Moonrise timing is key for synchronized spawning in coral Dipsastraea speciosa
Moonrise timing is key for synchronized spawning in coral Dipsastraea speciosa
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DOI：
10.1073/pnas.2101985118
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发表时间：
2021-08-24
影响因子：
11.1
通讯作者：
Nozawa, Yoko
中科院分区：
文献类型：
--
作者：
Lin, Che-Hung;Takahashi, Shunichi;Nozawa, Yoko
珊瑚的同步大规模产卵通常发生在每年满月后的几天内。预计产卵日是由珊瑚感知由月球周期调节的环境变化决定的（即，潮汐或月光）;然而，确切的调节机制仍然未知。在这里，我们展示了月光如何影响珊瑚，Dipsastraea speciosa的产卵过程。当珊瑚在该领域的阴影满月前1和3天或满月后1天，产卵总是发生在5天后，遮光开始。这些结果表明，月光抑制产卵：实验室实验中，我们监测实验月光（夜光）对产卵日的影响支持的假设。实验室中不同的夜光处理表明，日光和夜光条件之间存在黑暗期，消除了夜光对产卵的抑制作用。在自然界中，月升在月球周期的过程中逐渐变晚，在满月之后的日落之后转移。我们的研究结果表明，日落和月出之间的黑暗时期触发了D。大自然中的美丽花
Synchronized mass coral spawning typically occurs several days after a full moon once a year. It is expected that spawning day is determined by corals sensing environmental change regulated by the lunar cycle (i.e., tide or moonlight); however, the exact regulatory mechanism remains unknown. Here, we demonstrate how moonlight influences the spawning process of coral, Dipsastraea speciosa. When corals in the field were shaded 1 and 3 d before the full moon or 1 d after the full moon, spawning always occurred 5 d after shading commenced. These results suggest moonlight suppresses spawning: a hypothesis supported by laboratory experiments in which we monitored the effects of experimental moonlight (night-light) on spawning day. Different night-light treatments in the laboratory showed that the presence of a dark period between day-light and night-light conditions eliminates the suppressive effect of night-light on spawning. In nature, moonrise gets progressively later during the course of the lunar cycle, shifting to after sunset following the day of the full moon. Our results indicate that this period of darkness between sunset and moonrise triggers synchronized mass spawning of D. speciosa in nature.