2013 Fiscal Year Final Research Report
Study on fish osmoregulation and its application
| Project/Area Number |
22248021
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
General fisheries
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| Research Institution | The University of Tokyo |
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Principal Investigator |
KANEKO TOYOJI 東京大学, 農学生命科学研究科, 教授 (70221190)
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| Co-Investigator(Renkei-kenkyūsha) |
LEE Kyung Mi 東京大学, 農学生命科学研究科, 特任研究員 (30507885)
WATANABE Soichi 東京大学, 農学生命科学研究科, 助教 (20507884)
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| Project Period (FY) |
2010-04-01 – 2014-03-31
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| Keywords | 浸透圧調節 / ティラピア / 塩類細胞 / カリウム / セシウム / 温泉トラフグ / アミノ酸輸送体 / イオン輸送体 |
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| Research Abstract |
In the present study, we aimed to clarify molecular and cellular mechanisms of fish osmoregulation, and seek a possibility to apply fish osmoregulatory studies to fisheries industry. First, we clarified the functional plasticity and life cycle of gill ionocytes in tilapia. Second, gill ionocytes were demonstrated to excrete potassium, and the molecular mechanism of potassium excretion was shown in tilapia. Cesium was also secreted from gill ionocytes through the potassium-excreting mechanism. Finally, the involvement of free amino acids in intracellular osmoregulation was shown in tilapia and puffer fish. It is highly possible that temporal exposure of fish to higher salinity water causes a transient increase in intracellular amino acid concentration, resulting in a transient increase in fish meat taste.
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Research Products
(27 results)
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[Journal Article] NKCC2β and NCCβ expressed in the intestine and rectum, respectively, in Japanese eel Anguilla japonica2011
Author(s)
Watanabe, S., Mekuchi, M., Ideuchi, H., Kim, Y. K., and Kaneko, T.
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Journal Title
Comp. Biochem. Physiol
Volume: A 159
Pages: 427-435
DOI
Peer Reviewed
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