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首页> 外文期刊>North American Journal of Fisheries Management >Conditional Capture Probability of Pallid Sturgeon in Benthic Trawls
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Conditional Capture Probability of Pallid Sturgeon in Benthic Trawls

机译：底栖拖网中lid St的条件捕获概率。

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摘要

Long-term population monitoring assumes that relative abundance reflects trends in the population. Sampling efficiency and capture probability are assumed to be consistent so samples can be temporally and spatially compared. Benthic otter trawls are being used for a long-term monitoring project on the Missouri River. To estimate the capture probability of Pallid Sturgeon Scaphirhynchus albus, we used acoustic telemetry to locate and target tagged sturgeon with benthic otter trawls. Conditional capture probability (p(i)*) of a fish in a known location was only 0.08 on the first pass, increased slightly (p(i)* = 0.18) on the second pass, and again on the third pass (p(i)* = 0.26). Individual habitat parameters or their interactions did not explain when Pallid Sturgeon were successfully or unsuccessfully captured. Our study suggests that otter trawls are a highly inefficient gear for capturing Scaphirhynchus species. Therefore, relative abundance indices based on otter trawl captures need to be assessed cautiously for juvenile and adult Pallid Sturgeon, especially in highly variable conditions.
机译：长期人口监测假设相对丰度反映了人口趋势。假定采样效率和捕获概率是一致的，因此可以在时间和空间上比较样本。本底水獭拖网被用于密苏里河的长期监测项目。为了估计苍白St鱼Scaphirhynchus albus的捕获概率，我们使用了声学遥测技术来定位和瞄准带有底栖水獭拖网的带标签tagged鱼。已知位置的鱼的条件捕获概率（p（i）*）在第一遍时仅为0.08，在第二遍时略有增加（p（i）* = 0.18），在第三遍时再次（p（i）* = 0.18） i）* = 0.26）。个体生境参数或它们之间的相互作用并不能解释何时成功或不成功地捕获了lid鱼。我们的研究表明，水獭拖网是捕获S鱼物种的一种非常低效的工具。因此，对于幼年和成年苍白lid鱼，尤其是在高度可变的条件下，需要谨慎评估基于水獭拖网捕捞的相对丰度指数。

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