Wild Populations of the Chinese alligator approach extinction |
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Authors: | John Thorbjarnarson Xiaoming WangShao Ming Lijun HeYouzhong Ding Yuelong WuScott T McMurry |
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Institution: | a Wildlife Conservation Society, 2300 Southern Blvd, Bronx, NY 10460 USAb Department of Biology, East China Normal University, 3663 Zhong Shan Road, Shanghai 200062, Chinac Anhui Research Center of Chinese Alligator Reproduction, Xuanzhou, Anhui 242034, Chinad Anhui Forestry Bureau, 47 Wuwei Road, Heifei, Anhui 230001, Chinae The Institute of Environmental and Human Health, Reese Center, Texas Tech University, 1207 Gilbert Drive, Lubbock, TX 79416, USA |
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Abstract: | The Chinese alligator, Alligator sinensis, is on the verge of becoming extinct in the wild as a result of loss of natural wetlands in the lower Changjiang valley. Chinese alligators are only known from a small region in southeastern Anhui province, a fraction of its former distribution. Within this area, a 433 km2 reserve has been declared that contains 13 designated habitat sites totaling 41 ha. The sites consist of small ponds located within or adjacent to villages, are completely surrounded by rice fields, or are biologically marginal oligotrophic ponds set in low hills. Alligators are only present at 10 of the 13 designated sites, with the largest groups containing a maximum of 10-11 animals and one adult female. In recent years nesting is known from only four areas, but the eggs are routinely collected and hatchlings retained in the Anhui alligator breeding center. The total population of wild Chinese alligators is probably <130 and is declining at an annual rate of 4-6%. If present trends continue, the Chinese alligator will be the first species of crocodilian to become extinct in the wild in historical times. Conservation efforts need to focus on protection of remaining wetlands and wetland restoration, and the inclusion of Chinese alligators in the active management of protected wetlands sites throughout the species' historic distribution. |
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Keywords: | Chinese alligator Conservation Status Extinction China Alligator sinensis |
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