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2014_DEMER - Acoustic telemetry data for four fish species in the Demer river (Belgium)
Citable as data publication
Pauwels, I.; Baeyens, R.; De Maerteleire, N.; Desmet, P.; Gelaude, E.; Milotic, T.; Pieters, S.; Reyserhove, L.; Robberechts, K.; Verhelst, P.; Coeck, J.; (2020): 2014_DEMER - Acoustic telemetry data for four fish species in the Demer river (Belgium). Marine Data Archive.
Contact: Pauwels, Ine

Availability: CC0 To the extent possible under law, the person who associated CC0 with this dataset has waived all copyright and related or neighboring rights to this dataset.

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 ( 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. more

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 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 were exported from the European Tracking Network data portal ( developed by VLIZ using the ETN R package ( developed by INBO. Field definitions can be found at

Biology > Acoustics, Biology > Ecology - biodiversity, Biology > Fish
Fresh water, Acoustic telemetry, Acoustic Telemetry, Animal movement, Animal tracking, Biologging, Impact assessment, LifeWatch, Migration, Migration barriers, VEMCO, Belgium, Demer R., Belgium, Flanders, Petromyzon marinus Linnaeus, 1758, Rutilus rutilus (Linnaeus, 1758), Silurus glanis Linnaeus, 1758, Squalius cephalus (Linnaeus, 1758)

Geographical coverage
Belgium, Demer R. [Marine Regions]
Belgium, Flanders [Marine Regions]

Temporal coverage
18 April 2014 - 15 September 2018

Taxonomic coverage
Petromyzon marinus Linnaeus, 1758 [WoRMS]
Rutilus rutilus (Linnaeus, 1758) [WoRMS]
Silurus glanis Linnaeus, 1758 [WoRMS]
Squalius cephalus (Linnaeus, 1758) [WoRMS]

Fish detections
Fish sex
Fish total length
Wet weight of fish

Vlaamse overheid; Beleidsdomein Omgeving; Instituut voor Natuur- en Bosonderzoek (INBO), moredata providerdata creator
Universiteit Gent; Faculteit Wetenschappen; Vakgroep Biologie; Onderzoeksgroep Mariene Biologie (MARBIOL), moredata creator

Related datasets
Parent datasets:
European Tracking Network (ETN) data, more
LifeWatch observatory data: fish acoustic receiver network, more

Based on this dataset
Pauwels, I. et al. (2016). Evaluatie van vismigratie in de Demer in Diest. Evaluatie van de Grote Steunbeer als potentieel knelpunt en de Zwarte Beek als alternatieve route voor vismigratie. Rapporten van het Instituut voor Natuur- en Bosonderzoek, NBO.R.2016.7009776. Instituut voor Natuur- en Bosonderzoek: Brussel. 64 pp., more

Dataset status: Completed
Data type: Data
Data origin: Sensor platform
Metadatarecord created: 2018-01-02
Information last updated: 2020-11-23
All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy