Cited by 50Circadian rhythm and melatoninPhysiological and biochemical adaptationsImpact of Light on Environment and Health

Effects of moonlight exposure on plasma melatonin rhythms in the seagrass rabbitfish, Siganus canaliculatus

Rahman, Md. Saydur, Kim, Byung-Ho, Takemura, Akihiro, Park, Chang-Bum, Lee, Young-Don·2004·Journal of Biological Rhythms

Abstract

Influences of light-dark (LD) cycle and moonlight exposure on plasma melatonin rhythms in the seagrass rabbitfish, Siganus canaliculatus, a lunar synchronized spawner, were determined by time-resolved fluoroimmunoassay (TR-FIA). When the fish were exposed to a natural LD (12:12) cycle, plasma melatonin levels exhibited a clear daily rhythm, with higher levels at midnight and lower levels during the day. These rhythms were not evident under either constant light (LL) or constant dark (DD) conditions. Plasma melatonin levels under LL condition were low and high under DD condition. These results indicate that plasma melatonin rhythms are driven by LD cycle in this species. When the fish were exposed to the 4 lunar phases, plasma melatonin levels around the new moon were significantly higher than during the first quarter moon and the full moon. Exposure to experimental new moon and full moon conditions caused significant increases and decreases of plasma melatonin levels, respectively. The synchronous rhythmicity of melatonin levels in the plasma support the hypothesis that the seagrass rabbitfish perceives moonlight intensity and responds with secretion of melatonin into the bloodstream.

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Crossref · 10.1177/0748730404266712

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Authors
Rahman, M. S., Kim, B.-H., Takemura, A., Park, C.-B., & Lee, Y.-D.
Affiliations
  • University of the Ryukyus (JP)
  • Jeju National University (KR)
Corresponding author
Rahman, Md. Saydur
Venue
Journal of Biological Rhythms
Published
2004-08
Volume
19
Issue
4
Pages
325-334
ISSN
  • 0748-7304 (ISSN-L)
  • 1552-4531
OpenAlex
W2011075482
Cited by
50
References
57
Citations by year
2025: 1 · 2023: 2 · 2022: 5 · 2020: 5 · 2019: 4 · 2018: 4 · 2017: 1 · 2014: 4 · 2013: 2 · 2012: 1
FWCI
0.70
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Biological Rhythms (publishedVersion)
  • PubMed (publishedVersion)
Funders
Japan Society for the Promotion of Science
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Physical Sciences › Environmental Science › Ecology › Physiological and biochemical adaptations
  • Physical Sciences › Environmental Science › Global and Planetary Change › Impact of Light on Environment and Health
Keywords
plasma melatonin, melatonin rhythm, Siganus canaliculatus, lunar phases, light-dark cycle, constant light, constant darkness, lunar spawning
MeSH terms
Animals, Darkness, Fluorescent Antibody Technique, Light, Melatonin, Perciformes, Moon

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