Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Experimental evaluation of louver guidance efficiency for green sturgeon (Acipenser medirostris)
Throughout the world, louver‐bypass systems are a common method for fish protection at water diversion sites. Their performance has been evaluated for pelagic, strong‐swimming teleost fishes, but limited information exists regarding the effectiveness of louvers for guiding sturgeon, despite being a globally threatened taxon. This study used controlled laboratory experiments to quantify louver efficiency for juvenile green sturgeon under a range of conditions. Fish guidance efficiency was influenced most strongly by fish size and approach velocity, with poor efficiency for small fish at high velocities. Low velocities and, to a lesser extent, daylight conditions allowed a greater proportion of fish to remain upstream of the louver at all sizes. High velocities resulted in the greatest contact rate between the sturgeon and louver face. Louvers can be effective for benthic, weak‐swimming fish, but site‐ and species‐specific needs should always be considered in the development or operation of a louver guidance system.
Experimental evaluation of louver guidance efficiency for green sturgeon (Acipenser medirostris)
Throughout the world, louver‐bypass systems are a common method for fish protection at water diversion sites. Their performance has been evaluated for pelagic, strong‐swimming teleost fishes, but limited information exists regarding the effectiveness of louvers for guiding sturgeon, despite being a globally threatened taxon. This study used controlled laboratory experiments to quantify louver efficiency for juvenile green sturgeon under a range of conditions. Fish guidance efficiency was influenced most strongly by fish size and approach velocity, with poor efficiency for small fish at high velocities. Low velocities and, to a lesser extent, daylight conditions allowed a greater proportion of fish to remain upstream of the louver at all sizes. High velocities resulted in the greatest contact rate between the sturgeon and louver face. Louvers can be effective for benthic, weak‐swimming fish, but site‐ and species‐specific needs should always be considered in the development or operation of a louver guidance system.
Experimental evaluation of louver guidance efficiency for green sturgeon (Acipenser medirostris)
Steel, Anna E. (Autor:in) / Nguyen, Trinh (Autor:in) / Cocherell, Dennis E. (Autor:in) / Carr, Kara J. (Autor:in) / Bell, Heather (Autor:in) / Peterson, Amanda (Autor:in) / Kavvas, M. Levent (Autor:in) / Fangue, Nann A. (Autor:in)
River Research and Applications ; 38 ; 1609-1619
01.11.2022
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Movement and habitat use of green sturgeon Acipenser medirostris in the Rogue River, Oregon, USA
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A comparison of meristic and morphometric characters of green sturgeon Acipencer medirostris
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