Abstract: Fecal testosterones were analysed from four male red pandas ( Ailurus fulgens) in Chengdu Zoo and Chengdu Research Base of Giant Panda Breeding by radioimmunoassays from December 1999 to September 2000 , to investigate the hormonal correlations to reproduction and reproductive behaviors. The results indicated that fecal testosterone concentration was obviously higher ( P< 0.01) in reproductive season (from December 1999 to March 2000) than in non-reproductive season (from April to September 2000) , and the fecal testosterone levels were closely correlated with reproductive aggression. In non2reproductive season , the reproductive behaviors such as scent marking, licking anogenital , licking marking , and bleating seldom happened when fecal testosterone concentration stayed in a relatively low at basal level. However, in reproductive season, these reproductive behaviors happened frequently when fecal testosterone level rose obviously. These imply that testosterone is the main physiological factor , which regulates seasonal changes of male red pandas’reproductive activities.
　

Key words: Male red panda (Ailurus fulgens), Feces, Testosterone, Reproductive behavior

摘要： 1999 年12 月至2000 年9 月, 使用放射免疫分析法, 测定了成都动物园和成都大熊猫繁育研究基地的4 只雄性小熊猫粪样中睾酮水平变化情况, 同时对其行为进行了观察。研究结果表明, 雄性粪样中睾酮水平在繁殖期(12 月～3 月) 显著高于非繁殖期(4 月～9 月) (P < 0.01) , 且睾酮水平变化与繁殖行为密切相关。在非繁殖期,雄性小熊猫的睾酮水平处于基础的较低水平时, 其繁殖行为如蹭阴、舔阴、舔标记物和咩叫等几乎没有发生或很少发生; 而在繁殖期, 雄性小熊猫的睾酮水平明显升高, 这些繁殖行为频繁发生。以上结果说明, 睾酮是调节雄性小熊猫繁殖行为季节性变化的生理因子。

关键词: 雄性小熊猫, 粪便, 睾酮, 繁殖行为