| Records |
| Author |
Portnov, B.A.; Stevens, R.G.; Samociuk, H.; Wakefield, D.; Gregorio, D.I. |
| Title |
Light at night and breast cancer incidence in Connecticut: An ecological study of age group effects |
Type |
Journal Article |
| Year |
2016 |
Publication |
The Science of the Total Environment |
Abbreviated Journal |
Sci Total Environ |
| Volume |
572 |
Issue  |
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Pages |
1020-1024 |
| Keywords |
Human Health |
| Abstract |
The aim of this study was to test the prediction that within the state of Connecticut, USA, communities with high nighttime outdoor light level would have higher breast cancer incidence rates. Breast cancer cases were identified from the Connecticut Tumor Registry, the oldest within the United States, for years 2005 and 2009 and geocoded to the 829 census tracts in the state. Nighttime light level (LAN) was obtained from the Defense Meteorological Satellite Program (DMSP), 1996/97 satellite image, providing a 10-year lag. Regression models were used incorporating the LAN levels and census level data on potential confounders for the whole female population of the state, and for separate age groups. Light level emerged as a significant predictor of breast cancer incidence. After taking account of several potential confounders, the excess risk in the highest LAN level census tracts compared to the lowest was about 63% (RR=1.63; 95% CI=1.41, 1.89). The association of LAN with breast cancer incidence weakened with age; the association was strongest among premenopausal women. |
| Address |
Department of Community Medicine, School of Medicine, University of Connecticut, Farmington, CT 06030, United States. Electronic address: gregorio@uchc.edu |
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English |
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| ISSN |
0048-9697 |
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| Notes |
PMID:27531467 |
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no |
| Call Number |
LoNNe @ kyba @ |
Serial |
1529 |
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| Author |
Cozzolino, E.; Lasta, C.A. |
| Title |
Use of VIIRS DNB satellite images to detect jigger ships involved in the Illex argentinus fishery |
Type |
Journal Article |
| Year |
2016 |
Publication |
Remote Sensing Applications: Society and Environment |
Abbreviated Journal |
Remote Sensing Applications: Society and Environment |
| Volume |
4 |
Issue |
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Pages |
167-178 |
| Keywords |
Remote Sensing |
| Abstract |
The distribution of Illex argentinus squid extends from 23°S to 54°S. The largest catches of the species, which represents one of the most important fisheries in Argentina, take place between 35°S and 52°S. Argentina's fisheries administration keeps close records of the Argentine fleet position and the Cephalopod laboratory at the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP) monitors and suggests actions for the management of the resource. The catches are carried out both within national and adjacent international waters. Fleets from different countries participate in the fisheries operating jigger vessels during the night with strong lights to attract the squid. One of the greatest difficulties in the evaluation of the status of this resource is to know the number of foreign vessels fishing outside the Argentine Exclusive Economic Zone (EEZ). The Visible Infrared Imaging Radiometer (VIIRS) day/night band (DNB) satellite images are a useful tool to monitor and quantify these fleets, building on the capacity of the sensors to detect the light emitted by the lamps placed on the ship decks. In this work, we report the development of a specific new method (set of algorithms) to process the images and identify automatically the jigger ships that compose the overseas fleet. Results were validated using the positioning data of the Argentine jigger fleet and comparing light emissions of these vessels against those identified by the new method. The process of identifying ships has proved to be robust considering the statistical results obtained: mean relative error (MRE) of 0.03% and a root-mean-square error (RMSE) of 1.62 ships. |
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2352-9385 |
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no |
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LoNNe @ kyba @ |
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1536 |
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Flores, D.E.F.L.; Jannetti, M.G.; Valentinuzzi, V.S.; Oda, G.A. |
| Title |
Entrainment of circadian rhythms to irregular light/dark cycles: a subterranean perspective |
Type |
Journal Article |
| Year |
2016 |
Publication |
Scientific Reports |
Abbreviated Journal |
Sci Rep |
| Volume |
6 |
Issue |
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Pages |
34264 |
| Keywords |
Animals |
| Abstract |
