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 .
From March to April,1998,the authors studied the time budget and behaviour patterns of Cervus albirostris in Shanghai Wild Animal Park.We analyzed the results from 23 days′observation for different sex and weather were analyzed. Cervus albirostris spent about 50% daytime in resting,and 40% daytime in feeding.Resting behaviour was presented from 8∶00 to 17∶00 .The female spent more resting time than the male(p<0.05)in fine days.The female spent less standing time than the male in rainy days(p<0.01). Cervus albirostris spent more standing time in fine days than in rainy days(p< 0.05 for the male,p<0.01 for the female).
