Comparative studies on reproductive cycle of reef fishes : approach from environmental changes in tropical waters
| Project/Area Number |
19405031
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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 |
TAKEMURA Akihiro University of the Ryukyus, 理学部, 教授 (40222103)
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| Research Collaborator |
SUSILO Endang sri ディポネゴロ大学, 海洋科学科, 講師
SURYONO Chrisna adhi ディポネゴロ大学, 海洋科学科, 講師
ROCHADI Baskoro ディポネゴロ大学, 海洋科学科, 講師
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| Project Period (FY) |
2007 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥13,390,000 (Direct Cost: ¥10,300,000、Indirect Cost: ¥3,090,000)
Fiscal Year 2009: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2008: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2007: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
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| Keywords | サンゴ礁 / アイゴ / 熱帯 / 年周期 / 環境 / アィゴ / 産卵 / 組織学 |
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| Research Abstract |
The aim of the present study was to clarify how fish adapted to tropical monsoon environments repeat their annual reproductive cycle. The orange-spotted spinefoot inhabit coral reefs in Indonesia started their gonadal maturation between rainy and dry season. Annual change in primary production in the coral reefs was roughly correlated with that in gonadal maturation, suggesting that in addition to photoperiod and temperature, nutritive condition play a role in initiation of reproductive activity in this fish species. Several light- and nutrition-related genes expressed in the hypothalamus changed according to experimental conditions that mimicked monsoon environments. It was suggested that these genes transduce changes in aquatic environments and activate the higher parts of the reproductive endocrine axis.
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Report
(4 results)
Research Products
(65 results)
