大熊猫乳中酶的活力与激素含量分析

测定了两只大熊猫乳中几种酶的活力和激素浓度,并与成都麻羊和中国荷斯坦牛乳进行了比较。脱脂乳中γ-谷氨酰转肽酶、乳过氧化物酶活力明显低于牛乳,而淀粉酶活力高于牛乳,N-乙酰-β-D氨基葡萄糖苷酶活力与牛乳接近;两只大熊猫乳中均检测到较高浓度的胰岛素和生长激素,胰岛素含量明显高于牛乳,T3和IGF-I含量显著低于成都麻羊乳。     

雌性川金丝猴的邀配行为与尿液雌二醇水平的关系

2001年10～12月及2002年9月～11月,我们对上海野生动物园一群半散养条件下的川金丝猴进行了研究,记录了群体内的4只成年雌猴的邀配行为,同时收集了观察对象的晨尿,利用放射免疫法测定其中的雌二醇含量。结果显示,在未受孕的月经周期内,雌猴的邀配行为集中在雌二醇高峰前后,雌猴在卵泡期和黄体期邀配频次显著下降,说明邀配行为受雌二醇水平的调控。同一群体内不同个体的月经周期并不同步,邀配高峰互不重叠,这可能是雌猴避免相互竞争产生的结果。利用雌二醇测定结果推断受孕日期,发现进入妊娠期后雌猴仍然频繁地向雄猴邀配,并得到雄猴的响应。妊娠期内的雌二醇水平虽有波动,但都高于月经周期内排卵前的雌二醇高峰,邀配频次与雌二醇水平没有明显的相关性,因此这一时期的邀配行为不能归结为激素作用的结果,它们应该具有其它社会功能[动物学报49(6)：736～741,2003]。     

利用尿液中的雌二醇、孕酮含量监测雌性川金丝猴的月经周期和妊娠

During two consecutive mating seasons from August 2001 to December 2002, we observed the sexual behavior of Sichuan golden monkeys in the Chengdu Zoo and the Shanghai Wild Animal Park. We collected urine samples from females in the early morning. We also measured urinary estradiol and progesterone levels using radioimmunoassay. Based on the estradiol concentration during the menstrual cycle, we discovered that the length of the menstrual cycle was 286.33 1.67 days. The length of pregnancy was about 200 days. The level of estradiol after impregnation was significantly different with the level during the ,same period in the non-receptive part of the cycle. Thus we could diagnose early pregnancy in female Sichuan golden monkeys by checking their urinary estradiol level .