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Author Muralidhar, P.; Srihari, V.
Title Excessive light is another form of pollution on the environment Type Journal Article
Year 2016 Publication ACADEMICIA: An International Multidisciplinary Research Journal Abbreviated Journal Academicia: An Inter. Multidiscipl. Rese. Jour.
Volume 6 Issue 8 Pages 19
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ISSN 2249-7137 ISBN Medium
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Call Number LoNNe @ kyba @ Serial 1535
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Author Grunsven van, Roy H.A.; Creemers, Raymond; Joosten, Kris; Donners Maurice; Veenendaal, Elmar M.
Title Behaviour of migrating toads under artificial lights differs from other phases of their life cycle Type Journal Article
Year 2016 Publication Amphibia-Reptilia Abbreviated Journal AMRE
Volume Issue Pages
Keywords (up) animal, amphibia, Anura, fragmentation, light pollution, mitigation, phototaxis, spectra
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Call Number LoNNe @ schroer @ Serial 1568
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Author Brüning A., Hölker, F., Franke, S., Preuer, T., Kloas, W.
Title Impact of different colours of artificial light at night on melatonin rhythm and gene expression of gonadotropins in European perch Type Journal Article
Year 2016 Publication Science of The Total Environment Abbreviated Journal
Volume 543 Issue Pages 214-222
Keywords (up) Animals
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Call Number LoNNe @ schroer @ Serial 1294
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Author Last, K. S.; Hobbs, L.; Berge, J.; Brierley, A. S.; Cottier, F.
Title Moonlight Drives Ocean-Scale Mass Vertical Migration of Zooplankton during the Arctic Winter Type Journal Article
Year 2016 Publication Current Biology Abbreviated Journal Current Biology
Volume 26 Issue 2 Pages 244-251
Keywords (up) animals
Abstract In extreme high-latitude marine environments that are without solar illumination in winter, light-mediated patterns of biological migration have historically been considered non-existent [ 1 ]. However, diel vertical migration (DVM) of zooplankton has been shown to occur even during the darkest part of the polar night, when illumination levels are exceptionally low [ 2, 3 ]. This paradox is, as yet, unexplained. Here, we present evidence of an unexpected uniform behavior across the entire Arctic, in fjord, shelf, slope and open sea, where vertical migrations of zooplankton are driven by lunar illumination. A shift from solar-day (24-hr period) to lunar-day (24.8-hr period) vertical migration takes place in winter when the moon rises above the horizon. Further, mass sinking of zooplankton from the surface waters and accumulation at a depth of ∼50 m occurs every 29.5 days in winter, coincident with the periods of full moon. Moonlight may enable predation of zooplankton by carnivorous zooplankters, fish, and birds now known to feed during the polar night [ 4 ]. Although primary production is almost nil at this time, lunar vertical migration (LVM) may facilitate monthly pulses of carbon remineralization, as they occur continuously in illuminated mesopelagic systems [ 5 ], due to community respiration of carnivorous and detritivorous zooplankton. The extent of LVM during the winter suggests that the behavior is highly conserved and adaptive and therefore needs to be considered as “baseline” zooplankton activity in a changing Arctic ocean [ 6–9 ].
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ISSN 0960-9822 ISBN Medium
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Call Number LoNNe @ kyba @ Serial 1329
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Author Okuliarova, M.; Molcan, L.; Zeman, M.
Title Decreased emotional reactivity of rats exposed to repeated phase shifts of light-dark cycle Type Journal Article
Year 2016 Publication Physiology & Behavior Abbreviated Journal Physiology & Behavior
Volume 156 Issue Pages 16-23
Keywords (up) Animals
Abstract Disturbed light–dark (LD) cycles are associated with circadian disruption of physiological and behavioural rhythms and in turn with an increased risk of disease development. However, direct causal links and underlying mechanisms leading to negative health consequences still need to be revealed. In the present study, we exposed male Wistar rats to repeated phase shifts of LD cycle and analysed their ability to cope with mild emotional stressors. In experiment 1, rats were submitted to either a regular 12:12 LD cycle (CTRL rats) or 8-h phase delay shifts applied every 2 days for 5 weeks (SHIFT rats). Subsequently, the behaviour was examined in the open-field, black–white box and elevated plus maze tests. In experiment 2, changes in blood pressure (BP), heart rate (HR) as well as the activity of autonomic nervous system were measured in telemeterised rats in response to open-field and black–white box tests before and after 5-week exposure to shifted LD regime. Locomotor activity was consistently higher in SHIFT than CTRL rats in in the open-field and black–white box tests. Interestingly, in the elevated plus maze, SHIFT rats displayed increased risk assessment and decreased grooming compared to CTRL rats. Anxiety measures were affected only in the black–white box, where SHIFT rats displayed reduced anxiety-like behaviour compared to CTRL rats. Differences in behavioural reactivity between SHIFT and CTRL rats did not correspond with BP and HR changes. However, exposure to phase shifts increased the sympathovagal reactivity in the black–white box. Together, our results demonstrated that disturbed LD conditions decreased emotional reactivity of rats and affected their ability to cope with emotional stressors denoting an additional risk mechanism linking disrupted circadian organisation to adverse health effects.
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ISSN 0031-9384 ISBN Medium
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Call Number LoNNe @ kyba @ Serial 1331
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