Editorial: Global fish passage issues

Zielinski, Daniel; Gaden, Marc; Muir, Andrew M.

doi:10.1016/j.aaf.2021.01.005

Cited by 1 publication

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fish passage facilities in estuaries are relatively unique, and they need to take into account both tidal changes and the migratory needs of brackish and freshwater migratory fishes. The structural type of fish passage facilities is worthy of more consideration [4][5][6]. Unlike vertical slot fishways (VSFs), which have the obvious duality of water flow characteristics, combined bulkhead fishways combine vertical slits, submerged orifices, overflow weirs, and ecologically similar fishways to make full use of the advantages of various forms of fishways [7].…”

Section: Introductionmentioning

confidence: 99%

Response of Upstream Behavior and Hydrodynamic Factors of Anguilla Japonica in a Combined Bulkhead Fishway under Tidal Conditions

Zhou

Lian

Bai

et al. 2023

Water

View full text Add to dashboard Cite

Frequent changes in the tide levels in estuaries cause constant changes in the hydraulics of fish passage systems, with important effects on successful fish passage and swimming behavior. In most cases, Japanese eels often have low passage rates in engineered fishways because of their special habits. In this study, we established a 1:4 scaled-down weir-hole combination bulkhead fishway, studied the effects of different tidal differences and water depths on the passage rates and swimming behavior of yellow-phase Japanese eels, and analyzed the response of the Japanese eels to the hydraulic factors by superimposing their swimming trajectories and the flow field simulation results. We found that the passage rate of the eels decreased from 68.18% to 50.00% and 45.45% under extreme high tide differences and extreme low tide differences, respectively. The eels tended to use the low-velocity area to climb up the wall, and when crossing the mainstream, the yellow-phase Japanese eels preferred the area with a flow velocity of 0.1~0.36 m/s and a turbulent kinetic energy range of 0.001~0.007 m2/s2. Their upstream swimming speed was maintained at a range of 0.1~0.3 m/s.

show abstract