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。
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 .
