2012 Fiscal Year Final Research Report
How do tropical fish recognize season? A comparative approach of tropical monsoon around the equator
| Project/Area Number |
22405029
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 海外学術 |
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| Research Field |
General fisheries
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| Research Institution | University of the Ryukyus |
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Principal Investigator |
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| Project Period (FY) |
2010 – 2012
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| Keywords | サンゴ礁 / アイゴ / モンスーン / 年周期 / 環境 / フィリッピ / インドネシア |
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| Research Abstract |
The aim of the present study was to clarify environmental factor(s) in relation to reproductive activity in tropical fish and to examine a possible mechanism that transduces environmental stimuli into the internal signal. Two spinefoots species used in the present study had a clear reproductive cycle that is closely correlated with tropical monsoon. During the spawning season, each species spawned around the species-selective lunar phase. We also focused on the expression of clock gene (Cry) in thehypothalamus of the goldlined spinfoot. The expression pattern of this gene fluctuated with lunar cycle and peaked around the first quarter moon, suggesting that clock genes is related to oscillation of lunar-related activity including reproduction.
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Research Products
(15 results)
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[Journal Article] Lunar phase-dependent expression of cryptochrome predicts a photoperiodic mechanisms for lunar phase-recognition in rabbitfish2011
Author(s)
Fukushiro, M., Takeuchi, T., Takeuchi, Y., Hur, S.P., Sugama, N., Takemura, A., Kubo, Y., Okano, K. and Okano, T
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Journal Title
PLoS ONE
Volume: 6
Pages: e28643
DOI
Peer Reviewed
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[Presentation] Expression patterns of type II iodothyronine deiodinase (D2) gene in the hypothalamus of Siganus guttatus. 7th Western Indian Ocean Marine Association (WIOMA) Symposium2011
Author(s)
Wambiji, N., Park, Y.J., Kim, S.J., Hur, S.P., Takeuchi, Y. And Takemura, A
Organizer
7th Western Indian Ocean Marine Association (WIOMA) Symposium (24thOctober)
Place of Presentation
Mombasa, Kenya
Year and Date
20110000
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[Presentation] Molecular cloning, characterization and expression of iodothyronine deiodinase (Type II and III) in the liver of the golden spinefoot, Siganus guttatus. 7th Western Indian Ocean Marine Association (WIOMA) Symposium.2011
Author(s)
Wambiji, N., Park, Y.J., Kim, S.J., Hur, S.P., Takeuchi, Y. And Takemura, A
Organizer
7th Western Indian Ocean Marine Association (WIOMA) Symposium. 7th Western Indian Ocean Marine Association (WIOMA) Symposium (24th October)
Place of Presentation
Mombasa, Kenya
Year and Date
20110000
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