2014_DEMER - Acoustic telemetry data for four fish species in the Demer river (Belgium)

This is an acoustic telemetry dataset published by the Research Institute for Nature and Forest (INBO). It contains animal (fish) tracking data collected by the Permanent Belgian Acoustic Receiver Network (https://lifewatch.be/en/fish-acoustic-receiver-network) for the project/study 2014_demer, using VEMCO tags (V7, V13) and receivers (VR2W). In total 16 adult individuals of four local wild fish species (Petromyzon marinus, Rutilus rutilus, Silurus glanis, Squalius cephalus) were captured, tagged and released in 2014, to study the effect of a specific barrier on their upstream/downstream migration in the Demer basin. Longitudinal and lateral connectivity of rivers is necessary for fish to successfully fulfill their life cycle. In Flanders, fish are obstructed in their essential free migrations by weirs, sluices, mills, and pumping stations, which are needed to control the water level. The Demer river drains the eastern part of the Scheldt basin. Fish migrating from the sea to the Demer river are obstructed by three hydraulic constructions. In this study we aimed to evaluate the possibilities for fish migration around the most upstream of these three constructions, the Grote Steunbeer in the city of Diest. Therefore, behaviour of two sea lamprey (Petromyzon marinus), two roach (Rutilus rutilus), nine Wels catfish (Silurus glanis) and three chub (Squalius cephalus) was investigated by acoustic telemetry in the areas up-, downstream and around the fish migration barrier. The results indicated that free upstream fish migration in the Demer river is obstructed by the Great Support Bear barrier in its current state, and that adaptations to this barrier should get priority as the tributary of the Zwarte beek only partly offers an alternative route for fish to qualitative spawning habitats upstream. This dataset was collected using infrastructure provided by VLIZ and INBO funded by the Research Foundation - Flanders (FWO) as part of the Belgian contribution to LifeWatch. The study was commissioned by the Flemish Environment Agency (VMM). Data have been standardized to Darwin Core using the etn package and are downsampled to the first detection per hour. The original data are managed in the European Tracking Network data platform (https://lifewatch.be/etn/) and are available in Pauwels et al. (2020, https://doi.org/10.14284/432).本数据集由比利时自然与森林研究所（Research Institute for Nature and Forest, INBO）发布，属于鱼类声学遥测数据集。该数据集收录了比利时永久声学接收站网络（https://lifewatch.be/en/fish-acoustic-receiver-network）为“2014_demer”研究项目采集的鱼类追踪数据，所用标记设备为VEMCO声标记（V7、V13型号），接收设备为VR2W型声学接收器。 2014年，研究人员捕获并标记、放归了隶属于4种本土野生鱼类的16尾成体个体，分别为海七鳃鳗（Petromyzon marinus）、欧鳊（Rutilus rutilus）、六须鲶（Silurus glanis）与高体雅罗鱼（Squalius cephalus），旨在探究特定障碍物对迪默河流域鱼类溯河/降河洄游的影响。 河流的纵向与侧向连通性是鱼类完成完整生命周期的必要前提。在佛兰德斯地区，用于调控水位的堰坝、水闸、磨坊与泵站阻碍了鱼类必需的自由洄游。迪默河是埃斯科河（Scheldt）流域东部的支流，从海洋洄入迪默河的鱼类会受到三处水工构筑物的阻隔。本研究聚焦评估这三处构筑物中最上游的迪斯特市（Diest）大支撑坝（Grote Steunbeer）周边的鱼类洄游可行性。为此，研究人员通过声学遥测技术，对2尾海七鳃鳗、2尾欧鳊、9尾六须鲶与3尾高体雅罗鱼的行为进行了追踪，监测范围覆盖该鱼类洄游障碍物的上游、下游及周边区域。 研究结果显示，当前状态下的大支撑坝完全阻断了迪默河中的鱼类自由溯河洄游；且作为上游优质产卵栖息地替代通道的兹瓦特贝克（Zwarte beek）支流仅能部分满足需求，因此对该障碍物进行适应性改造应被列为优先事项。 本数据集依托佛兰德斯海洋研究所（VLIZ）与INBO提供的基础设施采集，相关研究由佛兰德斯研究基金会（FWO）资助，作为比利时参与LifeWatch计划的项目之一。本研究由佛兰德斯环境署（VMM）委托开展。 所有数据已通过etn数据包标准化为达尔文核心标准（Darwin Core），并下采样为每小时首次检测记录。原始数据存储于欧洲追踪网络数据平台（https://lifewatch.be/etn/），相关研究成果可参见Pauwels等人（2020）的文献（https://doi.org/10.14284/432）。