
25 |
Issue |
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Pages |
581-600 |
| Keywords |
Human Health; Adaptation, Physiological; *Periodicity; *Adaptation, Physiological; *Periodicity |
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| Language |
English |
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Series Issue |
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Edition |
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| ISSN |
0066-4278 |
ISBN |
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| Notes |
PMID:13965146 |
Approved |
no |
| Call Number |
LoNNe @ kagoburian @ |
Serial |
710 |
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| Author |
Cajochen, C.; Altanay-Ekici, S.; Munch, M.; Frey, S.; Knoblauch, V.; Wirz-Justice, A. |
| Title |
Evidence that the lunar cycle influences human sleep |
Type |
Journal Article |
| Year |
2013 |
Publication |
Current Biology : CB |
Abbreviated Journal |
Curr Biol |
| Volume |
23 |
Issue |
15 |
Pages |
1485-1488 |
| Keywords |
Adult; Aged; Cross-Sectional Studies; Electroencephalography; Female; Humans; Hydrocortisone/analysis/metabolism; Male; Melatonin/analysis/metabolism; Middle Aged; Moon; Nontherapeutic Human Experimentation; Periodicity; Saliva/metabolism; Sleep/*physiology; Sleep Stages/physiology; Young Adult |
| Abstract |
Endogenous rhythms of circalunar periodicity ( approximately 29.5 days) and their underlying molecular and genetic basis have been demonstrated in a number of marine species [1, 2]. In contrast, there is a great deal of folklore but no consistent association of moon cycles with human physiology and behavior [3]. Here we show that subjective and objective measures of sleep vary according to lunar phase and thus may reflect circalunar rhythmicity in humans. To exclude confounders such as increased light at night or the potential bias in perception regarding a lunar influence on sleep, we retrospectively analyzed sleep structure, electroencephalographic activity during non-rapid-eye-movement (NREM) sleep, and secretion of the hormones melatonin and cortisol found under stringently controlled laboratory conditions in a cross-sectional setting. At no point during and after the study were volunteers or investigators aware of the a posteriori analysis relative to lunar phase. We found that around full moon, electroencephalogram (EEG) delta activity during NREM sleep, an indicator of deep sleep, decreased by 30%, time to fall asleep increased by 5 min, and EEG-assessed total sleep duration was reduced by 20 min. These changes were associated with a decrease in subjective sleep quality and diminished endogenous melatonin levels. This is the first reliable evidence that a lunar rhythm can modulate sleep structure in humans when measured under the highly controlled conditions of a circadian laboratory study protocol without time cues. |
| Address |
Centre for Chronobiology, Psychiatric Hospital of the University of Basel, 4012 Basel, Switzerland. christian.cajochen@upkbs.ch |
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English |
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Edition |
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| ISSN |
0960-9822 |
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| Notes |
PMID:23891110 |
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no |
| Call Number |
IDA @ john @ |
Serial |
140 |
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| Author |
Foster, R.G.; Roenneberg, T. |
| Title |
Human responses to the geophysical daily, annual and lunar cycles |
Type |
Journal Article |
| Year |
2008 |
Publication |
Current Biology : CB |
Abbreviated Journal |
Curr Biol |
| Volume |
18 |
Issue |
17 |
Pages |
R784-R794 |
| Keywords |
Human Health; Biological Clocks; Birth Rate; Circadian Rhythm; Death; Female; Human Activities; Humans; Male; Moon; *Periodicity; Photoperiod; Seasons; Sexual Behavior; Sleep |
| Abstract |
Collectively the daily, seasonal, lunar and tidal geophysical cycles regulate much of the temporal biology of life on Earth. The increasing isolation of human societies from these geophysical cycles, as a result of improved living conditions, high-quality nutrition and 24/7 working practices, have led many to believe that human biology functions independently of them. Yet recent studies have highlighted the dominant role that our circadian clock plays in the organisation of 24 hour patterns of behaviour and physiology. Preferred wake and sleep times are to a large extent driven by an endogenous temporal program that uses sunlight as an entraining cue. The alarm clock can drive human activity rhythms but has little direct effect on our endogenous 24 hour physiology. In many situations, our biology and our society appear to be in serious opposition, and the damaging consequences to our health under these circumstances are increasingly recognised. The seasons dominate the lives of non-equatorial species, and until recently, they also had a marked influence on much of human biology. Despite human isolation from seasonal changes in temperature, food and photoperiod in the industrialised nations, the seasons still appear to have a small, but significant, impact upon when individuals are born and many aspects of health. The seasonal changes that modulate our biology, and how these factors might interact with the social and metabolic status of the individual to drive seasonal effects, are still poorly understood. Lunar cycles had, and continue to have, an influence upon human culture, though despite a persistent belief that our mental health and other behaviours are modulated by the phase of the moon, there is no solid evidence that human biology is in any way regulated by the lunar cycle. |