Synchronization of biological rhythms to the 24-hour day/night has long been studied with model organisms, under artificial light/dark cycles in the laboratory. The commonly used rectangular light/dark cycles, comprising hours of continuous light and darkness, may not be representative of the natural light exposure for most species, including humans. Subterranean rodents live in dark underground tunnels and offer a unique opportunity to investigate extreme mechanisms of photic entrainment in the wild. Here, we show automated field recordings of the daily light exposure patterns in a South American subterranean rodent, the tuco-tuco (Ctenomys aff. knighti ). In the laboratory, we exposed tuco-tucos to a simplified version of this natural light exposure pattern, to determine the minimum light timing information that is necessary for synchronization. As predicted from our previous studies using mathematical modeling, the activity rhythm of tuco-tucos synchronized to this mostly simplified light/dark regimen consisting of a single light pulse per day, occurring at randomly scattered times within a day length interval. Our integrated semi-natural, lab and computer simulation findings indicate that photic entrainment of circadian oscillators is robust, even in face of artificially reduced exposure and increased phase instability of the synchronizing stimuli. |
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Institute of Biosciences, Department of Physiology, University of Sao Paulo; Sao Paulo, Sao Paulo, 05508-900; Brazil |
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2045-2322 |
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| Notes |
PMID:27698436 |
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no |
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LoNNe @ kyba @ |
Serial |
1539 |
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Raap, T.; Casasole, G.; Costantini, D.; AbdElgawad, H.; Asard, H.; Pinxten, R.; Eens, M. |
| Title |
Artificial light at night affects body mass but not oxidative status in free-living nestling songbirds: an experimental study |
Type |
Journal Article |
| Year |
2016 |
Publication |
Scientific Reports |
Abbreviated Journal |
Sci. Rep. |
| Volume |
6 |
Issue |
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Pages |
35626 |
| Keywords |
Animals |
| Abstract |
Artificial light at night (ALAN), termed light pollution, is an increasingly important anthropogenic environmental pressure on wildlife. Exposure to unnatural lighting environments may have profound effects on animal physiology, particularly during early life. Here, we experimentally investigated for the first time the impact of ALAN on body mass and oxidative status during development, using nestlings of a free-living songbird, the great tit (Parus major), an important model species. Body mass and blood oxidative status were determined at baseline (=13 days after hatching) and again after a two night exposure to ALAN. Because it is very difficult to generalise the oxidative status from one or two measures we relied on a multi-biomarker approach. We determined multiple metrics of both antioxidant defences and oxidative damage: molecular antioxidants GSH, GSSG; antioxidant enzymes GPX, SOD, CAT; total non-enzymatic antioxidant capacity and damage markers protein carbonyls and TBARS. Light exposed nestlings showed no increase in body mass, in contrast to unexposed individuals. None of the metrics of oxidative status were affected. Nonetheless, our study provides experimental field evidence that ALAN may negatively affect free-living nestlings’ development and hence may have adverse consequences lasting throughout adulthood. |
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2045-2322 |
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no |
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LoNNe @ kyba @ |
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1543 |
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Jan Stenvers, D.; van Dorp, R.; Foppen, E.; Mendoza, J.; Opperhuizen, A.-L.; Fliers, E.; Bisschop, P.H.; Meijer, J.H.; Kalsbeek, A.; Deboer, T. |
| Title |
Dim light at night disturbs the daily sleep-wake cycle in the rat |
Type |
Journal Article |
| Year |
2016 |
Publication |
Scientific Reports |
Abbreviated Journal |
Sci Rep |
| Volume |
6 |
Issue |
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Pages |
35662 |
| Keywords |
Animals |
| Abstract |
Exposure to light at night (LAN) is associated with insomnia in humans. Light provides the main input to the master clock in the hypothalamic suprachiasmatic nucleus (SCN) that coordinates the sleep-wake cycle. We aimed to develop a rodent model for the effects of LAN on sleep. Therefore, we exposed male Wistar rats to either a 12 h light (150-200lux):12 h dark (LD) schedule or a 12 h light (150-200 lux):12 h dim white light (5 lux) (LDim) schedule. LDim acutely decreased the amplitude of daily rhythms of REM and NREM sleep, with a further decrease over the following days. LDim diminished the rhythms of 1) the circadian 16-19 Hz frequency domain within the NREM sleep EEG, and 2) SCN clock gene expression. LDim also induced internal desynchronization in locomotor activity by introducing a free running rhythm with a period of ~25 h next to the entrained 24 h rhythm. LDim did not affect body weight or glucose tolerance. In conclusion, we introduce the first rodent model for disturbed circadian control of sleep due to LAN. We show that internal desynchronization is possible in a 24 h L:D cycle which suggests that a similar desynchronization may explain the association between LAN and human insomnia. |
| Address |
Laboratory for Neurophysiology, Department of Molecular Cell Biology, Leiden University Medical Center, Leiden, The Netherlands |
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English |
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2045-2322 |
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| Notes |
PMID:27762290 |
Approved |
no |
| Call Number |
LoNNe @ kyba @ |
Serial |
1547 |
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