关键词: 中国大鲵, 种群分布, 种群资源, 历史动态, 岩下保护区

Abstract:

To ascertain the quantity,habitat distribution and population dynamic of Chinese giant salamander (Andrias davidianus),a random sampling survey and native visit on wild population resources and its dynamics were conducted in Yanxia Natural Reserves of Guizhou province,China,in June of 2006,August and October of 2007.The results show that contribution of wild giant salamanders manly concentrates in a small region where is a water network consisted of underground water area and surface aquatic system.In terms of temporal dynamic of population,the quantity decreased sharply in 80s and trended to stable after the middle of 90s in last century.Due to habitat loss or human’s disturb,there were few places in surface aquatic system suiting giant salamander and the range of habitat has dwindled into underground water area.A great quantity of young giant salamanders (hatched at Sept.or Oct.annually) in breeding cavern Longdong streamed out with water from Xiyejing in annual winter,which maybe relate with water temperature,period of growth or population density.According to the breeding characteristics of giant salamander recorded from other researches and quantities streamed from breeding cavern,it was calculated that the population density was about 0085 kg/m2 and the gross of resource was 1 700 kg.Because of exterior endangered factors,the habitats and quantity of giant salamanders have been suffering destruction and decline,so it is very urgent to enhance the conservation and management of resources.

Key words: Andrias davidianus, distribution of population, resources of wild population, history dynamic of quantity, Yanxia Nature Reserve