Nishikawa K, Hirashima T, Suzuki S, Suzuki M
Endocrinol Jpn. 1979 Dec;26(6):731-5. doi: 10.1507/endocrj1954.26.731.
Serum levels of L-thyroxine (T4) and L-triiodothyronine (T3) of the masu salmon, Oncorhynchus masou, were measured by radioimmunoassay during the months from March to September. Serum levels of T4 and T3 varied from 0.06 to 1.44 microgram and from 0.06 to 0.35 microgram per 100 ml serum respectively, although T4 content could not be detected in some specimens. T4 levels 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. T3 content showed a small variation during the observed months and did not increase at smoltification, although the content tended to decrease to a minimum level in September when T4 level showed also the lowest level.
在3月至9月期间，通过放射免疫分析法测定了马苏大麻哈鱼（Oncorhynchus masou）血清中的L-甲状腺素（T4）和L-三碘甲状腺原氨酸（T3）水平。血清中T4和T3的水平分别为每100毫升血清0.06至1.44微克和0.06至0.35微克，不过在一些样本中未检测到T4含量。T4水平呈现季节性波动，在4月幼鱼向稚鱼转变过程中观察到较高值。春季，尤其是4月和6月，稚鱼的T4水平显著高于幼鱼。T3含量在观察月份中变化较小，在稚鱼化时并未增加，尽管其含量在9月倾向于降至最低水平，此时T4水平也处于最低。
