scholarly journals Performance of a fish pass for multiple species: Scale model investigation

2018 ◽  
Vol 40 ◽  
pp. 03010
Author(s):  
Didier Bousmar ◽  
Estelle Courtois ◽  
Loïc Van Audenhaege ◽  
Xavier Rollin
Keyword(s):  
Juvenile Fish ◽  
Video Recording ◽  
Scale Model ◽  
Pit Tag ◽  
Cottus Gobio ◽  
Fish Pass ◽  
Vertical Slot ◽  
Ecological Continuity ◽  
Multiple Species ◽  
Swimming Capacity

Artificial fish passes are often the most effective solution to restore the ecological continuity of a dammed river. Such a pass can be built for specifically targeted fish species, based on the existing knowledge on its swimming capacity and behaviour. Usually, a wider range of possible species are present in the river and may use the fish pass. In the present study, a vertical slot fish pass has been designed for salmonid fish (namely Atlantic salmon Salmo Salar). This fish pass layout was initially tested using a scale model where juvenile fish were introduced. The study has now been extended to other species, some of them having weaker swimming capacity: bleak (Alburnus alburnus); chub (Squalius cephalus); and bullhead (Cottus gobio). Fish behaviour in the pass was observed using PIT-tag and video. PIT-tag tracking enabled to characterise the capability of the fish to cross the whole fish pass. Video recording was used to analyse in more details the behaviour of the fish in a specific pool.

Scale model of a new midwater trawl system for sampling pelagic larval and juvenile fish

2001 ◽  
Vol 67 (2) ◽  
pp. 254-259 ◽  
Author(s):  
Fuxiang Hu ◽  
Yoshioki Oozeki ◽  
Tadashi Tokai ◽  
Ko Matuda
Keyword(s):  
Juvenile Fish ◽  
Scale Model ◽  
Midwater Trawl

scholarly journals The meander‐type fish pass: An alternative to the conventional vertical slot pass

2021 ◽  
Author(s):  
Ulf Helbig ◽  
Matthias Mende ◽  
Werner Dönni ◽  
Klaas Rathke
Keyword(s):  
Fish Pass ◽  
Vertical Slot

Performance of a pool-and-weir fish pass for small bottom-dwelling freshwater fish species in a regulated lowland river

2007 ◽  
Vol 57 (4) ◽  
pp. 423-432 ◽  
Author(s):  
Evelien Maerten ◽  
Marcel Eens ◽  
Guy Knaepkens
Keyword(s):  
Freshwater Fish ◽  
Fish Species ◽  
Fish Assemblages ◽  
Regulated River ◽  
Lowland River ◽  
Stone Loach ◽  
Spined Loach ◽  
Freshwater Fish Species ◽  
Cottus Gobio ◽  
Fish Pass

AbstractAlthough small benthic freshwater fish species are an important biological component of fish assemblages and free instream movement is indispensable for their survival, they are often neglected in fish pass performance studies. In this study, a capture-mark-recapture approach was used to assess whether small bottom-dwelling species, including gudgeon (Gobio gobio), stone loach (Barbatula barbatula), spined loach (Cobitis taenia) and bullhead (Cottus gobio), were able to cross a pool-and-weir fish pass in a regulated lowland river. Some tagged individuals of stone loach (18%), gudgeon (7%) and spined loach (2%) managed to successfully ascend the fish pass under study, despite the fact that water velocity levels in the different overflows of the facility (between 0.55-1.22 m/s) exceeded the critical swimming speed of all three species. Although this suggests that a pool-and-weir fish pass is a able to facilitate upstream movement of some small benthic species in a regulated river, more detailed research incorporating advanced tagging and retrieving techniques is necessary.

scholarly journals Performance of a Vertical-Slot Fish Pass for the Sea LampreyPetromyzon marinusL. and Habitat Recolonization

2016 ◽  
Vol 33 (1) ◽  
pp. 16-26 ◽  
Author(s):  
E. Pereira ◽  
B. R. Quintella ◽  
C. S. Mateus ◽  
C. M. Alexandre ◽  
A. F. Belo ◽  
...  
Keyword(s):  
Fish Pass ◽  
Vertical Slot

scholarly journals Passage Performance of Technical Pool-Type Fishways for Potamodromous Cyprinids: Novel Experiences in Semiarid Environments

2019 ◽  
Author(s):  
Francisco J. Sanz-Ronda ◽  
Francisco J. Bravo-Córdoba ◽  
Ana Sánchez-Pérez ◽  
Ana García-Vega ◽  
Jorge Valbuena-Castro ◽  
...  
Keyword(s):  
Fish Passage ◽  
Swimming Behavior ◽  
Fish Migration ◽  
Pit Tag ◽  
Semiarid Environments ◽  
Vertical Slot ◽  
Longitudinal Connectivity ◽  
The World ◽  
Migration Pathways ◽  
Pool Type

Endemic freshwater fish from semiarid environments are among the most threated species in the world due to the water overexploitation and habitat fragmentation problems. Stepped or pool-type fishways are used worldwide to reestablish longitudinal connectivity and mitigate fish migration problems. Many of them are being installed or planned in rivers of semiarid environments, however, very few studies about fish passage performance through pool-type fishways has been carried out to date on these regions. The present work focuses on the passage performance of two potamodromous cyprinids endemic of these regions, with different ecological and swimming behavior: southern Iberian barbel (Luciobarbus sclateri) and Iberian straight-mouth nase (Pseudochondrostoma polylepis), in two of the most common types of stepped fishways: vertical slot and submerged notch with bottom orifice fishways. Experiments were carried out during the spawning season in the Segura River (South-Eastern Spain), using a PIT tag and antennas system. Ascent success was greater than 80%, with a median transit time lower than 17 minutes per meter of height in all trials and for both species and fishway types. Results show that both types of fishways, if correctly designed and built, provide interesting alternatives for the restoration of fish migration pathways on these regions.

Parasitism of asymmetrical pelvic phenotypes in stickleback

1997 ◽  
Vol 75 (12) ◽  
pp. 2084-2094 ◽  
Author(s):  
T. E. Reimchen
Keyword(s):  
Genetic Background ◽  
Gasterosteus Aculeatus ◽  
Parasite Species ◽  
Juvenile Fish ◽  
Bilateral Symmetry ◽  
Early Ontogeny ◽  
Directional Asymmetry ◽  
Lower Infection ◽  
Resistance To Infection ◽  
Multiple Species

Subtle departures from bilateral symmetry in morphological traits result from environmental and genetic stresses and may signal an inferior genetic background. Because one correlate of an inferior genome is reduced resistance to infection, such asymmetry may provide a phenotypic signal of susceptibility to parasitism. I tested this hypothesis in a population of threespine stickleback (Gasterosteus aculeatus) with cestode and nematode infections and bilateral asymmetry of the pelvis. Seventeen percent of the fish had an asymmetrical pelvis and, of these, 78% had greater expression on the left side; this directionality suggests a genetic influence. Females had consistently greater left-side asymmetry than did males. The incidence of total infection (all parasite species) in the largest adult fish (> 60 mm body length) was greater in asymmetrical phenotypes, and this occurred in both sexes and for each parasite species (Schistocephalus solidus, Cyathocephalus truncatus, Eustrongylides spp.), even when multiple-species infections were excluded. Contrary to prediction, however, in juvenile fish (< 20 mm) and yearlings (20–40 mm) but not subadults and adults (40–60 mm), asymmetrical phenotypes had significantly lower infection rates than symmetrical fish. This pattern occurred in both sexes, but the extent of the association varied over the 14 years of sampling. Consequently, if the directional asymmetry of the pelvis is under genetic control, asymmetry would be favoured during early ontogeny but selected against during the adult stages. The data support the hypothesis that asymmetry is a phenotypic signal of parasitism, but the unexpected bidirectionality of the association within a single population suggests increased complexity of the processes coupling asymmetry and genetic background.

scholarly journals Design and Function Monitoring of an Enature® Vertical Slot Fish Pass in a Large Potamal River in Carinthia/Austria

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 551 ◽  
Author(s):  
Helmut Mader ◽  
Andreas Brandl ◽  
Sabine Käfer
Keyword(s):  
Power Plant ◽  
Ecological Status ◽  
Fish Passage ◽  
Ecological Effect ◽  
Survey Method ◽  
Hydro Power ◽  
Pass System ◽  
Fish Pass ◽  
Vertical Slot ◽  
Longitudinal Connectivity

To establish good ecological status in European rivers, firstly there is the question of how to re-establish unhindered migration for fish at barriers. This article documents a project to re-establish longitudinal connectivity at a large epipotamal river at the Schwabeck Hydro Power Plant, Carinthia/Austria, from the selection of an appropriate fish pass system to the final function control. Instead of a standard vertical slot, the innovative enature® fish pass shape with a significant reduction of flow, velocities, energy dissipation rate, and turbulences, but with a clear enhancement of fish passage capability, was chosen. Using 2D hydraulic modelling and a statistical evaluation of fish passage, physical and ecological effects were reviewed, with the clear result that there is no identifiable, positive ecological effect on the number of fish migrating with an increase of concurrent flow in the fish pass. Passability and findability were monitored with the new FishCam, an automatic, precise, and constant (24/7 24 h a day, seven days a week) collection and pre-evaluation field data survey method which does not involve trapping of, contact with, or stress for fish. It was shown that the enature® fish pass enables an unhindered migration for all available fish species. As >99% of fish migrate from April to November, there is no ecological need to operate a fully functional fish pass year-round. Combining all the individual factors together, the fish pass at the Schwabeck Hydro Power Plant is an almost exemplary solution for a fully functioning restauration of the continuum with a minimized loss of generation of electricity.

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