H
Hirohiko Kagawa
Researcher at University of Miyazaki
Publications - 96
Citations - 3992
Hirohiko Kagawa is an academic researcher from University of Miyazaki. The author has contributed to research in topics: Japanese eel & Pagrus major. The author has an hindex of 36, co-authored 96 publications receiving 3786 citations. Previous affiliations of Hirohiko Kagawa include University of Tokyo.
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The first production of glass eel in captivity: fish reproductive physiology facilitates great progress in aquaculture
TL;DR: Artificial fertilization performed immediately after ovulation with pre-diluted and stocked milt consistently resulted in the production of high-quality gametes and potassium ions were revealed to be an essential constituent for the maintenance of motility in the eel spermatozoa.
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Changes in fertilization and hatching rates with time after ovulation induced by 17, 20β-dihydroxy-4-pregnen-3-one in the Japanese eel, Anguilla japonica
TL;DR: The results indicate that ovulation induced by DHP treatment occurs after a short but well-defined period of time, and that artificial fertilization must be carried out immediately after ovulation in order to obtain good quality eggs.
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Gonadotropic control of ovarian follicle maturation: the two-stage concept and its mechanisms.
TL;DR: The term, ovarian follicle (or oocyte) maturation be used for teleosts without qualifiers such as 'final' to define the first and second stages of follicular maturation.
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Insulin and Insulin-like Growth Factors I and II Induce Final Maturation of Oocytes of Red Seabream, Pagrus major, in Vitro
TL;DR: IGF-I appears to act directly on oocytes, and not via maturation-inducing hormone production, to induce GVBD, suggesting, for the first time in teleost, that growth factors, such as IGF-I, are involved in the induction of GV BD of oocytes.
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Effects of Luteinizing Hormone and Follicle-Stimulating Hormone and Insulin-Like Growth Factor-I on Aromatase Activity and P450 Aromatase Gene Expression in the Ovarian Follicles of Red Seabream, Pagrus major
TL;DR: It is indicated that LH, but not FSH, stimulates estradiol-17β production in the ovarian follicle of red seabream through stimulation of aromatase activity and P450arom gene expression and IGF-I enhances the LH-stimulated P450ars gene expression.