Cost‐benefit analysis of acoustic recorders as a solution to sampling challenges experienced monitoring cryptic species
Cost‐benefit analysis of acoustic recorders as a solution to sampling challenges experienced monitoring cryptic species
复制标题
声学记录仪的成本效益分析作为解决加密物种监测中采样挑战的解决方案
作者：
Emma M. Williams;C. O'donnell;D. Armstrong
摘要从任何研究中得出的结论都受到抽样设计质量的限制。不幸的是，当监测难以检测的物种（神秘）时，抽样设计变得取决于可行性而不是期望。我们对四种声学记录仪选项进行了校准和成本效益分析，这些选项被认为是监测澳大利亚盐卤（一种神秘的湿地鸟类）时遇到的几种采样限制的潜在解决方案。在监测许多不同的濒危物种，特别是那些神秘的物种时，通常会遇到这种取样限制。录音机选项包括单声道和立体声设备，有两个声音文件处理选项（视觉和听觉分析）。记录设备提供的呼叫计数数据类似于现场观察员收集的数据，但成本只有现场观察员的一小部分，这意味着以前被认为过于昂贵的“理想主义”采样制度对于比特率来说变得可行。我们的研究是为数不多的在数据质量的背景下评估记录设备的货币价值的研究之一，允许在监测神秘濒危物种时经常遇到的权衡（和潜在的解决方案）被更清楚地显示和比较。以这种方式克服监测神秘物种的挑战的能力增加了数据缺乏物种的研究可能性，并且适用于具有类似监测挑战的任何物种。
Abstract The inferences that can be made from any study are limited by the quality of the sampling design. By bad luck, when monitoring species that are difficult to detect (cryptic), sampling designs become dictated by what is feasible rather than what is desired. We calibrated and conducted a cost‐benefit analysis of four acoustic recorder options that were being considered as potential solutions to several sampling restrictions experienced while monitoring the Australasian bittern, a cryptic wetland bird. Such sampling restrictions are commonly experienced while monitoring many different endangered species, particularly those that are cryptic. The recorder options included mono and stereo devices, with two sound file processing options (visual and audible analysis). Recording devices provided call‐count data similar to those collected by field observers but at a fraction of the cost, which meant that “idealistic” sampling regimes, previously thought to be too expensive, became feasible for bitterns. Our study is one of the few to assess the monetary value of recording devices in the context of data quality, allowing trade‐offs (and potential solutions) commonly experienced while monitoring cryptic endangered species to be shown and compared more clearly. The ability to overcome challenges of monitoring cryptic species in this way increases research possibilities for data deficient species and is applicable to any species with similar monitoring challenges.