Vitellogenin Production Induced by Eyestalk Ablation in Juvenile Giant Freshwater Prawn Macrobrachium rosenbergii and Trial Methyl Farnesoate Administration
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概要
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Juvenile Macrobrachium rosenbergii were bilaterally eyestalk-ablated and hemolymph-sampled at 3 to 6 day-intervals for three weeks. In males, vitellogenin appeared several days after ablation, increased slightly for 1-2 weeks, and then decreased. Quantification by enzyme immunoassay indicated peak vitellogenin levels ranging from 0. 1 to 0. 8 mg/ml. Females showed a similar profile , but peak levels ranged from 0. 5 to 3. 0 mg/ml ; one individual was however exceptional with titers reaching nearly 30 mg/ml. Vitellogenin was not detectable in non-ablated animals. Juvenile male and female vitellogenin was shown by SDS-PAGE/Western blotting to consist of a single polypeptide component of 199K ; however, in the exceptional female only, vitellogenin was composed of three polypeptides of 199, 102 and 90K as in adult female vitellogenin. Nevertheless, all ablated juvenile females exhibited increased gonadosomatic index and vitellogenic oocytes, as demonstrated by immunocytochemical techniques. Subsequently, juvenile males were employed to examine the effects of methyl farnesoate (MF) administration on vitellogenin production. In ablated animals, no significant differences in vitellogenin production were observed between the MF-injected and saline-injected groups. MF administration could not induce vitellogenin production in non-ablated animals. The physiological significance of the appearance of vitellogenin in juveniles of both sexes in context of the above results is discussed.
- 社団法人日本動物学会の論文
- 1994-02-15
著者
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SUZUKI Yuzuru
Department of Aquatic Bioscience, Graduate School of Agricultural and Life Science, University of To
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Aida Katsumi
Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University
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Okumura Takuji
National Research Institute of Aquaculture, Fisheries Research Agency
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Wilder Marcy
Department Of Fisheries Faculty Of Agriculture The University Of Tokyo
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Aida Katsumi
Department Of Aquatic Bioscience Graduate School Of Agricultural And Life Sciences The University Of
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Aida Katsumi
Department Of Fisheries Faculty Of Agriculture The University Of Tokyo
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Okumura T
National Res. Inst. Aquaculture Mie
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Okumura T
National Research Institute Of Aquaculture Fisheries Research Agency
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OKUMURA TAKUJI
Department of Fisheries, Faculty of Agriculture, The University of Tokyo
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FUSETANI Nobuhiro
Department of Fisheries, Faculty of Agriculture, The University of Tokyo
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Okumura Takuji
Department Of Aquatic Bioscience Graduate School Of Agricultural And Life Sciences The University Of
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Fusetani Nobuhiro
Department Of Aquatic Bioscience Graduate School Of Agricultural And Life Sciences University Of Tok
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Fusetani Nobuhiro
Department Of Fisheries Faculty Of Agriculture The University Of Tokyo
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Wilder N.
Department of Fisheries, Faculty of Agriculture, The University of Tokyo
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Suzuki Yuzuru
Department Of Aquatic Bioscience Graduate School Of Agricultural And Life Sciences The University Of
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Suzuki Yuzuru
Department Of Fisheries Faculty Of Agriculture The University Of Tokyo
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Suzuki Yuzuru
Department Of Applied Biochemistry Kyoto Prefectural University
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Wilder N.
Department Of Fisheries Faculty Of Agriculture The University Of Tokyo
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Suzuki Yuzuru
Department Of Agricultural Chemistry Kyoto Prefectural University
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