NOTE Changes in Circulating L-Thyroxine and L-Triiodothyronine of the masu salmon, Oncorhynchus masou accompaning the smoltification, Measured by Radioimmunoassay
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概要
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Serum levels of L-thyroxine (T<SUB>4</SUB>) and L-triiodothyronine (T<SUB>3</SUB>) of the masu salmon, Oncorhynchus masou, were measured by radioimmunoassay during the months from March to September. Serum levels of T<SUB>4</SUB> and T<SUB>3</SUB>varied from0.06to1.44μg and from0.06to0.35μg per100ml serum respectively, although T<SUB>4</SUB>content could not be detected in some specimens.<BR>T<SUB>4</SUB> level showed a seasonal fluctuation in which a higher value was observed in April when parr-smolt transformation was proceeding. T4 level in spring, particularly in April and June, was significantly higher in smolt than in parr.<BR>T<SUB>3</SUB> content showed a small variation during the observed monthsand did not increase at smoltification, although the content tended to decrease to a minimum level in September when T<SUB>4</SUB> level showed also the lowest level.
- 社団法人 日本内分泌学会の論文
著者
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Hirashima Tsuyoshi
Department Of Biology Faculty Of Fisheries Hokkaido University
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SUZUKI MITSUO
Institute of Endocrinology, Gunma University
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Suzuki Shintaro
Institute For Molecular And Cellular Regulation Gunma University
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NISHIKAWA KAZUYOSHI
Department of Biology, Faculty of Fisheries, Hokkaido University
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SUZUKI SHINTARO
Institute of Endocrinology, Gunma University
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- NOTE Changes in Circulating L-Thyroxine and L-Triiodothyronine of the masu salmon, Oncorhynchus masou accompaning the smoltification, Measured by Radioimmunoassay