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Potential re-establishment of driadromous fish species in the River Scheldt (Belgium) Buysse, D.; Coeck, J.; Maes, J. (2008). Potential re-establishment of driadromous fish species in the River Scheldt (Belgium). Hydrobiologia 602(1): 155-159. http://dx.doi.org/10.1007/s10750-008-9292-5 In: Hydrobiologia. Springer: The Hague. ISSN 0018-8158; e-ISSN 1573-5117

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 133372 [ download pdf ]

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Trefwoorden

Barriers Chemical elements > Nonmetals > Atmospheric gases > Oxygen > Dissolved gases > Dissolved oxygen Pollution Upstream migrations België, Schelde R. [Marine Regions] Brak water; Zoet water

Author keywords

diadromous fish; upstream migration; pollution; dissolved oxygen;migration barriers; habitat fragmentation

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Auteurs		Top
Buysse, D. Coeck, J. Maes, J.

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Abstract

This study (2002) documents on the inland penetration off diadromous fish species into the tidal and non-tidal part of the River Scheldt and on the impact of two lock-weir complexes. Long-term trends in oxic conditions show the river is undergoing a natural recovery process, nevertheless five of ten diadromous species recorded were still restricted to the brackish part of the estuary. Despite poor conditions, five species reached the upper freshwater part of the estuary. Erratic free-flowing conditions at the tidal weir offered limited opportunities for some diadromous species to migrate into the non-tidal part of the river. Upstream migration over the second barrier is almost completely blocked. Rehabilitation schemes to restore self-sustaining populations of diadromous fish in the cross-border River Scheldt need to include the building of fish bypasses and improved wastewater treatment and habitat restoration programmes.

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