Fischabstiegs- und Fischschutzanlagen an der Wasserkraftanlage ECI-Centrale in Roermond/Niederlande

Dumont, Ulrich; Hermens, Gereon

doi:10.1365/s35147-012-0306-x

Cited by 4 publications

(1 citation statement)

References 1 publication

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“…Providing alternative migration routes or fishways near the bottom near objects such as a trash rack could enhance the redirection of eels away from the pumping station, thereby contributing to eel migration survival. Bottom bypasses have been suggested over surface bypasses for eel (Dumont & Hermens, 2012; Gosset, Travade, Durif, Rives, & Elie, 2005; Klopries, Deng, Lachmann, Schüttrumpf, & Trumbo, 2018); however, surface bypasses have also been reported to benefit eel migration (Travade et al, 2010). Redirection would, however, only work if there are other possibilities to migrate and it should be taken into account that eels follow migration routes with the largest portion of water flow (Jansen et al, 2007; Økland et al, 2019; Trancart et al, 2018; Travade et al, 2010).…”

Section: Implications For Managementmentioning

confidence: 99%

Behavioural responses of eel (Anguilla anguilla) approaching a large pumping station with trash rack using an acoustic camera (DIDSON)

Keeken

Hal

Winter

et al. 2020

Fisheries Management Eco

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European eel, Anguilla anguilla L., migrating to the sea encounter many man‐made structures that can hamper and delay migration or induce mortality. Studying small‐scale behavioural movements in front of these man‐made structures could provide insight in further mitigating adverse effects. The behaviour of eel approaching a trash rack in front of a large pumping station was investigated using a dual‐frequency identification sonar (DIDSON). Eels approaching the trash rack swam through the rack (40.5%) but also showed turning behaviour at (44.7%) or in front of the rack (14.7%). Eels approaching the rack had varying body positions, predominantly head or tail first, but also curled up into a ball or drifted sideways. After turning in front or at the trash rack, eels showed upstream and downwards swimming towards the canal bottom. The results suggest a stepwise response to potential cues, when firstly the body position is changed in such a way that secondly, later on, enhances eventual fast upstream escapement when perceived necessary. Implications for management of these behavioural observations are discussed.

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Section: Implications For Managementmentioning

confidence: 99%

Behavioural responses of eel (Anguilla anguilla) approaching a large pumping station with trash rack using an acoustic camera (DIDSON)

Keeken

Hal

Winter

et al. 2020

Fisheries Management Eco

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Surface bypass as a means of protecting downstream-migrating fish: lack of standardised evaluation criteria complicates evaluation of efficacy

Klopries

Deng

Lachmann

et al. 2018

Mar. Freshwater Res.

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Surface bypasses are downstream migration structures that can help reduce hydropower-induced damage to migrating fish. However, no comprehensive design concept that facilitates good surface bypass performance for a wide range of sites and species is available. This is why fish-passage efficiencies at recently built bypass structures vary widely between 0% and up to 97%. We reviewed 50 surface bypass performance studies and existing guidelines for salmonids, eels and potamodromous species to identify crucial design criteria for surface bypasses employed in North America, Europe and Australia. Two-tailed Pearson correlation of bypass efficiency and bypass design criteria shows that bypass entrance area (r=0.3300, P=0.0036) and proportion of inflow to the bypass (r=0.3741, P=0.0032) are the most influential parameters on bypass efficiency. However, other parameters such as guiding structures (P=0.2181, ordinary Student’s t-test) and trash-rack spacing (r=–0.1483, P=0.3951, Spearman correlation), although not statistically significant, have been shown to have an effect on efficiency in some studies. The use of different performance criteria and efficiency definitions for bypass evaluation hampers direct comparison of studies and, therefore, deduction of design criteria. To enable meta-analyses and improve bypass design considerations, we suggest a list of standardised performance parameters for bypasses that should be considered in future bypass-performance studies.

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Herstellung der Durchgängigkeit des Mündungsdeltas der Rur in die Maas

Hermens¹,

Keuneke²

2012

Wasserwirtsch

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Fischabstiegs- und Fischschutzanlagen an der Wasserkraftanlage ECI-Centrale in Roermond/Niederlande

Cited by 4 publications

References 1 publication

Behavioural responses of eel (Anguilla anguilla) approaching a large pumping station with trash rack using an acoustic camera (DIDSON)

Behavioural responses of eel (Anguilla anguilla) approaching a large pumping station with trash rack using an acoustic camera (DIDSON)

Surface bypass as a means of protecting downstream-migrating fish: lack of standardised evaluation criteria complicates evaluation of efficacy

Herstellung der Durchgängigkeit des Mündungsdeltas der Rur in die Maas

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