State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; Behavioural Evolution Research Group, Max Planck Institute of Animal Behaviour, Buecklestr 5a, 78464 Konstanz, Germany; University of Chinese Academy of Sciences, Beijing 100039, China.
State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100039, China.
Sci Total Environ. 2024 Dec 1;954:176336. doi: 10.1016/j.scitotenv.2024.176336. Epub 2024 Sep 18.
Artificial light at night (ALAN) can disrupt the natural behaviour, physiology, and circadian rhythms of organisms exposed to it, and therefore presents a significant and widespread ecological concern. ALAN typically comprises a wide range of wavelengths, and different wavelengths have different effects on circadian clocks. In the animals investigated thus far, short and middle wavelengths are intensely involved in synchronisation and entrainment, but we still have a poor understanding of how different wavelengths might affect behaviour when animals are exposed to ALAN, in particular whether some wavelengths are disproportionally detrimental. This experiment examined the direct and transgenerational effects of 10 different wavelength treatments of ALAN on behaviour in zebrafish (Danio rerio), a diurnally active model organism. Across a 10-day period, female zebrafish were exposed to either a monochromatic wavelength, white light ALAN, or to a control treatment, and the individual impacts of each treatment on locomotion and anxiety-like behaviours were examined both for solitary fish and fish in groups. We found the strongest impact at short wavelengths (365 to 470 nm), with individuals and groups of zebrafish showing more anxiety-like behaviour after fewer nights of ALAN exposure relative to the other wavelengths. Furthermore, F1 offspring born from ALAN-exposed mothers displayed less frequent movement and shorter movement distances despite never being exposed to ALAN themselves, regardless of the spectral treatment. Our results highlight both the specific and broad-spectrum potential for ALAN to cause disruption to locomotion in adult zebrafish and their offspring.
人工夜间照明（ALAN）会扰乱暴露于其中的生物体的自然行为、生理和昼夜节律，因此成为一个重要且广泛存在的生态问题。ALAN 通常包含广泛的波长，不同波长对生物钟有不同的影响。在迄今为止研究的动物中，短波长和中波长强烈参与同步和驯化，但我们仍然不清楚当动物暴露于 ALAN 时，不同波长如何影响行为，特别是某些波长是否会不成比例地造成损害。这项实验研究了 10 种不同波长的 ALAN 处理对斑马鱼（Danio rerio）行为的直接和代际影响，斑马鱼是一种昼行性模式生物。在 10 天的时间里，雌性斑马鱼暴露于单色波长、白光 ALAN 或对照处理中，并且单独检查每种处理对单独鱼类和群体鱼类的运动和类似焦虑行为的个体影响。我们发现短波长（365 至 470nm）的影响最强，与其他波长相比，暴露于 ALAN 的个体和群体斑马鱼在夜间暴露的次数较少后表现出更多的类似焦虑行为。此外，尽管从未接触过 ALAN，但来自暴露于 ALAN 的母亲的 F1 后代表现出较少的运动频率和较短的运动距离，无论光谱处理如何。我们的研究结果强调了 ALAN 对成年斑马鱼及其后代运动产生特定和广谱干扰的潜力。
