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

Beschikbaarheid: Creative Commons License Deze dataset valt onder een Creative Commons Naamsvermelding 4.0 Internationaal-licentie.

Beschrijving
This study aimed the evaluation of this fish migration position and if fish could pass the weir, by acoustic telemetry. A total of 35 fish were tagged of 5 different species and 2 hybrids: common carp (Cyprinus carpio), Wels catfish (Silurus glanis), European flounder (Platichthys flesus), roach (Rutilus rutilus), European eel (Anguilla anguilla), roach x rudd and roach x bream. We evaluated individual fish behaviour up-, downstream and near the weir and evaluatied if and when fish passed the weir. meer

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 weir on the river Dijle upstream of Mechelen formed partially a physical barrier for the upstream migration of fish to the upstream part of the Dijle basin and the total of the Demer basin. An attempt has been made to resolve the shortcommings of the weir as migration obstruction, by the setting of a fish migration position. Results showed that 21 of 35 fish were able to pass the weir at specific hydrological conditions and weir management options. The number of passages differed between species, but happened always in the periods that higher passage could be expected following their lifestyle. The study indicates the importance and benefits of a fish-friendly weir management.

Scope
Thema's:
Biologie > Ecologie - biodiversiteit, Biologie > Vis
Kernwoorden:
Zoet water, Acoustic telemetry, Fish behaviour, Kuit schieten, Paaien, Migratie, Migration barriers, Tracking data, Belgium, Demer, Belgium, Dijle, Anguilla anguilla (Linnaeus, 1758), Cyprinus carpio Linnaeus, 1758, Platichthys flesus (Linnaeus, 1758), Rutilus rutilus (Linnaeus, 1758), Silurus glanis Linnaeus, 1758

Geografische spreiding
Belgium, Demer
Belgium, Dijle

Spreiding in de tijd
2014 - 2018

Taxonomische spreiding
Anguilla anguilla (Linnaeus, 1758) [WoRMS]
Cyprinus carpio Linnaeus, 1758 [WoRMS]
Platichthys flesus (Linnaeus, 1758) [WoRMS]
Rutilus rutilus (Linnaeus, 1758) [WoRMS]
Silurus glanis Linnaeus, 1758 [WoRMS]

Bijdrage door
Vlaamse overheid; Beleidsdomein Omgeving; Instituut voor Natuur- en Bosonderzoek (INBO), meerdata creator

Gerelateerde datasets
Maakt deel uit van:
ETN data: fish acoustic receiver network, meer
LifeWatch observatory data: fish acoustic receiver network, meer

Dataset status: Afgelopen
Data type: Data
Data oorsprong: Sensor platform
Metadatarecord aangemaakt: 2018-01-02
Informatie laatst gewijzigd: 2018-01-02
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