人工养殖扬子鳄野放初期的活动观察

2003年4月27日，将经过兽医检查挑选出来的两雌一雄人工养殖的健康成年扬子鳄(Alligator sinensis)释放到安徽宣城红星扬子鳄保护点，利用无线电遥测技术测定其释放初期4周内的活动区域，共记录372个位点；还通过白天望远镜观察和夜间灯光计数法观察了它们的活动情况。结果显示：3条扬子鳄经过3-14d后处于不同的稳定区域内，具领域特征；雄性个体的活动区域大于雌性，日活动区域面积的变化也大于雌性；局部环境选择上均趋向靠近岸边并具有茂密植被的区域。

Observation of Activity in Chinese Alligators Released During an Early Period at Hongxing of Anhui

Two female and one male healthy adult Chinese alligators (Alligator sinensis) from Anhui Research Center for Chinese Alligator Reproduction were chosen by the veterinarian's examination,and released with collars at Hongxing reservoir of Xuanzhou in Anhui Province on April 27th,2003.Radio telemetry,direct observation by binoculars in daytime and spotlight night counting in night-time were used to find out their activity area and movement pattern,and totally 372 movement points for them were recorded during an early period of four weeks.The results show that each individual has its own steady activity area after 3 to 14 days released;the male has a relative larger activity area and a larger change of daily movement area than those of the females;they are apt to choose the bank edge with good condition of vegetation coverage for live.The alligators released conflict with native ones in the reservoir occasionally,showing territory characteristics of this species.