SAMPLING IN AERIAL SURVEY
SAMPLING IN AERIAL SURVEY
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DOI：
10.2307/3799980
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发表时间：
1977-01-01
影响因子：
2.3
通讯作者：
CAUGHLEY, G
中科院分区：
文献类型：
--
作者：
CAUGHLEY, G
首先从统计效率方面比较了适用于[大型动物]航空调查的抽样程序，然后根据其操作实用性进行了比较。没有替换的采样比有替换的采样更精确，但它需要一个在实践中往往无法达到的导航标准。系统抽样可能会导致有偏见的标准误差，但在绘制动物分布图时，必须权衡其实际优势。零碎的整群抽样返回无偏估计，但群内单位(横断面)之间的自相关会使标准误差产生偏差。除特殊情况外，样带抽样比样方抽样效率更高。
Sampling procedures appropriate to aerial survey [of large animals] were compared firstly in terms of the statistical efficiency and secondly according to their operational practicality. Sampling without replacement is more precise than sampling with replacement, but it requires a standard of navigation often impossible to achieve in practice. Systematic sampling can lead to biased standard errors but that must be weighed against its practical advantages when animal distributions are mapped. Fragmented cluster sampling returns unbiased estimates but autocorrelation between units within clusters (transects) biases the standard errors. Except in special circumstances, transect sampling is more efficient than quadrat sampling.