1 School of BioSciences, University of Melbourne , Victoria 3010 , Australia.
3 College of Science and Engineering, Flinders University , South Australia 5042 , Australia.
Biol Lett. 2019 Jul 26;15(7):20190272. doi: 10.1098/rsbl.2019.0272. Epub 2019 Jul 10.
The Earth is getting brighter at night, as artificial light at night (ALAN) continues to increase and extend its reach. Despite recent recognition of the damaging impacts of ALAN on terrestrial ecosystems, research on ALAN in marine systems is comparatively lacking. To further our understanding of the impacts of ALAN on marine organisms, this study examines how the reproductive fitness of the common clownfish Amphiprion ocellaris is influenced by the presence of ALAN. We assessed how exposure to low levels of ALAN affects (i) frequency of spawning, (ii) egg fertilization success, and (iii) hatching success of A. ocellaris under control (12 : 12 day-night) and treatment (12 : 12 day-ALAN) light regimes. While we found exposure to ALAN had no impact on the frequency of spawning or fertilization success, ALAN had dramatic effects on hatching. Amphiprion ocellaris eggs incubated in the presence of ALAN simply did not hatch, resulting in zero survivorship of offspring. These findings suggest ALAN can significantly reduce reproductive fitness in a benthic-spawning reef fish. Further research in this field is necessary to fully understand the extent of this impact on population and community dynamics in the wild.
地球在夜间变得越来越亮，因为夜间人工光 (ALAN) 持续增加并扩大其影响范围。尽管最近人们已经认识到 ALAN 对陆地生态系统的破坏性影响，但对海洋系统中 ALAN 的研究相对较少。为了进一步了解 ALAN 对海洋生物的影响，本研究探讨了普通小丑鱼 Amphiprion ocellaris 的生殖适应性如何受到 ALAN 的影响。我们评估了在控制（12 : 12 日夜）和处理（12 : 12 日夜-ALAN）光照条件下，低水平 ALAN 暴露如何影响：(i) 产卵频率，(ii) 卵受精成功率，以及 (iii) A.ocellaris 的孵化成功率。虽然我们发现 ALAN 暴露对产卵频率或受精成功率没有影响，但 ALAN 对孵化有显著影响。在 ALAN 存在的情况下孵化的 Amphiprion ocellaris 卵根本没有孵化，导致后代的存活率为零。这些发现表明，ALAN 可以显著降低底栖产卵礁鱼的生殖适应性。需要在该领域进行进一步研究，以充分了解这对野生种群和群落动态的影响程度。
