European eel, Anguilla anguilla (L.), migrating to sea encounter many man‐made structures that can hamper and delay migration or induce mortality. Three pumping stations in Friesland, the Netherlands, were covered with acoustic receivers. Ninety‐three silver eels tagged with acoustic transmitters were released in the polders upstream of the stations and 89% were detected passing a pumping station. The majority of silver eels passed the stations within a day after arriving at the station. Four silver eels stayed for longer than 2 weeks before passage, and 18 were detected at the receiver downstream the pumping station for more than one day, with detections up to several weeks. These detections probably indicated a dead eel, but could also indicate a live eel remaining at the site. Most of the silver eels passed the pumping stations within a day after release, so fish‐friendly pumps will benefit the migrating population most. In the Netherlands, there are several thousand pumping stations. Installing fish passages near these stations is not feasible due to high costs. Prioritising all these sites in relation to the degree of blockage, mortality rates and its relative importance for migratory fish, can maximise the effectiveness of measures and mitigation taken.

中文翻译：

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银鳗，安圭拉鳗鱼通过荷兰的三个水泵站迁移

欧洲鳗，安圭拉安圭拉（L.），迁移到海中会遇到许多人造结构，这些结构可能会阻碍和延迟迁移或导致死亡。荷兰弗里斯兰的三个泵站都被扩音器覆盖。贴有声发射器的九十三只银鳗被释放到加油站上游的released田中，发现有89％的银e通过泵站。大多数银鳗在到达车站后的一天之内就通过了车站。四只银鳗在通过之前停留了超过2周，在抽水站下游的接收器处检测到18只银鳗超过一天，发现时间长达数周。这些检测结果可能表明鳗鱼已死，但也可能表明现场还剩有鳗鱼。放出后一天之内，大多数白silver都通过了抽水站，因此，鱼类友好型泵将使移徙人口受益最大。在荷兰，有数千个泵站。由于成本高昂，在这些站附近安装鱼道是不可行的。优先考虑所有这些地点的阻塞程度，死亡率及其对迁徙鱼类的相对重要性，可以最大程度地采取措施和采取缓解措施。