【摘要】 用放射免疫测定法测定了４４ 条不同性别黄鳝（Ｍｏｎｏｐｔｅｒｕｓ ａｌｂｕｓ Ｚｕｉｅｗ ）血清总甲状腺激素Ｔｈｙｒｏｘｉｎｅ Ｔ３，Ｔｒｉｉｏｄｏｔｈｙｒｏｎｉｎｅ Ｔ４）含量。结果表明：（１）５～９ 月雄性Ｔ３ 含量一直较高；雌性５～６ 月Ｔ３含量比雄性和兼性低，７ 月以后升至与兼性持平，８～９ 月达到与雄性持平，高于兼性含量，升幅较大，但差异不显著（Ｐ＞ ０．０５）。（２）５～６ 月雄性Ｔ４ 含量稍高于其它性别，７ 月以后有所降低；雌性与兼性 Ｔ４ 含量与变化趋势基本相同。（３）同性别Ｔ４ 含量比Ｔ３ 含量要低得多。甲状腺激素可能与性逆转关系不大，其作用在于促进代谢与生长。更多还原

【Abstract】 The serum samples from forty four ricefield eel ( Monopterus albus Zuiew) were detected and analysed for total thyroxine (triiodothyronine T 3 and thyroxine T 4)concentrations by radioimmuno assay procedures.The result indicates that:(1)serums T 3 was higher in males than the other two sorts of sexes from May to September;but it was lower in females than in males and intersexes from May to June.This condition went on to July,and after that,serums T 3 were equal concentrations with that in intersexes,then up to equality with that in males from August to September.Though T 3 concentrations rose with a big extent ,there was no significant difference in males,females and intersexes ( P >0.05).(2)Serums T 4 were a little higher in males than in the other two sorts of sexes from May to June,but it lowered after July;The concentration change and trend of T 4 were similar in females and intersexes during this stage (3)The concentrations of T 4 were much lower than that of T 3 for the same sex.In brief,the serum thyroid hormones in ricefield eel are scarce in relation to sex reversal,but the hormones affect and stimulate its metabolism and growth.更多还原