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Tuttle, B. T., Anderson, S. J., Sutton, P. C., Elvidge, C. D., & Baugh, K. |
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Title |
It Used To Be Dark Here |
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2013 |
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American Society for Photogrammetry and Remote Sensing |
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3 |
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11 |
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287-297 |
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Remote Sensing |
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Nighttime satellite imagery from the Defense Meteorological Satellite Program (DMSP) Operational Linescan System (OLS) has a unique capability to observe nocturnal light emissions from sources including cities, wild fires, and gas flares. Data from the DMSP OLS is used in a wide range of studies including mapping urban areas, estimating informal economies, and estimations of population. Given the extensive and increasing list of applications a repeatable method for assessing geolocation accuracy would be beneficial. An array of portable lights was designed and taken to multiple field sites known to have no other light sources. The lights were operated during nighttime overpasses by the DMSP OLS and observed in the imagery. An assessment of the geolocation accuracy was performed by measuring the distance between the GPS measured location of the lights and the observed location in the imagery. A systematic shift was observed and the mean distance was measured at 2.9 km. |
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IDA @ intern @ |
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2520 |
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Author |
Grunsven van, Roy H.A.; Creemers, Raymond; Joosten, Kris; Donners Maurice; Veenendaal, Elmar M. |
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Title |
Behaviour of migrating toads under artificial lights differs from other phases of their life cycle |
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Journal Article |
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2016 |
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Amphibia-Reptilia |
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AMRE |
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animal, amphibia, Anura, fragmentation, light pollution, mitigation, phototaxis, spectra |
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LoNNe @ schroer @ |
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1568 |
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Schmiedel, J. |
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Title |
Auswirkungen künstlicher Beleuchtung auf die Tierwelt – ein Überblick. Schriftenr. |
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Journal Article |
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2001 |
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andschaftspfl. Natursch. |
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67 |
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19-51 |
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Animals |
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LoNNe @ kagoburian @ |
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693 |
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Pauers, M.J.; Kuchenbecker, J.A.; Neitz, M.; Neitz, J. |
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Title |
Changes in the colour of light cue circadian activity |
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2012 |
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Animal Behaviour |
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Anim Behav |
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83 |
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5 |
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1143-1151 |
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melanopsin; Circadian Rhythm; physiology of vision; biology |
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The discovery of melanopsin, the non-visual opsin present in intrinsically photosensitive retinal ganglion cells (ipRGCs), has created great excitement in the field of circadian biology. Now, researchers have emphasized melanopsin as the main photopigment governing circadian activity in vertebrates. Circadian biologists have tested this idea under standard laboratory, 12h Light: 12h Dark, lighting conditions that lack the dramatic daily colour changes of natural skylight. Here we used a stimulus paradigm in which the colour of the illumination changed throughout the day, thus mimicking natural skylight, but luminance, sensed intrinsically by melanopsin containing ganglion cells, was kept constant. We show in two species of cichlid, Aequidens pulcher and Labeotropheus fuelleborni, that changes in light colour, not intensity, are the primary determinants of natural circadian activity. Moreover, opponent-cone photoreceptor inputs to ipRGCs mediate the sensation of wavelength change, and not the intrinsic photopigment, melanopsin. These results have implications for understanding the evolutionary biology of non-visual photosensory pathways and answer long-standing questions about the nature and distribution of photopigments in organisms, including providing a solution to the mystery of why nocturnal animals routinely have mutations that interrupt the function of their short wavelength sensitive photopigment gene. |
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Department of Ophthalmology, University of Washington Medical School, 1959 NE Pacific Street, Seattle, Washington, 98195, USA |
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English |
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0003-3472 |
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PMID:22639465; PMCID:PMC3358782 |
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IDA @ john @ |
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30 |
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Buchanan, B.W. |
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Title |
Effects of enhanced lighting on the behaviour of nocturnal frogs |
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1993 |
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Animal Behaviour |
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Animal Behaviour |
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45 |
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5 |
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893-899 |
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animals; amphibians; frogs; grey treefrog; Hyla chrysoscelis; foraging; infrared |
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Biologists studying anuran amphibians usually assume that artificial, visible light does not affect the behaviour of nocturnal frogs. This assumption was tested in a laboratory experiment. The foraging behaviour of grey treefrogs, Hyla chrysoscelis, was compared under four lighting conditions: ambient light (equivalent to bright moonlight, 0·003 lx), red-filtered light (4·1 lx), low-intensity 'white' light (3·8 lx), and high-intensity 'white' light (12·0 lx). The treatments were chosen to correspond to standard methods of field observation of frog behaviour. The foraging behaviour of frogs in the four treatments was observed using infra-red light that was invisible to the frogs. The ability of the frogs to detect, and subsequently consume prey was significantly reduced under all of the enhanced light treatments relative to the ambient light treatment. Thus, the use of artificial light, within the visible spectrum of the frogs' eyes, can influence the outcome of nocturnal behavioural observations. These results lead to the recommendation that anuran biologists use infra-red or light amplification devices when changes in frogs' visual capabilities may influence the conclusions drawn from a study. |
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0003-3472 |
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IDA @ john @ |
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72 |
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