Vismigratie op tijgebonden mondingen van onbevaarbare waterlopen van 1ste categorie: Een case studie op de driesesloot

Research output: Book/ReportReports of Research Institute for Nature and Forest

118 Downloads (Pure)

Abstract

We investigated on behalf of the Flemish Environment Agency (VMM) which method (upstream or selective tidal transport STT) fish use for migration at the mouth of a Zeeschelde tributary stream, namely the Driesesloot.
We compare two management forms at the outlet structure. Under the current water management, drainage is gravitational (the T0 situation): fish can only migrate upstream when the flow velocity is not too high. Under the alternative water management, the check valve of the drainage structure was opened at both downstream and upstream tides (the T1 situation)
We found that opening the check valves (T1 situation) leads to significantly increased fish abundance and species richness.
Furthermore, the study highlights the importance of migration periods, with spring and autumn being peak times for spawning migration and migration to juvenile habitat. To remediate migration bottlenecks at tidal estuaries and thus restore connectivity, it is important to facilitate STT by letting in water.
Original languageDutch
PublisherInstituut voor Natuur- en Bosonderzoek
Number of pages46
DOIs
Publication statusPublished - 2025

Publication series

NameRapporten van het Instituut voor Natuur- en Bosonderzoek
No.1

Thematic List 2020

  • Wildlife management
  • Water

Cite this