金头闭壳龟野外生存环境及资源现状调查

为弄清金头闭壳龟野外生存环境及资源现状，2008年7月20日至8月5日，对安徽省南部的黟县、泾县等地进行了调查。调查结果显示：黟县的清溪河和泾县的漕溪河、汀溪河和孤峰河的河流水质清新，未发生富营养化，水化指标范围：pH 5.5～7.0，水温24℃～29℃，DO 6.887～10.421 mg/L，硬度0.42～1.76 mmol/L，总磷0047～3.014 mg/L，亚硝酸盐氮0.009～0.104 mg/L，氨氮0.022～0.043 mg/L，除总磷和氨氮指标外，其他指标均符合Ⅰ或Ⅱ类水质标准；主要分布区域河流的浮游生物量较少，以绿藻门和硅藻门为主，其中绿藻门占浮游植物总属数的35%以上，硅藻门占浮游植物总属数的28%以上，主要分布区域河流底部有大量的螺蛳；2000~2008年，共捕获和销售金头闭壳龟约20只，野外生存量已不足100只。分析认为：金头闭壳龟资源已经处于极度濒危状态，野外生存环境已遭到严重的影响，但原产地的水质及饵料生物条件尚好，需进行连续的资源调查，积极开展人工繁殖，开展资源保护，筹建保护区，拯救这一濒危物种。〖

INVESTIGATION ON THE WILD LIVING ENVIRONMENT AND CURRENT RESOURCES STATUS OF GOLDEN HEADED BOX TURTLE〖

For the sake of finding out the wild living environment features and the current resource status of golden headed box turtle,an investigation was carried out in Yi County,Jing County,etc,which were in the southern Anhui province from July 20th to August 5th,2008.The results showed that the water of Qingxi River of Yi county,Caoxi River,Tingxi River and Gufeng River of Jing county was fresh and clear.These waters had not been eutrophied,with hydrochemical index ranges as follows:5.5~7.0 for pH,24℃~29℃ for water temperature,6.887~10.421 mg/L for DO,0.42~1.76 mmol/L for calcium hardness,0.047~3014 mg/L for total phosphorus,0.009~0.014 mg/L for nitrite nitrogen,0.022~0.043 mg/L for ammonia nitrogen.All of indices could reach the index of Ⅰor Ⅱ class of water，except for the total phosphorous and ammonia nitrogen.The biomass of plankton was very low in these rivers.The phytoplankton was mainly composed with Chlorophyta and Bacillarriophyta,and Chlorophyta accounted for more than 35%,Bacillarriophyta accounted for more than 28%.There were a lot of snails in these rivers，which were also one kind of the foods for the turtle.From 2000 to 2008,about 20 golden headed box turtles were captured and sold in total,and the turtle number in natural environment was not more than 100.The conclusion was that the turtle resource was in the status of critically endangered and the wild living environment had been influenced seriously,but the water quality and food for the turtle were still good.Therefore,we should carry out continual investigation,artificial propagation and protection for the resources,and prepare the construction of conservation area to rescue this endangered species