中文摘要：

高原鼠兔种群数量过多被认为是青藏高原草地退化的主要原因之一。2007年4月,在青海省果洛州大武镇开展了高原鼠兔不育控制实验。为了解3种不育剂（炔雌醚、左炔诺孕酮和EP-1）对高原鼠兔和土著鸟类的影响,分别在2007年和2008年8-9月调查了高原鼠兔种群数量与鸟类多样性。结果表明,投药次年,炔雌醚能显著降低高原鼠兔各群数量,而对鸟类多样性和物种数均无显著影响;炔雌醚组白斑翅雪雀的数量显著低于对照组,棕颈雪雀的数量显著高于EP-1组。因此,炔雌醚能有效降低高原鼠兔种群数量,对土著鸟类多样性影响较小。使用炔雌醚开展不育控制是高原鼠兔种群管理的一种新途径。

英文摘要：

An overabundance of plateau pika（ Ochotona curzoniae） populations along with increased numbers of livestock was suspected to have caused degradation of the alpine meadow on the Tibetan Plateau. In April 2007,we conducted fertility control of plateau pika populations in Guoluo District,south of Qinghai Province,China. We investigated abundances of pika and bird species observed at the study sites during August and September 2007 and 2008 in order to evaluate the effects of quinestrol,levonorgestrel and EP- 1 on plateau pikas,avian diversity and abundance. The results demonstrated that quinestrol reduced pika abundances significantly compared with control in the second year after delivering the baits,while bird diversity and species richness did not decline significantly. Abundances of white-rumped snowfinch were significantly lower in quinestrol group compared with control,while abundances of rufous-necked snowfinch were significantly higher in quinestrol groups compared with EP- 1 group. Quinestrol reduced pika population abundances,but had limited effects on avian diversity. Therefore,it was a potential approach that could be applied in the management of plateau pika on the Tibetan Plateau.