Evaluation of downstream migration mitigation actions for eel at an Archimedes screw pump pumping station

David Buysse, Ans Mouton, Raf Baeyens, Johan Coeck

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    Eel, Anguilla anguilla (L.), mortality was studied in a Belgian lowland canal after downstream passage through a large and small de Wit-adapted Archimedes screw pump over a 12-month period. The hypothesis tested was the minimisation of fish injuries with the de Wit adaptation. Simultaneously, downstream migration through a Dutch pool and orifice fishway alongside the pumping station (PS) was monitored. Nets were mounted on the outflow of the
    pumps, and a cage was placed in the fishway. Based on the condition of the fish and injuries sustained, the assessed maximum mortality rates ranged from 19 4% for the large de Wit Archimedes screw pump to 14 8% for the small de Wit Archimedes screw pump. The screw adaptations did not substantially minimise grinding injuries and overall mortality, and the fishway did not mitigate downstream eel migration. To achieve escapement targets set in the eel management plans, fish-friendly pump designs and effective PS bypass solutions are needed.
    TaalEngels
    Artikel nummer22
    TijdschriftFisheries Management and Ecology
    Volume2015
    Exemplaarnummer22
    Pagina's (van-tot)286–294
    Aantal pagina's9
    ISSN0969-997X
    StatusGepubliceerd - 2015

    Thematische lijst

    • Beheer
    • Soorten en biotopen

    EWI Biomedische wetenschappen

    • B003-ecologie
    • barrier
    • delayed mortality
    • Anguilla
    • downstream migration dynamics
    • fish friendly
    • fish passage

    Taxonomische lijst

    • vissen (Pisces)
    • palingen (Anguillidae)
    • palingachtigen (Anguillidae)

    Beleidsmatig

    • aquatisch beheer
    • beleidsevaluatie

    Geografische lijst

    • polders
    • Schelde

    Technologisch

    • evaluatietechnieken
    • veldwerk (observatie en staalname)

    Dit citeren