发帖
雷达卡
英文文献：Anthropogenic And Natural Determinants Of The Population Of A Sensitive Species: Sage Grouse In Nevada-一个敏感物种的人口的人为和自然决定因素:在内华达州的鼠尾草松鸡
英文文献作者：van Kooten, G. Cornelis,Eagle, Alison J.,Eiswerth, Mark E.,Feng, Hui
英文文献摘要：
This paper uses Nevada data to conduct regression analyses of the relationship between sage grouse (Centrocercus urophasianus) population sizes and potential causal factors. This is policy-relevant because of current petitions for listing this species under the Endangered Species Act. A key feature is that, although monitoring of sage grouse has occurred for many decades, data collection methods and level of monitoring effort have not been consistent. To account for this feature we use, as dependent variables, standardized measures such as population counts and harvest (hunting success) per unit of effort. Preliminary findings suggest that such measures have been particularly sensitive to whether or not humans used strychnine for predator control, with normalized measures of grouse populations higher in years when strychnine was employed. Our results also suggest a positive association between the number of cattle on the range and normalized measures of grouse population. This is a controversial finding as some studies suggest a negative impact of cattle grazing on grouse. Our data do not include indications of the timing and precise nature of grazing practices and so should be interpreted with caution.
本文利用内华达数据对鼠尾草种群大小与潜在因果因素之间的关系进行回归分析。这是与政策相关的，因为目前有请愿将该物种列入濒危物种法案。一个关键的特点是，虽然鼠尾草的监测已经进行了几十年，但数据收集方法和监测工作的水平并不一致。为了解释这一特性，我们使用标准化的度量方法作为因变量，例如每单位努力的种群计数和收获(捕猎成功)。初步研究结果表明，这些措施对人类是否使用士的宁来控制捕食者特别敏感，因为在使用士的宁的年份，规范化的松鸡数量会更高。我们的结果还表明，放牧范围内的牛的数量与松鸡种群的标准化措施之间存在正相关关系。这是一个有争议的发现，因为一些研究表明放牧对松鸡的负面影响。我们的数据不包括放牧活动的时间和精确性质，因此应该谨慎解释。
京公网安备 11010802022788号
