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首页> 外文期刊>The Open Ornithology Journal >Mob Mentality: Effect of a Mobbing Playback on Avian Detection Probabilities during Point Count Surveys
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Mob Mentality: Effect of a Mobbing Playback on Avian Detection Probabilities during Point Count Surveys

机译：暴民的心态：暴动的回放对点计数调查期间鸟类检测概率的影响。

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The probability of detecting an individual or species is an important parameter in studies using mark-recaptureand occupancy models to estimate population sizes and occurrence. Because low detection probabilities result in biasedestimators and decreased precision, biologists seek methods that maximize detection probability. We evaluated whetherwe could increase detections of bird species by playing a tape of Black-capped Chickadee (Poecile atricapillus) mobbingcalls during point counts. We conducted trios of 10-minute counts (two pre-playback and a playback) at 684 stationsthroughout Vermont, in forested, agricultural/grassland, and developed habitats. For each of 73 species detected duringthe surveys, we used occupancy modeling and information-theoretic model selection and averaging methods to evaluatewhether detection probabilities varied due to playback or habitat type. Models containing a playback effect accounted forover 90% of the Akaike weights for 41 species. With 15 of these species, habitat effects also accounted for over 90% ofthe Akaike weights. The playback increased estimated detection probability in all habitats for 14 species, decreased estimateddetection probability for 20 species, and had an estimated effect that varied by habitat for 7 species (many specieswith habitat effects simply had differing magnitudes of the effect dependent on habitat). Smaller resident species were detectedmore often during tape playbacks, but responses were highly variable for most species and the responses did notappear to follow a taxonomic pattern. We encourage researchers to evaluate their list of target species carefully before decidingto use mobbing playbacks to enhance response rates; in many situations mobbing tapes will not enhance detectionsand may complicate the interpretation of model parameters.
机译：在使用标记捕获和占用模型来估计种群数量和发生率的研究中，检测个体或物种的概率是重要的参数。由于低检测概率会导致估计量有偏差且精度降低，因此生物学家寻求使检测概率最大化的方法。我们评估了通过在点数期间播放黑带山雀（Poecile atricapillus）围攻电话是否可以增加对鸟类的发现。我们在佛蒙特州遍布森林，农业/草原和发达栖息地的684个电台进行了10分钟计数的三重奏（两次预播放和一次播放）。对于在调查中检测到的73个物种中的每一个，我们使用占用模型和信息理论模型选择及平均方法来评估由于回放或栖息地类型而导致的检测概率是否有所不同。包含播放效果的模型占41种Akaike权重的90％以上。在其中的15个物种中，栖息地的影响也占赤池重量的90％以上。回放增加了14种物种在所有生境中的估计检测概率，降低了20种物种的估计检测概率，并且其估计效应随7种物种的生境而变化（许多具有生境效应的物种的效应幅度仅取决于生境）。在磁带播放期间，更常检测到较小的居留物种，但是对于大多数物种而言，响应变化很大，并且该响应似乎没有遵循分类模式。我们鼓励研究人员在决定使用围攻回放来提高响应率之前，仔细评估其目标物种清单;在许多情况下，包围带不会增强检测效果，并且可能会使模型参数的解释复杂化。

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