| Address |
Circadian and Visual Neuroscience, Nuffield Laboratory of Ophthalmology, University of Oxford, Levels 5 & 6 West Wing, John Radcliffe Hospital, Headley Way, Oxford OX3 7BN, UK. russell.foster@eye.ox.ac.uk |
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English |
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Edition |
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| ISSN |
0960-9822 |
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| Notes |
PMID:18786384 |
Approved |
no |
| Call Number |
LoNNe @ kagoburian @ |
Serial |
752 |
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| Author |
Mercier, A.; Ycaza, R.; Hamel, J. |
| Title |
Long-term study of gamete release in a broadcast-spawning holothurian: predictable lunar and diel periodicities |
Type |
Journal Article |
| Year |
2007 |
Publication |
Marine Ecology Progress Series |
Abbreviated Journal |
Mar. Ecol. Prog. Ser. |
| Volume |
329 |
Issue |
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Pages |
179-189 |
| Keywords |
Spawning; Periodicity; Lunar cycle; Reproductive synchrony; Holothurians; Echinoderms; Isostichopus fuscus |
| Abstract |
Annual and monthly patterns of gamete release by the sea cucumber Isostichopus fuscus on the coast of Ecuador were studied to determine the proximal spawning cue and variations in reproductive output throughout the year. Several hundred newly collected individuals were monitored nearly every month for 4 yr. I. fuscus displayed a lunar spawning periodicity: 0.7 to 34.9% of individuals consistently spawned 1 to 4 d after the new moon. Spawning mostly occurred within one evening; however, some gamete release was often recorded over 2 to 4 consecutive evenings. Individuals maintained in captivity for several months retained their spawning periodicity and timing with the lunar cycle. Conversely, newly caught individuals that were shaded from the moonlight did not spawn, thus demonstrating the apparent lack of endogenous rhythms and prevalence of lunar luminance over other cues (i.e. tidal cycle, fluctuations in barometric pressure). On a spawning night, males typically initiated gamete release around sunset; females spawned just after the peak male broadcast. The percentage of spawning individuals was higher and a greater overlap between male and female peak spawning activity was observed during clear conditions compared with overcast conditions. The gonads of individuals that did not spawn in a given month showed a variety of maturity levels, including post-spawning, growth and mature gametogenic stages. Hence, the individual reproductive cycle is apparently longer than the monthly spawning periodicity observed at the population level, enabling I. fuscus populations to be reproductive year round. |
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0171-8630 |
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no |
| Call Number |
IDA @ john @ |
Serial |
104 |
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| Author |
Shima, J.S.; Osenberg, C.W.; Noonburg, E.G.; Alonzo, S.H.; Swearer, S.E. |
| Title |
Lunar rhythms in growth of larval fish |
Type |
Journal Article |
| Year |
2021 |
Publication |
Proceedings. Biological Sciences |
Abbreviated Journal |
Proc Biol Sci |
| Volume |
288 |
Issue |
1942 |
Pages |
20202609 |
| Keywords |
Moonlight; Animals; developmental history; larval growth; lunar periodicity; reef fish; trophic connectivity |
| Abstract |
Growth and survival of larval fishes is highly variable and unpredictable. Our limited understanding of this variation constrains our ability to forecast population dynamics and effectively manage fisheries. Here we show that daily growth rates of a coral reef fish (the sixbar wrasse, Thalassoma hardwicke) are strongly lunar-periodic and predicted by the timing of nocturnal brightness: growth was maximized when the first half of the night was dark and the second half of the night was bright. Cloud cover that obscured moonlight facilitated a 'natural experiment', and confirmed the effect of moonlight on growth. We suggest that lunar-periodic growth may be attributable to light-mediated suppression of diel vertical migrations of predators and prey. Accounting for such effects will improve our capacity to predict the future dynamics of marine populations, especially in response to climate-driven changes in nocturnal cloud cover and intensification of artificial light, which could lead to population declines by reducing larval survival and growth. |
| Address |
School of BioSciences, University of Melbourne, Parkville, Victoria, Australia |
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English |
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Edition |
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| ISSN |
0962-8452 |
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| Notes |
PMID:33434460 |
Approved |
no |
| Call Number |
GFZ @ kyba @ |
Serial |
3249 |
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