The spread of non-indigenous crayfish species poses a threat to local populations of crayfish as well as to other fauna and flora across Europe and around the world. Several methods have been used in attempt to reduce their numbers and stop their further spread. Crayfish barriers are the best way to stop the non-anthropogenic spread of established invasive crayfish populations. Up to now there are very few published papers regarding crayfish barrier design and practical experience in construction. For the last seven years, we have optimised construction and functionality of crayfish barriers, tested various building materials and planned construction of many barriers across Switzerland. In this article, we highlight our experience, share the acquired knowledge and present the newest findings regarding considerations, which must be made when planning a barrier to stop the upstream movement of non-indigenous crayfish species. From our experience we conclude that crayfish barriers work in preventing the movement of invasive species if certain factors are taken into account. Barrier design and construction must be specific for each project, because the size of the watercourse, flow velocity, bank conditions, existing constructions and accessibility, all change the way a barrier should be set-up.

非本土小龙虾物种的扩散对当地小龙虾以及整个欧洲和世界其他动植物群构成威胁。已经尝试了几种方法来尝试减少其数量并阻止其进一步传播。小龙虾壁垒是阻止已建立的侵入性小龙虾种群非人为传播的最佳方法。到目前为止，关于小龙虾屏障设计和施工实践经验的发表论文很少。在过去的七年中，我们优化了小龙虾屏障的结构和功能，测试了各种建筑材料，并计划在瑞士各地建造许多屏障。在本文中，我们重点介绍我们的经验，分享获得的知识，并介绍有关注意事项的最新发现，在计划屏障以阻止非本地小龙虾物种向上游移动时必须采取这些措施。根据我们的经验，我们得出结论，如果考虑到某些因素，小龙虾屏障可防止入侵物种的移动。屏障的设计和建造必须针对每个项目而定，因为水道的大小，流速，河岸条件，现有的构造和可及性都会改变屏障的设置方式。