| Project/Area Number |
62480070
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
General fisheries
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| Research Institution | Tokyo University of Fisheries |
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Principal Investigator |
TAKASHIMA Fumio Tokyo University of Fisheries, 水産学部, 教授 (60041703)
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| Co-Investigator(Kenkyū-buntansha) |
AIDA Katsumi University of Tokyo, 農学部, 助教授 (50012034)
HARUMI Kojima Tokyo University of Fisheries, 水産学部, 助手 (50106754)
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| Project Period (FY) |
1987 – 1988
|
| Project Status |
Completed (Fiscal Year 1988)
|
| Budget Amount *help |
¥4,600,000 (Direct Cost: ¥4,600,000)
Fiscal Year 1988: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1987: ¥2,800,000 (Direct Cost: ¥2,800,000)
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| Keywords | Sex reversal / Steroid / Safety / Accumulation / Distribution / Carp / Ayu / Tilapia / テラピア / コレゴヌス / 雌性発生 / ペヘレイ |
|---|
| Research Abstract |
Effective method for sex reversal by means of hormaonal treatment was investigated. Critical period for sex reversal was confirmed. Sex reversal in carp, ayu, tilapia, pejerrey and coregonus was succeeded. Effective hormones were estradiol-17 B and methyl-testosterone. The former evoked feminization and the later masculinization. Orally administerd steroid was accumulated in the liver and gall bladder and excrined within 1.5-3 hours after administration. Therefore, the safty as the food was seemed to be quite enough when administered during larval or juvenile stage.
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