Abstract Commercial Snow Crab (Chionoecetes opilio) harvesters believe marine noise from seismic surveys reduces commercial Snow Crab catch rates. Depending on the type of seismic survey used, animals living in a particular area could be exposed to loud noise (e.g. daily Sound Exposure Level (SEL) >165 dB re 1 μPa2·s) for periods ranging from hours (typical 2D survey) to months (detailed 3D survey). This field experiment applied a series of comparisons conducted within a Before-After-Control-Impact study design to investigate the effect of prolonged industrial 3D seismic exposure on the catch rates of Snow Crab over nine weeks in 2017 and five weeks in 2018. Changes in catch rates at 3D seismic surveying sites were inconsistent across years, with reduced catches in 2017 and increased catches in 2018. Catch rates were similar at experimental and control sites within two weeks after exposure, and the potential effect of seismic surveying was not measured at a distance of 30 km. The large variation in catch rates across small temporal and spatial scales coupled with the absence of notable mechanistic responses of Snow Crab in past studies to seismic in associated snow crab movement behavior, gene expression and physiology, we conclude that the observed differences owing to seismic surveying in our study design are likely a result of stochastic processes external to our manipulation.

中文翻译：

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3D地震测量对雪蟹渔业的影响

摘要 商业雪蟹 (Chionoecetes opilio) 收割者认为地震调查产生的海洋噪音会降低商业雪蟹的捕获率。根据所使用的地震勘测类型，生活在特定区域的动物可能会暴露在巨大的噪音中（例如，每日声暴露水平 (SEL) >165 dB re 1 μPa2·s）持续数小时（典型 2D 勘测）到月（详细的 3D 调查）。该现场实验应用了一系列在“前后控制-影响”研究设计中进行的比较，以研究长时间工业 3D 地震暴露对 2017 年 9 周和 2018 年 5 周内雪蟹捕获率的影响。 3D 地震勘测站点的捕获率各年不一致，2017 年捕获量减少，2018 年捕获量增加。暴露后两周内，实验地点和控制地点的捕获率相似，并且在 30 公里的距离内未测量地震勘测的潜在影响。小时间和空间尺度上捕获率的巨大变化，加上过去研究中雪蟹在相关雪蟹运动行为、基因表达和生理学方面对地震没有显着的机械响应，我们得出结论，由于地震勘测观察到的差异在我们的研究设计中，很可能是我们操作之外的随机过程的结果。