Regulatory mechanism of vitellogenesis-inhibiting hormone in the kuruma prawn Marsupenaeus japonicus
Project/Area Number |
22580216
|
Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
General fisheries
|
Research Institution | Fisheries Research Agency |
Principal Investigator |
OKUMURA Takuji 独立行政法人水産総合研究センター, 増養殖研究所, 主幹研究員 (30372030)
|
Co-Investigator(Kenkyū-buntansha) |
OHIRA Tsuyoshi 神奈川大学, 理学部, 准教授 (10361809)
|
Project Period (FY) |
2010 – 2012
|
Project Status |
Completed (Fiscal Year 2012)
|
Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2011: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2010: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
|
Keywords | 生理 / 増養殖 / 甲殻類 / 内分泌 / クルマエビ / 卵黄蓄積 / 卵黄形成 / 甲穀類 |
Research Abstract |
In crustaceans, ovarian development is under the inhibitory regulation of vitellogenesis-inhibiting hormone (VIH) secreted from a neuroendocrine system in the eyestalks. In this study, its regulatory mechanism was investigated in the kuruma prawn Marsupenaeus japonicus. In immature shrimp, hemolymph VIH levels were constantly low. This result suggests that VIH inhibits ovarian development during the immature stage and that a decline of its levels is a trigger of the initiation of ovarian development. Furthermore, after eyestalk ablation, expression levels of several genes were found to change in the ovaries. This result suggests that various genes are involved in the initiation of ovarian development.
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Report
(4 results)
Research Products
(4 results)