Gazola R, Borella M I
Escola de Farmácia e Odontologia de Alfenas, Alfenas, MG, Brasil.
Braz J Med Biol Res. 1997 Dec;30(12):1485-7. doi: 10.1590/s0100-879x1997001200017.
The levels of testosterone (T) and 11-ketotestosterone (11-KT) of the South American pacu Piaractus mesopotamicus were determined by radioimmunoassay during two stages of the reproductive cycle, i.e., resting and maturation, and the gonadosomatic index (GSI) was calculated. The highest levels of T and 11-KT were reached during the maturation stage (T = 2400 +/- 56 pg/ml; 11-KT = 2300 +/- 60 pg/ml) and lower levels were maintained during the resting period. The rise in androgen levels occurred with the appearance of spermatozoa in the maturation stage, when GSI was highest.
通过放射免疫分析法测定了南美脂鲤（Piaractus mesopotamicus）在生殖周期的两个阶段，即静止期和成熟期的睾酮（T）和11-酮睾酮（11-KT）水平，并计算了性腺指数（GSI）。在成熟期达到了最高的T和11-KT水平（T = 2400 +/- 56 pg/ml；11-KT = 2300 +/- 60 pg/ml），而在静止期维持较低水平。雄激素水平的升高与成熟期精子出现时性腺指数最高的情况同时发生。
