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Author Brüning A., Hölker, F., Franke, S., Preuer, T., Kloas, W. url  doi
openurl 
  Title Spotlight on fish: Light pollution affects circadian rhythms of European perch but does not cause stress Type Journal Article
  Year 2015 Publication Science of The Total Environment Abbreviated Journal Sci Total Environ  
  Volume (down) 511 Issue Pages 516-522  
  Keywords Animals; Perca fluviatilis; Light pollution; Light intensity; Non-invasive hormone measurement; Fish  
  Abstract Flora and fauna evolved under natural day and night cycles. However, natural light is now enhanced by artificial light at night, particularly in urban areas. This alteration of natural light environments during the night is hypothesised to alter biological rhythms in fish, by effecting night-time production of the hormone melatonin. Artificial light at night is also expected to increase the stress level of fish, resulting in higher cortisol production. In laboratory experiments, European perch (Perca fluviatilis) were exposed to four different light intensities during the night, 0 lx (control), 1 lx (potential light level in urban waters), 10 lx (typical street lighting at night) and 100 lx. Melatonin and cortisol concentrations were measured from water samples every 3 h during a 24 hour period. This study revealed that the nocturnal increase in melatonin production was inhibited even at the lowest light level of 1 lx. However, cortisol levels did not differ between control and treatment illumination levels. We conclude that artificial light at night at very low intensities may disturb biological rhythms in fish since nocturnal light levels around 1 lx are already found in urban waters. However, enhanced stress induction could not be demonstrated.  
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  Call Number LoNNe @ schroer @ Serial 1087  
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Author Brüning, A.; Hölker, F.; Franke, S.; Preuer, T.; Kloas, W. url  openurl
  Title Spotlight on fish: Light pollution affects circadian rhythms of European perch but does not cause stress Type Journal Article
  Year 2015 Publication Science of The Total Environment Abbreviated Journal  
  Volume (down) 511 Issue Pages 516-522  
  Keywords animals; fish; Circadian Rhythm; melatonin; cortisol  
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  Notes Approved no  
  Call Number LoNNe @ schroer @ Serial 1580  
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Author Tollefson, J. url  openurl
  Title Energy: Islands of Light Type Journal Article
  Year 2014 Publication Nature Abbreviated Journal  
  Volume (down) 507 Issue 7491 Pages 154-156  
  Keywords Ecology  
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  Notes Approved no  
  Call Number LoNNe @ kagoburian @ Serial 825  
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Author Hou, Z.-S.; Wen, H.-S.; Li, J.-F.; He, F.; Li, Y.; Qi, X.; Zhao, J.; Zhang, K.-Q.; Tao, Y.-X. url  doi
openurl 
  Title Effects of photoperiod and light Spectrum on growth performance, digestive enzymes, hepatic biochemistry and peripheral hormones in spotted sea bass (Lateolabrax maculatus) Type Journal Article
  Year 2019 Publication Aquaculture Abbreviated Journal Aquaculture  
  Volume (down) 507 Issue Pages 419-427  
  Keywords Animals; fishes; spotted sea bass; Lateolabrax maculatus; Photoperiod  
  Abstract Growth performance, digestive and metabolic activities, and contents of peripheral hormones of spotted sea bass (Lateolabrax maculatus) juveniles were evaluated under natural light and three different light spectrums (white, blue and red) in combination with three photoperiods (light: dark cycle, 12: 12-h, 18: 6-h and 24: 0-h). Bass in 18-h blue light environment displayed the best growth performance and digestive enzyme activities, while red light environment significantly impeded growth and digestive enzyme activities. Altered contents of melatonin, cortisol, thyroid hormones (T3 and T4), and testosterone (T) were observed in bass reared in red light, suggesting that red light could disturb endocrine homeostasis associated with biological rhythm (melatonin), stress coping (melatonin and cortisol), growth and development (T3 and T4), and aggressive behavior or hyperactivity (T3, T4 and T). Impaired growth performance might be due to energy used to cope with stress. We concluded that the red spectrum environment was stressful to spotted bass and the selection of appropriate light conditions (such as 18-h blue light) might lead to a beneficial outcome for spotted sea bass culture.  
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  ISSN 0044-8486 ISBN Medium  
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  Notes Approved no  
  Call Number GFZ @ kyba @ Serial 2329  
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Author Cruz, L.M.; Shillinger, G.L.; Robinson, N.J.; Tomillo, P.S.; Paladino, F.V. url  doi
openurl 
  Title Effect of light intensity and wavelength on the in-water orientation of olive ridley turtle hatchlings Type Journal Article
  Year 2018 Publication Journal of Experimental Marine Biology and Ecology Abbreviated Journal Journal of Experimental Marine Biology and Ecology  
  Volume (down) 505 Issue Pages 52-56  
  Keywords Animals  
  Abstract Light pollution, associated with coastal development, poses a growing threat to sea turtles. Hatchlings are particularly affected during their crawl to the ocean since they exhibit phototaxis and may move towards or be disoriented by artificial lights. Although much is known about how hatchlings respond to artificial light while crawling to the ocean, far less is known about their response after reaching the water. Here, we investigate how hatchling olive ridley turtles (Lepidochelys olivacea) held in artificial pools responded to light of different wavelengths (red, 720 nm; yellow, 660 nm and green, 520 nm) and intensities (0.1–3.3 lx, mean 0.87 lx, SD = 0.85, 10.3–45.9 lx, mean 15.75 lx,SD = 7.12; 47.5–84.2 lx; mean 52.02 lx, SD = 9.11; 91.3–140.8 lx, mean 105 lx, SD = 13.24; 150.1–623 lx, mean 172.18 lx, SD = 73.42). When no light or red light below 39 lx was present, hatchlings oriented at a mean angle of 180° from true north and did not orient towards any discernable feature. However, hatchlings swam towards the light at intensities of red light above 39 lx, yellow light above 10 lx and green light above 5 lx. Our findings indicate that sea turtles will swim towards artificial lights even after reaching the water. Thus, we recommend light mitigation efforts should extend beyond nesting beaches and into the associated oceanic habitats.  
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  Series Volume Series Issue Edition  
  ISSN 0022-0981 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number GFZ @ kyba @ Serial 1894  
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