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 we...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).展开更多
Influence of temperature on egg incubation of the wild Chinese alligator was studied during the summer seasons of 1999 and 2000(July to October and August to September,respectively)at three observation sites, Zhuangto...Influence of temperature on egg incubation of the wild Chinese alligator was studied during the summer seasons of 1999 and 2000(July to October and August to September,respectively)at three observation sites, Zhuangtou of Xuanzhou County,Shuangkeng and Zhongqiao of Jingxian county, Anhui Province. One nest at each of the above sites was monitored, bearing 19,17 and 19 eggs,respectively. According to the width of the band on the eggs, we estimated the dates that the eggs were laid. We recorded both the nest temperature and atmosphere temperature with an automated temperature data logger (HOBO Temp) during the whole observation period.We found that the average nest temperature maintained around 25 26℃ during incubation throughout day and night,within over two thirds of time in each day the nest temperature being higher than the atmosphere temperature. Analysis of our data revealed that alligator nests have buffering effect on the inside temperature. Higher nest temperature (27 30℃)increased the hatching rate. It was also noticed that the hatching rate varied considerably from site to site(between 0 100%). We conclude that climate is an important factor influencing egg hatching in the wild, and prolonged rainy season which caused large temperature fluctuation can decrease the hatching rate of the alligator eggs.展开更多
文摘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).
文摘Influence of temperature on egg incubation of the wild Chinese alligator was studied during the summer seasons of 1999 and 2000(July to October and August to September,respectively)at three observation sites, Zhuangtou of Xuanzhou County,Shuangkeng and Zhongqiao of Jingxian county, Anhui Province. One nest at each of the above sites was monitored, bearing 19,17 and 19 eggs,respectively. According to the width of the band on the eggs, we estimated the dates that the eggs were laid. We recorded both the nest temperature and atmosphere temperature with an automated temperature data logger (HOBO Temp) during the whole observation period.We found that the average nest temperature maintained around 25 26℃ during incubation throughout day and night,within over two thirds of time in each day the nest temperature being higher than the atmosphere temperature. Analysis of our data revealed that alligator nests have buffering effect on the inside temperature. Higher nest temperature (27 30℃)increased the hatching rate. It was also noticed that the hatching rate varied considerably from site to site(between 0 100%). We conclude that climate is an important factor influencing egg hatching in the wild, and prolonged rainy season which caused large temperature fluctuation can decrease the hatching rate of the alligator eggs.
