| Project/Area Number |
60480081
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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 |
畜産学(含草地学)
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| Research Institution | Faculty of Agriculture, Kyushu University |
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Principal Investigator |
KOGA Osamu Faculty of Agriculture, Kyushu University, 農学部, 教授 (80038166)
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| Co-Investigator(Kenkyū-buntansha) |
FUJIHARA Noboru Faculty of Agriculture, Kyushu University, 農学部, 助手 (60150512)
TANAKA Kousaku Faculty of Agriculture, Kyushu University, 農学部, 助教授 (50038220)
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| Project Period (FY) |
1985 – 1987
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| Project Status |
Completed (Fiscal Year 1987)
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| Budget Amount *help |
¥5,700,000 (Direct Cost: ¥5,700,000)
Fiscal Year 1987: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1986: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1985: ¥3,300,000 (Direct Cost: ¥3,300,000)
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| Keywords | Oviposition / Shell gland / Hen / Arginine vasotocine (AVT) / Prostaglandins (PG) / 放卵誘起物質(001F) / 子宮部 / アルギニン・バゾトシン(AVT) / プロスタグランディン(PGs) / 放卵誘起物質(OOIF) / 卵管 / 卵殻腺部 |
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| Research Abstract |
Arginine vasotocine (AVT), prostaglandins (PG) and ovarian oviposition inducing factor (OOIF) has been considered to be involved in the regulation of oviposition in the laying hen. The release mechanism and physiological role of these matters, however, remain to be resolve. The purpose of this study was to explore the mechanism of the regulation of oviposition in the hen through the examination of spontaneous and induced oviposition.
The results obtained were summarized as follows;
(1). Plasma concentration of AVT during spontaneous oviposition increased drastically, followed by the decline to basal level after 5 minutes. Intrauterine administration of PG and arachidonic acid induced premature oviposition, being associated with a marked increase in plasma AVT level.
(2). PG concentration in the uterine tissue changed slightly immediately after spontaneous oviposition. When premature oviposition was induced by intrauterine injection of AVT, PG level in the shell gland tissue was fluctuated but not significantly.
(3). Purifiec OOIF was shown to be small in a molecular weight and acidic in chemical nature. Injection of OOIF into the hen lead to premature oviposition, during which AVT concentration in peripheral plasma was elevated noticeably, but not for PG in plasma.
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