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.

• 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。