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Fish behaviour around the third of three fish migration barriers preventing (diadromous) fish (such as sea lamprey, among others) to reach the spawning habitats in the Demer basin
Contact: Coeck, Johan

Availability: Creative Commons License This dataset is licensed under a Creative Commons Attribution 4.0 International License.

Description
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, pumping stations, …, which are needed to control the water level. The river Demer drains the eastern part of the Scheldt basin. Fish migrating from the sea to the river Demer is obstructed by three hydraulic constructions. In this study we aim 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 sea lamprey (Petromyzon marinus), roach (Rutilus rutilus), Wels catfish (Silurus glanis) and chub (Squalius cephalus) was investigated by acoustic telemetry in the areas up-, downstream and around the fish migration barrier. more

The results indicate that free upstream fish migration in the river Demer is hampered by the Grote Steunbeer barrier in its current state, and that adaptions to this barier should get priority as the tributary of the Zwarte beek only partly offers an alternative route for fish to qualitative spanwning habitats upstream.

Scope
Themes:
Biology > Ecology - biodiversity, Biology > Fish
Keywords:
Fresh water, Acoustic telemetry, Fish behaviour, Migration, Migration barriers, Spawning, Tracking data, Belgium, Demer, Petromyzon marinus Linnaeus, 1758, Rutilus rutilus (Linnaeus, 1758), Silurus glanis Linnaeus, 1758, Squalius cephalus (Linnaeus, 1758)

Geographical coverage
Belgium, Demer

Temporal coverage
2014 - 2018

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

Contributors
Universiteit Gent (UGent), moredata creator
Vlaamse overheid; Beleidsdomein Omgeving; Instituut voor Natuur- en Bosonderzoek (INBO), moredata creator

Related datasets
Parent datasets:
ETN data: fish acoustic receiver network, more
LifeWatch observatory data: fish acoustic receiver network, more

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