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Rank aggregation of local expert knowledge for conservation planning of the critically endangered saola

机译：批判性濒临灭绝的Saola保护计划的当地专家知识的汇总

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There has been much recent interest in using local knowledge and expert opinion for conservation planning, particularly for hard-to-detect species. Although it is possible to ask for direct estimation of quantities such as population size, relative abundance is easier to estimate. However, an expert's knowledge is often geographically restricted relative to the area of interest. Combining (or aggregating) experts' assessments of relative abundance is difficult when each expert only knows a part of the area of interest. We used Google's PageRank algorithm to aggregate ranked abundance scores elicited from local experts through a rapid rural-appraisal method. We applied this technique to conservation planning for the saola (Pseudoryx nghetinhensis), a poorly known bovid. Near a priority landscape for the species, composed of 3 contiguous protected areas, we asked groups of local people to indicate relative abundances of saola and other species by placing beans on community maps. For each village, we used this information to rank areas within the knowledge area of that village for saola abundance. We used simulations to compare alternative methods to aggregate the rankings from the different villages. The best-performing method was then used to produce a single map of relative abundance across the entire landscape, an area larger than that known to any one village. This map has informed prioritization of surveys and conservation action in the continued absence of direct information about the saola.
机译：最近利用当地的知识和专家看法，特别是保护计划，特别是对于难以检测的物种。尽管可以要求直接估计数量，例如人口大小，相对丰富更容易估计。然而，专家的知识通常相对于感兴趣领域地理位置限制。当每个专家只知道感兴趣领域的一部分时，相结合（或聚合）专家对相对丰富的评估很困难。我们使用谷歌的PageRank算法通过快速的农村评估方法汇总从当地专家引发的排名丰富分数。我们将这种技术应用于Saola（假疗X Nghetinhensis）的保护计划，令人着名的牛皮。靠近物种的优先景观，由3个连续保护区组成，我们要求当地人团体通过将豆类放在社区地图上，表明Saola和其他物种的相对丰富。对于每个村庄，我们将这些信息用于排名在该村庄的知识区域内的区域，以获得Saola丰富。我们使用模拟来比较替代方法来汇总不同村庄的排名。然后使用最佳性能的方法在整个景观中产生相对丰度的单个地图，该区域大于任何一个村庄所知的面积。该地图在继续缺乏有关Saola的直接信息的情况下了解了调查和保护行动的优先级。

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