8be8dcf1-6e83-4172-a7b7-c2032b933d23 Ine Pauwels Research Institute for Nature and Forest (INBO)

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0000-0002-2856-8787 Raf Baeyens Research Institute for Nature and Forest (INBO)

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0000-0002-0651-3056 Nico De Maerteleire Research Institute for Nature and Forest (INBO)

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Peter Desmet Research Institute for Nature and Forest (INBO)

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0000-0002-8442-8025 Emilie Gelaude Research Institute for Nature and Forest (INBO)

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Tanja Milotic Research Institute for Nature and Forest (INBO)

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0000-0002-3129-6196 Sébastien Pieters Research Institute for Nature and Forest (INBO)

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Lien Reyserhove Research Institute for Nature and Forest (INBO)

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0000-0001-7484-9267 Karen Robberechts Research Institute for Nature and Forest (INBO)

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Pieterjan Verhelst Ghent University

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0000-0002-2610-6941 Johan Coeck Research Institute for Nature and Forest (INBO)

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0000-0003-2732-7428 Peter Desmet peter.desmet@inbo.be 0000-0002-8442-8025 2026-04-23 eng 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 <a href="https://lifewatch.be/en/fish-acoustic-receiver-network">(https://lifewatch.be/en/fish-acoustic-receiver-network)</a> 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 (<i>Petromyzon marinus</i>, <i>Rutilus rutilus</i>, <i>Silurus glanis</i>, <i>Squalius cephalus</i>) 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 (<i>Petromyzon marinus</i>), two roach (<i>Rutilus rutilus</i>), nine Wels catfish (<i>Silurus glanis</i>) and three chub (<i>Squalius cephalus</i>) 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 Grote Steunbeer 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 <a href="https://inbo.github.io/etn/"> etn </a> package and are downsampled to the first detection per hour. The original data are managed in the European Tracking Network data platform (<a href="https://lifewatch.be/etn/">https://lifewatch.be/etn/</a>) and are available in Pauwels et al. (2020, <a href="https://doi.org/10.14284/432">https://doi.org/10.14284/432</a>). Acoustic telemetry ASFA Thesaurus List Acoustic Telemetry ETN Context animal movement animal tracking biologging impact assessment LifeWatch migration barriers VEMCO n/a Migration CSA Technology Research Database Master Thesaurus Occurrence GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type_2015-07-10.xml To the extent possible under law, the publisher has waived all rights to these data and has dedicated them to the Public Domain (CC0 1.0). Users may copy, modify, distribute and use the work, including for commercial purposes, without restriction. Creative Commons Zero v1.0 Universal https://spdx.org/licenses/CC0-1.0.html CC0-1.0 Belgium, Demer (http://marineregions.org/mrgid/3101); Belgium, Flanders (http://marineregions.org/mrgid/2469). 3.96965 5.078023 51.242076 50.98197 2014-04-18 2018-09-15 species Petromyzon marinus Linnaeus, 1758 species Rutilus rutilus (Linnaeus, 1758) species Silurus glanis Linnaeus, 1758 species Squalius cephalus (Linnaeus, 1758) notPlanned Ine Pauwels Research Institute for Nature and Forest (INBO)

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0000-0002-2856-8787 2024-07-08T23:33:06.000+00:00 dataset Pauwels I, Baeyens R, De Maerteleire N, Desmet P, Gelaude E, Milotic T, Pieters S, Reyserhove L, Robberechts K, Verhelst P, Coeck J (2025). 2014_DEMER - Acoustic telemetry data for four fish species in the Demer river (Belgium). Version 1.2. Research Institute for Nature and Forest (INBO). Occurrence dataset. https://doi.org/10.14284/432 https://ipt.gbif-test.org/resource?id=etn_emof_test/v1.2.xml