小熊猫妊娠期粪便中孕酮、雌二醇的水平变化

2000年3—8月在成都动物园和成都大熊猫繁育研究基地，用放射免疫分析法测定了6只雌性小熊猫粪样中孕酮（P）和雌二醇（E2）的水平变化，同时对其繁殖行为进行了观察。研究结果表明，交配后的雌体粪样中E2浓度下降至基础水平，P浓度在30d后上升至150ng／g以上；怀孕雌体在妊娠期粪样中P水平在200ng／g以上，P峰值可以达500ng／g以上；假妊娠者粪样中P水平一般不超过150ng／g，P峰值在200ng／g以下；雌体产前半个月孕酮迅速下降，E2缓慢上升，产后P保持在基础水平。这意味着可通过测定粪便中P水平进行早孕诊断、产期预测和真假妊娠判断。根据行为观察和粪样激素分析可知，雌兽妊娠期为123—128d（X=124，N=5），产仔率为1．8／胎（N=5）。

Fecal Progesterone and Estradioi Levels during Gestation and the Correlation to Parturition in Female Red Pandas (Ailurus fulgens)

This paper analyzed with the method of radioimmunoassays the fecal estradiol (E2) and progesterone (P) concentrations and investigated the mating activity of six female red pandas (Ailurus fulgens) in Chengdu Zoo and Chengdu Research Base of Giant Panda from March to August 2000. The findings indicate that fecal E2 concentration of fertilized females declined to a basal level and fecal P concentration rose to 150 ng/g after 30 days of pregnancy. During pregnancy, fecal P concentration was more than 200 ng/g and the peak of P concentration reaches over more than 500 ng/g. Fecal P concentration of pseudo-pregnant female is normally no more than 150 ng/g and the peak of P concentration is below 200 ng/g. Fecal P concentration of the females decreases quickly half a month before bearing and maintains a basal level after parturition, while E2 increases slowly. The investigation and analysis show that the early diagnoses of pregnancy and pseudo-pregnancy,as well as forecasting of parturition,can be made by measuring the P and E2 concentrations in female red panda feces. Based on the behavioral observations and fecal steroid analysis, we have also found that the gestation period of red pandas is 123-128 days (=124, N=5) and the bearing rate is 1.8/fetus (n=5).