The number of submarine power cables using either direct or alternating current is expected to increase drastically in coming decades. Data concerning the impact of magnetic fields generated by these cables on marine invertebrates are scarce. In this context, the aim of this study was to explore the potential impact of anthropogenic static and time-varying magnetic fields on the behavior of recently settled juvenile European lobsters (Homarus gammarus) using two different behavioral assays. Day-light conditions were used to stimulate the sheltering behavior and facilitate the video tracking. We showed that juvenile lobsters did not exhibit any change of behavior when submitted to an artificial magnetic field gradient (maximum intensity of 200 μT) compared to non-exposed lobsters in the ambient magnetic field. Additionally, no influence was noted on either the lobsters' ability to find shelter or modified their exploratory behavior after one week of exposure to anthropogenic magnetic fields (225 ± 5 μT) which remained similar to those observed in control individuals. It appears that static and time-varying anthropogenic magnetic fields, at these intensities, do not significantly impact the behavior of juvenile European lobsters in daylight conditions. Nevertheless, to form a complete picture for this biological model, further studies are needed on the other life stages as they may respond differently.

中文翻译：

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AC / DC海底电力电缆产生的磁场对欧洲少年龙虾（Homarus gammarus）行为的影响。

预计在未来几十年中，使用直流电或交流电的海底电缆的数量将急剧增加。关于这些电缆产生的磁场对海洋无脊椎动物的影响的数据很少。在这种情况下，本研究的目的是使用两种不同的行为分析方法，探讨人为产生的静磁场和时变磁场对最近定居的欧洲小龙虾（Homarus gammarus）行为的潜在影响。使用日光条件来刺激避难行为并促进视频跟踪。我们显示，与环境磁场中未暴露的龙虾相比，当经受人工磁场梯度（最大强度为200μT）时，少年龙虾没有表现出任何行为变化。此外，在暴露于人为磁场（225±5μT）一周后，对龙虾寻找庇护或改变其探索行为的能力均未见影响，这与对照个体中观察到的相似。看起来，在这些强度下，人为的静态和时变磁场不会显着影响日光条件下欧洲少年龙虾的行为。但是，要形成这种生物学模型的完整图片，还需要对其他生命阶段进行进一步研究，因为它们的反应可能有所不同。看起来，在这些强度下，人为的静态和时变磁场不会显着影响日光条件下欧洲少年龙虾的行为。但是，要形成这种生物学模型的完整图片，还需要对其他生命阶段进行进一步研究，因为它们的反应可能有所不同。看起来，在这些强度下，人为的静态和时变磁场不会显着影响日光条件下欧洲少年龙虾的行为。但是，要形成这种生物学模型的完整图片，还需要对其他生命阶段进行进一步研究，因为它们的反应可能有所不同。