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野生扬子鳄种群及栖息地现状研究
引用本文:丁由中,王小明,何利军,邵民,谢万树,McMurry T Scott. 野生扬子鳄种群及栖息地现状研究[J]. 生物多样性, 2001, 9(2): 102-108
作者姓名:丁由中  王小明  何利军  邵民  谢万树  McMurry T Scott
作者单位:1. 华东师范大学生物学系,
2. 安徽扬子鳄繁殖研究中心,
3. The Wildlife Conservation Society,
4. Texas Tech University Health Sciences Center,
基金项目:本课题受上海市曙光计划基金资助,野外工作受国际野生生物保护协会(TheWildife Conservation Society)部分资助。
摘    要:1999年7~8月及2000年8~9月,利用GPS、激光测距仪等,采用夜间灯光照射计数方法,对 有野生扬子鳄(Alligator sinensis)存在的安徽省宣州、泾县、广德、郎溪、南陵等5 县市的26个地点进行了调查,包括扬子鳄国家级自然保护区的13个指定保护点。结果发现: 目前野生扬子鳄主要生存在第一类栖息地(1999年50.7%、2000年40.0%),面积为17.38 hm2;其他两类栖息地的野生扬子鳄分布比率较小(各为1999年24.0%、2000年30.9%、1999 年25.3% 、2000年29.1%),面积分别为22.04hm2、19.03hm2。两年的平均生态密度分别为1.28条/hm2和1.79条/hm2,野生扬子鳄种群数量为145条。其种群已明显分为至少18个数 量不等且相互隔离的地方种群。建议恢复足够大的栖息地,并放饲养鳄于其中以重新 建立有效野生种群。

关 键 词:野生扬子鳄  种群数量  栖息地
文章编号:1005-0094(2001)02-0102-07
收稿时间:2001-01-08
修稿时间:2001-03-26

Study on the currentpopulation and habitat of the wild Chinese alligator (Alligator sinensis)
Ding You-zhong,WANG Xiao-Ming,HE Li-jun,SHAO Min,XIE Wan-Shu,Thorbjarnarson B John,McMurry T Scott. Study on the currentpopulation and habitat of the wild Chinese alligator (Alligator sinensis)[J]. Biodiversity Science, 2001, 9(2): 102-108
Authors:Ding You-zhong  WANG Xiao-Ming  HE Li-jun  SHAO Min  XIE Wan-Shu  Thorbjarnarson B John  McMurry T Scott
Affiliation:DING You Zhong 1,WANG Xiao Ming 1,HE Li Jun 1,SHAO Min 2,XIE Wan Shu 2,Thorbjarnarson B John 3,McMurry T Scott 4 1 The Department of Biology,East China Normal University,Shanghai 200062 2 Anhui Research Center for Chinese Alligator R
Abstract:A survey of wild Chinese Alligator was conducted from July to August 1999 and from August to September 2000 by direct counting after dark (2000pm) using headlamps or a 12v portable spotlight. At each site visited, the authors mapped the ponds using laser rangefinder and compass, characterized the physical nature of the ponds and vegetation, and conducted interviews with local residents. The location of all sites was recorded using a hand-held GPS. There are 26 sites in 5 counties that were surveyed where wild Chinese Alligators still exist in Anhui province, including 13 designated conservation sites of the National Chinese Alligator Reserve. The current wild alligator populations mainly exist in the best type of habitat, which totals 17.4 ha with estimated populations of 50.7% in 1999 and 40.0% in 2000. This can be compared with the other two types of habitat, which total 22.0 ha and 19.0 ha, with their estimated population numbers of 24.0% in 1999 and 30.9% in 2000, and 25.3% in 1999 and 29.1% in 2000 respectively. The average ecological densities of the alligators in the two years were 1.3 ind./ha and 1.8 ind./ha, with an estimated population of 145 individuals. However, the population has been evidently divided into 18 isolated small local populations with different numbers of individuals. We suggest that habitat should be restored and captive-reared alligators should be reintroduced into the area to rebuild a viable population.
Keywords:wild Chinese Alligator ( Alligator sinensis )   population   habitat
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