کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6327517 | 1619766 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spotlight on fish: Light pollution affects circadian rhythms of European perch but does not cause stress
ترجمه فارسی عنوان
توجه ویژه به ماهی: آلودگی نور، ریتم های شبانه روزانه ی اروپایی را تحت تاثیر قرار می دهد اما باعث ایجاد تنش می شود
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
چکیده انگلیسی
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, 0Â lx (control), 1Â lx (potential light level in urban waters), 10Â lx (typical street lighting at night) and 100Â lx. Melatonin and cortisol concentrations were measured from water samples every 3Â h during a 24Â hour period. This study revealed that the nocturnal increase in melatonin production was inhibited even at the lowest light level of 1Â 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 1Â lx are already found in urban waters. However, enhanced stress induction could not be demonstrated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volume 511, 1 April 2015, Pages 516-522
Journal: Science of The Total Environment - Volume 511, 1 April 2015, Pages 516-522
نویسندگان
Anika Brüning, Franz Hölker, Steffen Franke, Torsten Preuer, Werner Kloas,