笼养雌性黑叶猴尿中性腺激素水平变化与性行为、等级序位的关系

2003年10月30日至2004年11月21日,采集了3只笼养雌性黑叶猴妊娠期和1只笼养雌性黑叶猴发情期的晨尿,并用放射免疫分析法检测尿液中孕酮和雌二醇浓度,同时用全事件观察法观察黑叶猴的行为,分析雌性黑叶猴的行为与其尿中的性腺激素的关系。研究结果发现:1)进入妊娠期,雌性黑叶猴尿中的雌二醇浓度逐渐上升,中后期达高峰;而尿中孕酮浓度在妊娠初期仍维持在放免法的灵敏度以下,妊娠约1个月后才升高至灵敏度以上(13.39ng/mgCr);2)在妊娠中期,雌性黑叶猴仍维持着较高频率的邀配行为,但与雌激素的变化无明显的相关关系;3)发情期,雌猴尿中的雌二醇浓度与其邀配行为呈正相关;4)雌性黑叶猴的性激素高低与其等级序位无关,但序位高的雌猴繁殖较早。

Relationship between the urinary gonadal hormone variation and sexual behavior and social rank in captive female Francois langur ( Trachypithecus francoisi )

From October 2003 to November 2004, early morning urine samples from 4 captiv e Francois langurs (Trachypithecus francoisi)(3 pregnant, 1 in estrus) were coll ected while observations were made of their behaviors, in order to stud y relationships between urinary gonadal hormone levels and sexual behavior. Urinary estradiol and progesterone levels were measured using radioimmunoassay. During pregnancy, estradiol ascended gradually; p rogesterone remained at undectable levels until one month after impregnat ion. During the middle stage of pregnancy, females continued soliciting s exual activity, but these frequent solicitations did not correlate significantly with gonadal hormone level. During estrus, estradio l reached a peak level prior to ovulation and the frequency of sex ual solicitations were positively correlated with estradiol level. Although gonadal hormone level did not correlate significantly (P>0.05) with the social rank of the females, females with higher social rank displayed a tendency of breeding earlier than others.